test: add regression test for the getrawtransaction segfault

This fails on master without the previous commit.

Github-Pull: #29003
Rebased-From: 9075a44

test/functional/rpc_rawtransaction.py

@@ -32,6 +32,7 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
+    assert_greater_than,
     assert_raises_rpc_error,
 )
 from test_framework.wallet import (
@@ -70,7 +71,7 @@ def set_test_params(self):
         self.extra_args = [
             ["-txindex"],
             ["-txindex"],
-            [],
+            ["-fastprune", "-prune=1"],
         ]
         # whitelist all peers to speed up tx relay / mempool sync
         for args in self.extra_args:
@@ -85,7 +86,6 @@ def run_test(self):
         self.wallet = MiniWallet(self.nodes[0])
 
         self.getrawtransaction_tests()
-        self.getrawtransaction_verbosity_tests()
         self.createrawtransaction_tests()
         self.sendrawtransaction_tests()
         self.sendrawtransaction_testmempoolaccept_tests()
@@ -94,6 +94,8 @@ def run_test(self):
         if self.is_specified_wallet_compiled() and not self.options.descriptors:
             self.import_deterministic_coinbase_privkeys()
             self.raw_multisig_transaction_legacy_tests()
+        self.getrawtransaction_verbosity_tests()
+
 
     def getrawtransaction_tests(self):
         tx = self.wallet.send_self_transfer(from_node=self.nodes[0])
@@ -243,6 +245,13 @@ def getrawtransaction_verbosity_tests(self):
         coin_base = self.nodes[1].getblock(block1)['tx'][0]
         gottx = self.nodes[1].getrawtransaction(txid=coin_base, verbosity=2, blockhash=block1)
         assert 'fee' not in gottx
+        # check that verbosity 2 for a mempool tx will fallback to verbosity 1
+        # Do this with a pruned chain, as a regression test for https://github.com/bitcoin/bitcoin/pull/29003
+        self.generate(self.nodes[2], 400)
+        assert_greater_than(self.nodes[2].pruneblockchain(250), 0)
+        mempool_tx = self.wallet.send_self_transfer(from_node=self.nodes[2])['txid']
+        gottx = self.nodes[2].getrawtransaction(txid=mempool_tx, verbosity=2)
+        assert 'fee' not in gottx
 
     def createrawtransaction_tests(self):
         self.log.info("Test createrawtransaction")