Fix miri validation errors through now stricter provenance #250

Job	Run time
Test MSRV	3m 26s
Test MSRV (--no-default-features)	3m 34s
Clippy (stable)	24s
Miri	1m 32s
Test MSRV (--features track-caller)	3m 25s
Check (stable)	7s
Test MSRV (--features auto-install)	3m 29s
Test Suite Matrix (stable)	49s
Test Platform Matrix (ubuntu-latest)	45s
Rustfmt (stable)	5s
Test Suite Matrix (stable, --no-default-features)	53s
Test Platform Matrix (windows-latest)	1m 33s
Test Suite Matrix (stable, --features track-caller)	59s
Test Platform Matrix (macOS-latest)	1m 0s
Test Suite Matrix (stable, --features pyo3)	1m 3s
Test Suite Matrix (stable, --features auto-install)	46s
Test Suite Matrix (stable, --all-features)	52s
Test Suite Matrix (beta)	55s
Test Suite Matrix (beta, --no-default-features)	47s
Test Suite Matrix (beta, --features track-caller)	1m 6s
Test Suite Matrix (beta, --features pyo3)	48s
Test Suite Matrix (beta, --features auto-install)	50s
Test Suite Matrix (beta, --all-features)	44s
Test Suite Matrix (nightly)	1m 5s
Test Suite Matrix (nightly, --no-default-features)	58s
Test Suite Matrix (nightly, --features track-caller)	1m 0s
Test Suite Matrix (nightly, --features pyo3)	1m 7s
Test Suite Matrix (nightly, --features auto-install)	1m 12s
Test Suite Matrix (nightly, --all-features)	1m 3s
	36m 17s

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