Fix miri validation errors through now stricter provenance #251

Job	Run time
Miri	1m 20s
Rustfmt (stable)	7s
Check (stable)	10s
Clippy (stable)	11s
Test Suite Matrix (stable)	38s
Test Suite	3m 27s
Test Suite (ubuntu-latest)	53s
Test Suite Matrix (stable, --no-default-features)	46s
Test Suite (--no-default-features)	3m 33s
Test Suite (windows-latest)	2m 12s
Test Suite Matrix (stable, --features track-caller)	44s
Test Suite (--features track-caller)	3m 24s
Test Suite (macOS-latest)	1m 4s
Test Suite Matrix (stable, --features pyo3)	46s
Test Suite (--features auto-install)	3m 27s
Test Suite Matrix (stable, --features auto-install)	40s
Test Suite Matrix (stable, --all-features)	40s
Test Suite Matrix (beta)	50s
Test Suite Matrix (beta, --no-default-features)	48s
Test Suite Matrix (beta, --features track-caller)	1m 2s
Test Suite Matrix (beta, --features pyo3)	49s
Test Suite Matrix (beta, --features auto-install)	51s
Test Suite Matrix (beta, --all-features)	48s
Test Suite Matrix (nightly)	1m 11s
Test Suite Matrix (nightly, --no-default-features)	1m 1s
Test Suite Matrix (nightly, --features track-caller)	59s
Test Suite Matrix (nightly, --features pyo3)	58s
Test Suite Matrix (nightly, --features auto-install)	59s
Test Suite Matrix (nightly, --all-features)	1m 0s
	35m 18s

Provide feedback