Merge pull request #6417 from IntersectMBO/defensive-mempool #31637

Job	Run time
build (3.12, 9.6, macos-latest, bash)	55m 49s
build (9.6, 3.12, ubuntu-latest, bash)	41m 24s
build (9.6, 3.12, windows-latest, C:/msys64/usr/bin/bash.exe -e {0})	35m 35s
build (9.12, 3.12, windows-latest, C:/msys64/usr/bin/bash.exe -e {0})	35m 32s
build (9.12, 3.12, ubuntu-latest, bash)	39m 31s
build-complete	2s
release	0s
	3h 27m 53s

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