From 21f79cf2e5deabe13289b2e2a7a271c12e785fdd Mon Sep 17 00:00:00 2001
From: Julian Hofer <julianhofer@gnome.org>
Date: Sun, 22 Oct 2023 12:58:45 +0200
Subject: [PATCH] book: Add example that reqwest fails without tokio

---
 book/listings/Cargo.lock                | 402 ++++++++++++------------
 book/listings/Cargo.toml                |   3 +
 book/listings/main_event_loop/8/main.rs |  12 +-
 book/listings/main_event_loop/9/main.rs |  67 ++++
 book/src/main_event_loop.md             |  18 +-
 5 files changed, 291 insertions(+), 211 deletions(-)
 create mode 100644 book/listings/main_event_loop/9/main.rs

diff --git a/book/listings/Cargo.lock b/book/listings/Cargo.lock
index 14181167a0c0..79148665fab8 100644
--- a/book/listings/Cargo.lock
+++ b/book/listings/Cargo.lock
@@ -28,17 +28,15 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.72"
+version = "1.0.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b13c32d80ecc7ab747b80c3784bce54ee8a7a0cc4fbda9bf4cda2cf6fe90854"
+checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
 
 [[package]]
-<<<<<<< HEAD
-=======
 name = "ashpd"
-version = "0.6.2"
+version = "0.6.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3affe251686bd936a0afb74b9693e8bf2f193d51da1b9a45d3f1303a9bd2cc7"
+checksum = "2c018490e423efb6f032ef575f873ea57b61d44bec763cfe027b8e8852a027cf"
 dependencies = [
  "async-std",
  "enumflags2",
@@ -61,29 +59,26 @@ version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c48ccdbf6ca6b121e0f586cbc0e73ae440e56c67c30fa0873b4e110d9c26d2b"
 dependencies = [
- "event-listener",
+ "event-listener 2.5.3",
  "futures-core",
 ]
 
 [[package]]
->>>>>>> b238756d02 (book: Extend main loop chapter with async section)
 name = "async-channel"
 version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "81953c529336010edd6d8e358f886d9581267795c61b19475b71314bffa46d35"
 dependencies = [
  "concurrent-queue",
- "event-listener",
+ "event-listener 2.5.3",
  "futures-core",
 ]
 
 [[package]]
-<<<<<<< HEAD
-=======
 name = "async-executor"
-version = "1.5.4"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c1da3ae8dabd9c00f453a329dfe1fb28da3c0a72e2478cdcd93171740c20499"
+checksum = "4b0c4a4f319e45986f347ee47fef8bf5e81c9abc3f6f58dc2391439f30df65f0"
 dependencies = [
  "async-lock",
  "async-task",
@@ -134,9 +129,9 @@ dependencies = [
  "log",
  "parking",
  "polling",
- "rustix 0.37.24",
+ "rustix 0.37.26",
  "slab",
- "socket2 0.4.9",
+ "socket2 0.4.10",
  "waker-fn",
 ]
 
@@ -146,24 +141,23 @@ version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "287272293e9d8c41773cec55e365490fe034813a2f172f502d6ddcf75b2f582b"
 dependencies = [
- "event-listener",
+ "event-listener 2.5.3",
 ]
 
 [[package]]
 name = "async-process"
-version = "1.7.0"
+version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a9d28b1d97e08915212e2e45310d47854eafa69600756fc735fb788f75199c9"
+checksum = "ea6438ba0a08d81529c69b36700fa2f95837bfe3e776ab39cde9c14d9149da88"
 dependencies = [
  "async-io",
  "async-lock",
- "autocfg",
+ "async-signal",
  "blocking",
  "cfg-if",
- "event-listener",
+ "event-listener 3.0.0",
  "futures-lite",
- "rustix 0.37.24",
- "signal-hook",
+ "rustix 0.38.20",
  "windows-sys",
 ]
 
@@ -175,7 +169,25 @@ checksum = "5fd55a5ba1179988837d24ab4c7cc8ed6efdeff578ede0416b4225a5fca35bd0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.38",
+]
+
+[[package]]
+name = "async-signal"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2a5415b7abcdc9cd7d63d6badba5288b2ca017e3fbd4173b8f405449f1a2399"
+dependencies = [
+ "async-io",
+ "async-lock",
+ "atomic-waker",
+ "cfg-if",
+ "futures-core",
+ "futures-io",
+ "rustix 0.38.20",
+ "signal-hook-registry",
+ "slab",
+ "windows-sys",
 ]
 
 [[package]]
@@ -206,19 +218,19 @@ dependencies = [
 
 [[package]]
 name = "async-task"
-version = "4.4.1"
+version = "4.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9441c6b2fe128a7c2bf680a44c34d0df31ce09e5b7e401fcca3faa483dbc921"
+checksum = "b4eb2cdb97421e01129ccb49169d8279ed21e829929144f4a22a6e54ac549ca1"
 
 [[package]]
 name = "async-trait"
-version = "0.1.73"
+version = "0.1.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc00ceb34980c03614e35a3a4e218276a0a824e911d07651cd0d858a51e8c0f0"
+checksum = "a66537f1bb974b254c98ed142ff995236e81b9d0fe4db0575f46612cb15eb0f9"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.38",
 ]
 
 [[package]]
@@ -228,7 +240,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
 
 [[package]]
->>>>>>> b238756d02 (book: Extend main loop chapter with async section)
 name = "autocfg"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -263,9 +274,9 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "bitflags"
-version = "2.3.3"
+version = "2.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "630be753d4e58660abd17930c71b647fe46c27ea6b63cc59e1e3851406972e42"
+checksum = "327762f6e5a765692301e5bb513e0d9fef63be86bbc14528052b1cd3e6f03e07"
 
 [[package]]
 name = "block-buffer"
@@ -312,11 +323,11 @@ checksum = "a2bd12c1caf447e69cd4528f47f94d203fd2582878ecb9e9465484c4148a8223"
 
 [[package]]
 name = "cairo-rs"
-version = "0.18.0"
+version = "0.18.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d859b656775a6b1dd078d3e5924884e6ea88aa649a7fdde03d5b2ec56ffcc10b"
+checksum = "1c0466dfa8c0ee78deef390c274ad756801e0a6dbb86c5ef0924a298c5761c4d"
 dependencies = [
- "bitflags 2.3.3",
+ "bitflags 2.4.1",
  "cairo-sys-rs",
  "glib",
  "libc",
@@ -326,9 +337,9 @@ dependencies = [
 
 [[package]]
 name = "cairo-sys-rs"
-version = "0.18.0"
+version = "0.18.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd4d115132e01c0165e3bf5f56aedee8980b0b96ede4eb000b693c05a8adb8ff"
+checksum = "685c9fa8e590b8b3d678873528d83411db17242a73fccaed827770ea0fedda51"
 dependencies = [
  "glib-sys",
  "libc",
@@ -346,9 +357,9 @@ dependencies = [
 
 [[package]]
 name = "cfg-expr"
-version = "0.15.4"
+version = "0.15.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b40ccee03b5175c18cde8f37e7d2a33bcef6f8ec8f7cc0d81090d1bb380949c9"
+checksum = "03915af431787e6ffdcc74c645077518c6b6e01f80b761e0fbbfa288536311b3"
 dependencies = [
  "smallvec",
  "target-lexicon",
@@ -370,10 +381,6 @@ dependencies = [
 ]
 
 [[package]]
-<<<<<<< HEAD
-<<<<<<< HEAD
-=======
-=======
 name = "core-foundation"
 version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -390,17 +397,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e496a50fda8aacccc86d7529e2c1e0892dbd0f898a6b5645b5561b89c3210efa"
 
 [[package]]
->>>>>>> e6a11799e4 (book: Add tokio and reqwest listing)
 name = "cpufeatures"
-version = "0.2.9"
+version = "0.2.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a17b76ff3a4162b0b27f354a0c87015ddad39d35f9c0c36607a3bdd175dde1f1"
+checksum = "3fbc60abd742b35f2492f808e1abbb83d45f72db402e14c55057edc9c7b1e9e4"
 dependencies = [
  "libc",
 ]
 
 [[package]]
->>>>>>> b238756d02 (book: Extend main loop chapter with async section)
 name = "crossbeam-utils"
 version = "0.8.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -410,8 +415,6 @@ dependencies = [
 ]
 
 [[package]]
-<<<<<<< HEAD
-=======
 name = "crypto-common"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -443,7 +446,6 @@ dependencies = [
 ]
 
 [[package]]
->>>>>>> b238756d02 (book: Extend main loop chapter with async section)
 name = "dirs"
 version = "5.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -491,7 +493,7 @@ checksum = "f95e2801cd355d4a1a3e3953ce6ee5ae9603a5c833455343a8bfe3f44d418246"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.38",
 ]
 
 [[package]]
@@ -501,8 +503,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
 [[package]]
-<<<<<<< HEAD
-=======
 name = "errno"
 version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -513,15 +513,23 @@ dependencies = [
 ]
 
 [[package]]
->>>>>>> b238756d02 (book: Extend main loop chapter with async section)
 name = "event-listener"
 version = "2.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0206175f82b8d6bf6652ff7d71a1e27fd2e4efde587fd368662814d6ec1d9ce0"
 
 [[package]]
-<<<<<<< HEAD
-=======
+name = "event-listener"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29e56284f00d94c1bc7fd3c77027b4623c88c1f53d8d2394c6199f2921dea325"
+dependencies = [
+ "concurrent-queue",
+ "parking",
+ "pin-project-lite",
+]
+
+[[package]]
 name = "fastrand"
 version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -537,7 +545,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "25cbce373ec4653f1a01a31e8a5e5ec0c622dc27ff9c4e6606eefef5cbbed4a5"
 
 [[package]]
->>>>>>> b238756d02 (book: Extend main loop chapter with async section)
 name = "field-offset"
 version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -617,7 +624,7 @@ checksum = "89ca545a94061b6365f2c7355b4b32bd20df3ff95f02da9329b34ccc3bd6ee72"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.38",
 ]
 
 [[package]]
@@ -677,9 +684,9 @@ dependencies = [
 
 [[package]]
 name = "gdk4"
-version = "0.7.1"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8965ed5455cbfa1eb45c14a3b971cbacb43481913a3a5b9078b2ef0d9a01bd4b"
+checksum = "7edb019ad581f8ecf8ea8e4baa6df7c483a95b5a59be3140be6a9c3b0c632af6"
 dependencies = [
  "cairo-rs",
  "gdk-pixbuf",
@@ -692,9 +699,9 @@ dependencies = [
 
 [[package]]
 name = "gdk4-sys"
-version = "0.7.1"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aeffd4a7d68046c28666d817071bf025254aaed4df35099443f0c306ca6177f3"
+checksum = "dbab43f332a3cf1df9974da690b5bb0e26720ed09a228178ce52175372dcfef0"
 dependencies = [
  "cairo-sys-rs",
  "gdk-pixbuf-sys",
@@ -785,9 +792,9 @@ checksum = "6fb8d784f27acf97159b40fc4db5ecd8aa23b9ad5ef69cdd136d3bc80665f0c0"
 
 [[package]]
 name = "gio"
-version = "0.18.1"
+version = "0.18.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7884cba6b1c5db1607d970cadf44b14a43913d42bc68766eea6a5e2fe0891524"
+checksum = "57052f84e8e5999b258e8adf8f5f2af0ac69033864936b8b6838321db2f759b1"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -817,11 +824,11 @@ dependencies = [
 
 [[package]]
 name = "glib"
-version = "0.18.1"
+version = "0.18.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "331156127e8166dd815cf8d2db3a5beb492610c716c03ee6db4f2d07092af0a7"
+checksum = "1c316afb01ce8067c5eaab1fc4f2cd47dc21ce7b6296358605e2ffab23ccbd19"
 dependencies = [
- "bitflags 2.3.3",
+ "bitflags 2.4.1",
  "futures-channel",
  "futures-core",
  "futures-executor",
@@ -846,16 +853,16 @@ checksum = "3431c56f463443cba9bc3600248bc6d680cb614c2ee1cdd39dab5415bd12ac5c"
 
 [[package]]
 name = "glib-macros"
-version = "0.18.0"
+version = "0.18.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "179643c50bf28d20d2f6eacd2531a88f2f5d9747dd0b86b8af1e8bb5dd0de3c0"
+checksum = "f8da903822b136d42360518653fcf154455defc437d3e7a81475bf9a95ff1e47"
 dependencies = [
  "heck",
  "proc-macro-crate",
  "proc-macro-error",
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.38",
 ]
 
 [[package]]
@@ -916,9 +923,9 @@ dependencies = [
 
 [[package]]
 name = "gsk4"
-version = "0.7.1"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53b3b9e8090acb325d08cde84b30fc29b963a75fbac93160e9c5a30d2b335742"
+checksum = "0d958e351d2f210309b32d081c832d7de0aca0b077aa10d88336c6379bd01f7e"
 dependencies = [
  "cairo-rs",
  "gdk4",
@@ -931,9 +938,9 @@ dependencies = [
 
 [[package]]
 name = "gsk4-sys"
-version = "0.7.0"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0770d1ede7189092748c4ef5b6921264eb945fd2318a58e8f59dc273000810f8"
+checksum = "12bd9e3effea989f020e8f1ff3fa3b8c63ba93d43b899c11a118868853a56d55"
 dependencies = [
  "cairo-sys-rs",
  "gdk4-sys",
@@ -947,9 +954,9 @@ dependencies = [
 
 [[package]]
 name = "gtk4"
-version = "0.7.1"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0973f9b9ade10fc22403810b7283d47b533033715f2aaa36288cd3bf90d63efc"
+checksum = "5aeb51aa3e9728575a053e1f43543cd9992ac2477e1b186ad824fd4adfb70842"
 dependencies = [
  "cairo-rs",
  "field-offset",
@@ -968,9 +975,9 @@ dependencies = [
 
 [[package]]
 name = "gtk4-macros"
-version = "0.7.1"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae9f2c4530f3168fe506b0be7bc15f7a93ef38d020edb27d81a921a26cbca851"
+checksum = "d57ec49cf9b657f69a05bca8027cff0a8dfd0c49e812be026fc7311f2163832f"
 dependencies = [
  "anyhow",
  "proc-macro-crate",
@@ -985,11 +992,8 @@ name = "gtk4-rs-book-listings"
 version = "0.1.0"
 dependencies = [
  "anyhow",
-<<<<<<< HEAD
- "async-channel",
-=======
  "ashpd",
->>>>>>> b238756d02 (book: Extend main loop chapter with async section)
+ "async-channel",
  "dirs",
  "glib-build-tools",
  "gtk4",
@@ -1005,9 +1009,9 @@ dependencies = [
 
 [[package]]
 name = "gtk4-sys"
-version = "0.7.0"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19fde71ef2e78ac8fb18073c345b5f29609048d4045a345613645aa1163243c1"
+checksum = "54d8c4aa23638ce9faa2caf7e2a27d4a1295af2155c8e8d28c4d4eeca7a65eb8"
 dependencies = [
  "cairo-sys-rs",
  "gdk-pixbuf-sys",
@@ -1049,9 +1053,9 @@ checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
 
 [[package]]
 name = "hashbrown"
-version = "0.14.0"
+version = "0.14.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c6201b9ff9fd90a5a3bac2e56a830d0caa509576f0e503818ee82c181b3437a"
+checksum = "f93e7192158dbcda357bdec5fb5788eebf8bbac027f3f33e719d29135ae84156"
 
 [[package]]
 name = "heck"
@@ -1122,7 +1126,7 @@ dependencies = [
  "httpdate",
  "itoa",
  "pin-project-lite",
- "socket2 0.4.9",
+ "socket2 0.4.10",
  "tokio",
  "tower-service",
  "tracing",
@@ -1165,12 +1169,12 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.0.0"
+version = "2.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d5477fe2230a79769d8dc68e0eabf5437907c0457a5614a9e8dddb67f65eb65d"
+checksum = "8adf3ddd720272c6ea8bf59463c04e0f93d0bbf7c5439b691bca2987e0270897"
 dependencies = [
  "equivalent",
- "hashbrown 0.14.0",
+ "hashbrown 0.14.2",
 ]
 
 [[package]]
@@ -1225,9 +1229,9 @@ dependencies = [
 
 [[package]]
 name = "libadwaita"
-version = "0.5.2"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06444f4ca05a60693da6e9e2b591bd40a298e65a118a8d5e830771718b3e0253"
+checksum = "2fe7e70c06507ed10a16cda707f358fbe60fe0dc237498f78c686ade92fd979c"
 dependencies = [
  "gdk-pixbuf",
  "gdk4",
@@ -1241,9 +1245,9 @@ dependencies = [
 
 [[package]]
 name = "libadwaita-sys"
-version = "0.5.2"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "021cfe3d1fcfa82411765a791f7e9b32f35dd98ce88d2e3fa10e7320f5cc8ce7"
+checksum = "5e10aaa38de1d53374f90deeb4535209adc40cc5dba37f9704724169bceec69a"
 dependencies = [
  "gdk4-sys",
  "gio-sys",
@@ -1257,9 +1261,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.147"
+version = "0.2.149"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"
+checksum = "a08173bc88b7955d1b3145aa561539096c421ac8debde8cbc3612ec635fee29b"
 
 [[package]]
 name = "linux-raw-sys"
@@ -1284,9 +1288,9 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.5.0"
+version = "2.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
 
 [[package]]
 name = "memoffset"
@@ -1412,9 +1416,9 @@ dependencies = [
 
 [[package]]
 name = "parking"
-version = "2.1.1"
+version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e52c774a4c39359c1d1c52e43f73dd91a75a614652c825408eec30c95a9b2067"
+checksum = "bb813b8af86854136c6922af0598d719255ecb2179515e6e7730d468f05c9cae"
 
 [[package]]
 name = "percent-encoding"
@@ -1480,7 +1484,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f4c021e1093a56626774e81216a4ce732a735e5bad4868a03f3ed65ca0c3919"
 dependencies = [
  "once_cell",
- "toml_edit",
+ "toml_edit 0.19.15",
 ]
 
 [[package]]
@@ -1509,18 +1513,18 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.66"
+version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18fb31db3f9bddb2ea821cde30a9f70117e3f119938b5ee630b7403aa6e2ead9"
+checksum = "134c189feb4956b20f6f547d2cf727d4c0fe06722b20a0eec87ed445a97f92da"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.32"
+version = "1.0.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50f3b39ccfb720540debaa0164757101c08ecb8d326b15358ce76a62c7e85965"
+checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
 dependencies = [
  "proc-macro2",
 ]
@@ -1586,9 +1590,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.9.4"
+version = "1.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12de2eff854e5fa4b1295edd650e227e9d8fb0c9e90b12e7f36d6a6811791a29"
+checksum = "380b951a9c5e80ddfd6136919eef32310721aa4aacd4889a8d39124b026ab343"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -1598,9 +1602,9 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.3.7"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49530408a136e16e5b486e883fbb6ba058e8e4e8ae6621a77b048b314336e629"
+checksum = "5f804c7828047e88b2d32e2d7fe5a105da8ee3264f01902f796c8e067dc2483f"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -1609,9 +1613,9 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.7.5"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dbb5fb1acd8a1a18b3dd5be62d25485eb770e05afb408a9627d14d451bae12da"
+checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
 
 [[package]]
 name = "reqwest"
@@ -1685,9 +1689,9 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.37.24"
+version = "0.37.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4279d76516df406a8bd37e7dff53fd37d1a093f997a3c34a5c21658c126db06d"
+checksum = "84f3f8f960ed3b5a59055428714943298bf3fa2d4a1d53135084e0544829d995"
 dependencies = [
  "bitflags 1.3.2",
  "errno",
@@ -1699,11 +1703,11 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.38.8"
+version = "0.38.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19ed4fa021d81c8392ce04db050a3da9a60299050b7ae1cf482d862b54a7218f"
+checksum = "67ce50cb2e16c2903e30d1cbccfd8387a74b9d4c938b6a4c5ec6cc7556f7a8a0"
 dependencies = [
- "bitflags 2.3.3",
+ "bitflags 2.4.1",
  "errno",
  "libc",
  "linux-raw-sys 0.4.10",
@@ -1768,35 +1772,35 @@ dependencies = [
 
 [[package]]
 name = "semver"
-version = "1.0.18"
+version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0293b4b29daaf487284529cc2f5675b8e57c61f70167ba415a463651fd6a918"
+checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
 [[package]]
 name = "serde"
-version = "1.0.181"
+version = "1.0.189"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d3e73c93c3240c0bda063c239298e633114c69a888c3e37ca8bb33f343e9890"
+checksum = "8e422a44e74ad4001bdc8eede9a4570ab52f71190e9c076d14369f38b9200537"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.181"
+version = "1.0.189"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be02f6cb0cd3a5ec20bbcfbcbd749f57daddb1a0882dc2e46a6c236c90b977ed"
+checksum = "1e48d1f918009ce3145511378cf68d613e3b3d9137d67272562080d68a2b32d5"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.38",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.104"
+version = "1.0.107"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "076066c5f1078eac5b722a31827a8832fe108bed65dfa75e233c89f8206e976c"
+checksum = "6b420ce6e3d8bd882e9b243c6eed35dbc9a6110c9769e74b584e0d68d1f20c65"
 dependencies = [
  "itoa",
  "ryu",
@@ -1811,7 +1815,7 @@ checksum = "8725e1dfadb3a50f7e5ce0b1a540466f6ed3fe7a0fca2ac2b8b831d31316bd00"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.38",
 ]
 
 [[package]]
@@ -1846,16 +1850,6 @@ dependencies = [
  "digest",
 ]
 
-[[package]]
-name = "signal-hook"
-version = "0.3.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8621587d4798caf8eb44879d42e56b9a93ea5dcd315a6487c357130095b62801"
-dependencies = [
- "libc",
- "signal-hook-registry",
-]
-
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.1"
@@ -1867,24 +1861,24 @@ dependencies = [
 
 [[package]]
 name = "slab"
-version = "0.4.8"
+version = "0.4.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6528351c9bc8ab22353f9d776db39a20288e8d6c37ef8cfe3317cf875eecfc2d"
+checksum = "8f92a496fb766b417c996b9c5e57daf2f7ad3b0bebe1ccfca4856390e3d3bb67"
 dependencies = [
  "autocfg",
 ]
 
 [[package]]
 name = "smallvec"
-version = "1.11.0"
+version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62bb4feee49fdd9f707ef802e22365a35de4b7b299de4763d44bfea899442ff9"
+checksum = "942b4a808e05215192e39f4ab80813e599068285906cc91aa64f923db842bd5a"
 
 [[package]]
 name = "socket2"
-version = "0.4.9"
+version = "0.4.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64a4a911eed85daf18834cfaa86a79b7d266ff93ff5ba14005426219480ed662"
+checksum = "9f7916fc008ca5542385b89a3d3ce689953c143e9304a9bf8beec1de48994c0d"
 dependencies = [
  "libc",
  "winapi",
@@ -1892,9 +1886,9 @@ dependencies = [
 
 [[package]]
 name = "socket2"
-version = "0.5.4"
+version = "0.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4031e820eb552adee9295814c0ced9e5cf38ddf1e8b7d566d6de8e2538ea989e"
+checksum = "7b5fac59a5cb5dd637972e5fca70daf0523c9067fcdc4842f053dae04a18f8e9"
 dependencies = [
  "libc",
  "windows-sys",
@@ -1925,9 +1919,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.28"
+version = "2.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04361975b3f5e348b2189d8dc55bc942f278b2d482a6a0365de5bdd62d351567"
+checksum = "e96b79aaa137db8f61e26363a0c9b47d8b4ec75da28b7d1d614c2303e232408b"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1957,9 +1951,9 @@ dependencies = [
 
 [[package]]
 name = "system-deps"
-version = "6.1.1"
+version = "6.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "30c2de8a4d8f4b823d634affc9cd2a74ec98c53a756f317e529a48046cbf71f3"
+checksum = "94af52f9402f94aac4948a2518b43359be8d9ce6cd9efc1c4de3b2f7b7e897d6"
 dependencies = [
  "cfg-expr",
  "heck",
@@ -1970,9 +1964,9 @@ dependencies = [
 
 [[package]]
 name = "target-lexicon"
-version = "0.12.11"
+version = "0.12.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d0e916b1148c8e263850e1ebcbd046f333e0683c724876bb0da63ea4373dc8a"
+checksum = "14c39fd04924ca3a864207c66fc2cd7d22d7c016007f9ce846cbb9326331930a"
 
 [[package]]
 name = "tempfile"
@@ -1983,28 +1977,28 @@ dependencies = [
  "cfg-if",
  "fastrand 2.0.1",
  "redox_syscall 0.3.5",
- "rustix 0.38.8",
+ "rustix 0.38.20",
  "windows-sys",
 ]
 
 [[package]]
 name = "thiserror"
-version = "1.0.44"
+version = "1.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "611040a08a0439f8248d1990b111c95baa9c704c805fa1f62104b39655fd7f90"
+checksum = "f9a7210f5c9a7156bb50aa36aed4c95afb51df0df00713949448cf9e97d382d2"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.44"
+version = "1.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "090198534930841fab3a5d1bb637cde49e339654e606195f8d9c76eeb081dc96"
+checksum = "266b2e40bc00e5a6c09c3584011e08b06f123c00362c92b975ba9843aaaa14b8"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.38",
 ]
 
 [[package]]
@@ -2034,7 +2028,7 @@ dependencies = [
  "mio",
  "num_cpus",
  "pin-project-lite",
- "socket2 0.5.4",
+ "socket2 0.5.5",
  "windows-sys",
 ]
 
@@ -2064,14 +2058,14 @@ dependencies = [
 
 [[package]]
 name = "toml"
-version = "0.7.6"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c17e963a819c331dcacd7ab957d80bc2b9a9c1e71c804826d2f283dd65306542"
+checksum = "185d8ab0dfbb35cf1399a6344d8484209c088f75f8f68230da55d48d95d43e3d"
 dependencies = [
  "serde",
  "serde_spanned",
  "toml_datetime",
- "toml_edit",
+ "toml_edit 0.20.2",
 ]
 
 [[package]]
@@ -2085,11 +2079,22 @@ dependencies = [
 
 [[package]]
 name = "toml_edit"
-version = "0.19.14"
+version = "0.19.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8123f27e969974a3dfba720fdb560be359f57b44302d280ba72e76a74480e8a"
+checksum = "1b5bb770da30e5cbfde35a2d7b9b8a2c4b8ef89548a7a6aeab5c9a576e3e7421"
 dependencies = [
- "indexmap 2.0.0",
+ "indexmap 2.0.2",
+ "toml_datetime",
+ "winnow",
+]
+
+[[package]]
+name = "toml_edit"
+version = "0.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "396e4d48bbb2b7554c944bde63101b5ae446cff6ec4a24227428f15eb72ef338"
+dependencies = [
+ "indexmap 2.0.2",
  "serde",
  "serde_spanned",
  "toml_datetime",
@@ -2104,11 +2109,10 @@ checksum = "b6bc1c9ce2b5135ac7f93c72918fc37feb872bdc6a5533a8b85eb4b86bfdae52"
 
 [[package]]
 name = "tracing"
-version = "0.1.37"
+version = "0.1.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ce8c33a8d48bd45d624a6e523445fd21ec13d3653cd51f681abf67418f54eb8"
+checksum = "c3523ab5a71916ccf420eebdf5521fcef02141234bbc0b8a49f2fdc4544364ef"
 dependencies = [
- "cfg-if",
  "pin-project-lite",
  "tracing-attributes",
  "tracing-core",
@@ -2116,20 +2120,20 @@ dependencies = [
 
 [[package]]
 name = "tracing-attributes"
-version = "0.1.26"
+version = "0.1.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f4f31f56159e98206da9efd823404b79b6ef3143b4a7ab76e67b1751b25a4ab"
+checksum = "34704c8d6ebcbc939824180af020566b01a7c01f80641264eba0999f6c2b6be7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.38",
 ]
 
 [[package]]
 name = "tracing-core"
-version = "0.1.31"
+version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0955b8137a1df6f1a2e9a37d8a6656291ff0297c1a97c24e0d8425fe2312f79a"
+checksum = "c06d3da6113f116aaee68e4d601191614c9053067f9ab7f6edbcb161237daa54"
 dependencies = [
  "once_cell",
 ]
@@ -2164,9 +2168,9 @@ checksum = "92888ba5573ff080736b3648696b70cafad7d250551175acbaa4e0385b3e1460"
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.11"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "301abaae475aa91687eb82514b328ab47a211a533026cb25fc3e519b86adfc3c"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
 [[package]]
 name = "unicode-normalization"
@@ -2197,9 +2201,9 @@ dependencies = [
 
 [[package]]
 name = "value-bag"
-version = "1.4.1"
+version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d92ccd67fb88503048c01b59152a04effd0782d035a83a6d256ce6085f08f4a3"
+checksum = "4a72e1902dde2bd6441347de2b70b7f5d59bf157c6c62f0c44572607a1d55bbe"
 
 [[package]]
 name = "version-compare"
@@ -2221,9 +2225,9 @@ checksum = "f3c4517f54858c779bbcbf228f4fca63d121bf85fbecb2dc578cdf4a39395690"
 
 [[package]]
 name = "walkdir"
-version = "2.3.3"
+version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36df944cda56c7d8d8b7496af378e6b16de9284591917d307c9b4d313c44e698"
+checksum = "d71d857dc86794ca4c280d616f7da00d2dbfd8cd788846559a6813e6aa4b54ee"
 dependencies = [
  "same-file",
  "winapi-util",
@@ -2265,7 +2269,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.38",
  "wasm-bindgen-shared",
 ]
 
@@ -2299,7 +2303,7 @@ checksum = "54681b18a46765f095758388f2d0cf16eb8d4169b639ab575a8f5693af210c7b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.38",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -2344,9 +2348,9 @@ checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
 [[package]]
 name = "winapi-util"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+checksum = "f29e6f9198ba0d26b4c9f07dbe6f9ed633e1f3d5b8b414090084349e46a52596"
 dependencies = [
  "winapi",
 ]
@@ -2368,9 +2372,9 @@ dependencies = [
 
 [[package]]
 name = "windows-targets"
-version = "0.48.1"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05d4b17490f70499f20b9e791dcf6a299785ce8af4d709018206dc5b4953e95f"
+checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
 dependencies = [
  "windows_aarch64_gnullvm",
  "windows_aarch64_msvc",
@@ -2383,51 +2387,51 @@ dependencies = [
 
 [[package]]
 name = "windows_aarch64_gnullvm"
-version = "0.48.0"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
+checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
 
 [[package]]
 name = "windows_aarch64_msvc"
-version = "0.48.0"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
+checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
 
 [[package]]
 name = "windows_i686_gnu"
-version = "0.48.0"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
+checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
 
 [[package]]
 name = "windows_i686_msvc"
-version = "0.48.0"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
+checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
 
 [[package]]
 name = "windows_x86_64_gnu"
-version = "0.48.0"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
+checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
 
 [[package]]
 name = "windows_x86_64_gnullvm"
-version = "0.48.0"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
 
 [[package]]
 name = "windows_x86_64_msvc"
-version = "0.48.0"
+version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
+checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
 
 [[package]]
 name = "winnow"
-version = "0.5.3"
+version = "0.5.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f46aab759304e4d7b2075a9aecba26228bb073ee8c50db796b2c72c676b5d807"
+checksum = "a3b801d0e0a6726477cc207f60162da452f3a95adb368399bef20a946e06f65c"
 dependencies = [
  "memchr",
 ]
@@ -2486,7 +2490,7 @@ dependencies = [
  "byteorder",
  "derivative",
  "enumflags2",
- "event-listener",
+ "event-listener 2.5.3",
  "futures-core",
  "futures-sink",
  "futures-util",
diff --git a/book/listings/Cargo.toml b/book/listings/Cargo.toml
index ac10b9292927..5ecab635a664 100644
--- a/book/listings/Cargo.toml
+++ b/book/listings/Cargo.toml
@@ -221,6 +221,9 @@ path = "main_event_loop/7/main.rs"
 name = "main_event_loop_8"
 path = "main_event_loop/8/main.rs"
 
+[[bin]]
+name = "main_event_loop_9"
+path = "main_event_loop/9/main.rs"
 
 # saving_window_state
 [[bin]]
diff --git a/book/listings/main_event_loop/8/main.rs b/book/listings/main_event_loop/8/main.rs
index 99287d88cee0..192f83ed85e2 100644
--- a/book/listings/main_event_loop/8/main.rs
+++ b/book/listings/main_event_loop/8/main.rs
@@ -2,13 +2,8 @@ use glib::{clone, MainContext, Priority};
 use gtk::glib;
 use gtk::prelude::*;
 use gtk::{Application, ApplicationWindow, Button};
-use once_cell::sync::Lazy;
-use tokio::runtime::Runtime;
 
-// ANCHOR: tokio_runtime
 const APP_ID: &str = "org.gtk_rs.MainEventLoop8";
-static RUNTIME: Lazy<Runtime> =
-    Lazy::new(|| Runtime::new().expect("Setting up tokio runtime needs to succeed."));
 
 fn main() -> glib::ExitCode {
     // Create a new application
@@ -20,7 +15,6 @@ fn main() -> glib::ExitCode {
     // Run the application
     app.run()
 }
-// ANCHOR_END: tokio_runtime
 
 fn build_ui(app: &Application) {
     // Create a button
@@ -36,7 +30,9 @@ fn build_ui(app: &Application) {
     let (sender, receiver) = MainContext::channel(Priority::default());
     // Connect to "clicked" signal of `button`
     button.connect_clicked(move |_| {
-        RUNTIME.spawn(clone!(@strong sender => async move {
+        let main_context = MainContext::default();
+        // The main loop executes the asynchronous block
+        main_context.spawn_local(clone!(@strong sender => async move {
             let response = reqwest::get("https://www.gtk-rs.org").await;
             sender
                 .send(response)
@@ -49,7 +45,7 @@ fn build_ui(app: &Application) {
         if let Ok(response) = response {
             println!("Status {}", response.status());
         } else {
-            println!("Couldn't make a `GET` request.");
+            println!("Could not make a `GET` request.");
         }
         glib::ControlFlow::Continue
     });
diff --git a/book/listings/main_event_loop/9/main.rs b/book/listings/main_event_loop/9/main.rs
new file mode 100644
index 000000000000..899c363f7fb0
--- /dev/null
+++ b/book/listings/main_event_loop/9/main.rs
@@ -0,0 +1,67 @@
+use glib::{clone, MainContext, Priority};
+use gtk::glib;
+use gtk::prelude::*;
+use gtk::{Application, ApplicationWindow, Button};
+use once_cell::sync::Lazy;
+use tokio::runtime::Runtime;
+
+// ANCHOR: tokio_runtime
+const APP_ID: &str = "org.gtk_rs.MainEventLoop8";
+static RUNTIME: Lazy<Runtime> =
+    Lazy::new(|| Runtime::new().expect("Setting up tokio runtime needs to succeed."));
+
+fn main() -> glib::ExitCode {
+    // Create a new application
+    let app = Application::builder().application_id(APP_ID).build();
+
+    // Connect to "activate" signal of `app`
+    app.connect_activate(build_ui);
+
+    // Run the application
+    app.run()
+}
+// ANCHOR_END: tokio_runtime
+
+fn build_ui(app: &Application) {
+    // Create a button
+    let button = Button::builder()
+        .label("Press me!")
+        .margin_top(12)
+        .margin_bottom(12)
+        .margin_start(12)
+        .margin_end(12)
+        .build();
+
+    // ANCHOR: callback
+    let (sender, receiver) = MainContext::channel(Priority::default());
+    // Connect to "clicked" signal of `button`
+    button.connect_clicked(move |_| {
+        RUNTIME.spawn(clone!(@strong sender => async move {
+            let response = reqwest::get("https://www.gtk-rs.org").await;
+            sender
+                .send(response)
+                .expect("Could not send through channel");
+        }));
+    });
+
+    // The main loop executes the closure as soon as it receives the message
+    receiver.attach(None, move |response| {
+        if let Ok(response) = response {
+            println!("Status {}", response.status());
+        } else {
+            println!("Could not make a `GET` request.");
+        }
+        glib::ControlFlow::Continue
+    });
+    // ANCHOR_END: callback
+
+    // Create a window
+    let window = ApplicationWindow::builder()
+        .application(app)
+        .title("My GTK App")
+        .child(&button)
+        .build();
+
+    // Present window
+    window.present();
+}
diff --git a/book/src/main_event_loop.md b/book/src/main_event_loop.md
index 3dc67560da29..0da2aa123a9e 100644
--- a/book/src/main_event_loop.md
+++ b/book/src/main_event_loop.md
@@ -221,20 +221,30 @@ If you decide to share it, you user name will be printed on the console.
 
 
 ```
-cargo add tokio@1 --features rt-multi-thread
 cargo add reqwest@0.11 --features rustls-tls --no-default-features
 ```
 
 Filename: <a class=file-link href="https://github.com/gtk-rs/gtk4-rs/blob/master/book/listings/main_event_loop/8/main.rs">listings/main_event_loop/8/main.rs</a>
 
 ```rust
-{{#rustdoc_include ../listings/main_event_loop/8/main.rs:tokio_runtime}}
+{{#rustdoc_include ../listings/main_event_loop/8/main.rs:callback}}
+```
+
+```
+cargo add tokio@1 --features rt-multi-thread
 ```
 
-Filename: <a class=file-link href="https://github.com/gtk-rs/gtk4-rs/blob/master/book/listings/main_event_loop/8/main.rs">listings/main_event_loop/8/main.rs</a>
+
+Filename: <a class=file-link href="https://github.com/gtk-rs/gtk4-rs/blob/master/book/listings/main_event_loop/9/main.rs">listings/main_event_loop/9/main.rs</a>
 
 ```rust
-{{#rustdoc_include ../listings/main_event_loop/8/main.rs:callback}}
+{{#rustdoc_include ../listings/main_event_loop/9/main.rs:tokio_runtime}}
+```
+
+Filename: <a class=file-link href="https://github.com/gtk-rs/gtk4-rs/blob/master/book/listings/main_event_loop/9/main.rs">listings/main_event_loop/9/main.rs</a>
+
+```rust
+{{#rustdoc_include ../listings/main_event_loop/9/main.rs:callback}}
 ```