Fix some HIR pretty-printing problems #139833
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Printing "no pattern" as `_` isn't ideal, but better than crashing, and HIR pretty-printing already has plenty of imperfections. The added `f2` and `f6` examples are ones that triggered the crash. Note that some of the added examples are printed badly, e.g. `fn(, ...)`. The next commit will fix those. Fixes rust-lang#139633.
Avoid the extraneous comma.
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Rollup of 17 pull requests Successful merges: - rust-lang#138374 (Enable contracts for const functions) - rust-lang#138380 (ci: add runners for vanilla LLVM 20) - rust-lang#138393 (Allow const patterns of matches to contain pattern types) - rust-lang#139517 (std: sys: process: uefi: Use NULL stdin by default) - rust-lang#139554 (std: add Output::exit_ok) - rust-lang#139660 (compiletest: Add an experimental new executor to replace libtest) - rust-lang#139669 (Overhaul `AssocItem`) - rust-lang#139671 (Proc macro span API redesign: Replace proc_macro::SourceFile by Span::{file, local_file}) - rust-lang#139750 (std/thread: Use default stack size from menuconfig for NuttX) - rust-lang#139772 (Remove `hir::Map`) - rust-lang#139785 (Let CStrings be either 1 or 2 byte aligned.) - rust-lang#139789 (do not unnecessarily leak auto traits in item bounds) - rust-lang#139791 (drop global where-bounds before merging candidates) - rust-lang#139798 (normalize: prefer `ParamEnv` over `AliasBound` candidates) - rust-lang#139822 (Fix: Map EOPNOTSUPP to ErrorKind::Unsupported on Unix) - rust-lang#139833 (Fix some HIR pretty-printing problems) - rust-lang#139836 (Basic tests of MPMC receiver cloning) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#139833 - nnethercote:fix-139633, r=oli-obk Fix some HIR pretty-printing problems r? `@oli-obk`
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Rollup of 17 pull requests Successful merges: - rust-lang#138374 (Enable contracts for const functions) - rust-lang#138380 (ci: add runners for vanilla LLVM 20) - rust-lang#138393 (Allow const patterns of matches to contain pattern types) - rust-lang#139517 (std: sys: process: uefi: Use NULL stdin by default) - rust-lang#139554 (std: add Output::exit_ok) - rust-lang#139660 (compiletest: Add an experimental new executor to replace libtest) - rust-lang#139669 (Overhaul `AssocItem`) - rust-lang#139671 (Proc macro span API redesign: Replace proc_macro::SourceFile by Span::{file, local_file}) - rust-lang#139750 (std/thread: Use default stack size from menuconfig for NuttX) - rust-lang#139772 (Remove `hir::Map`) - rust-lang#139785 (Let CStrings be either 1 or 2 byte aligned.) - rust-lang#139789 (do not unnecessarily leak auto traits in item bounds) - rust-lang#139791 (drop global where-bounds before merging candidates) - rust-lang#139798 (normalize: prefer `ParamEnv` over `AliasBound` candidates) - rust-lang#139822 (Fix: Map EOPNOTSUPP to ErrorKind::Unsupported on Unix) - rust-lang#139833 (Fix some HIR pretty-printing problems) - rust-lang#139836 (Basic tests of MPMC receiver cloning) r? `@ghost` `@rustbot` modify labels: rollup
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r? @oli-obk