Rust

xtask: improved error output for "wrong" repr #7301

Job	Run time
Integration Test (x86_64)	1m 43s
Integration Test (x86_64 Windows)	2m 47s
Unit + Doc Tests	48s
Build (stable MSRV)	1m 47s
Test Coverage	44s
Integration Test (IA-32)	1m 29s
Build (feature permutations)	4m 23s
Build (uefi-raw MSRV)	44s
Nightly (build, test, doc)	2m 10s
Unit + Doc Tests (Miri)	1m 33s
Integration Test (AArch64)	2m 11s
Build Standard Binary (nightly)	27s
	20m 46s

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