Eagerly close tempfile to fix #1082 #1555

Job	Run time
Test CUDA support	57s
Clippy	23s
MSRV (ubuntu-latest)	21s
Test build-std (aarch64-tvos)	1m 25s
MSRV (windows-latest)	38s
Rustfmt	5s
Test build-std (aarch64-tvos-sim)	1m 40s
semver-checks	30s
Test build-std (x86_64-tvos)	1m 39s
Test (stable)	26s
Test (beta)	31s
Test (nightly)	25s
Test (linux32)	1m 7s
Test (macos)	2m 22s
Test (aarch64-macos)	1m 14s
Test (aarch64-ios)	40s
Test (win32)	1m 9s
Test (win64)	3m 22s
Test (mingw32)	1m 23s
Test (mingw64)	1m 41s
Test (windows-2019)	2m 30s
Test (windows-aarch64, windows-latest, stable, aarch64-pc-windows-msvc, --no-run)	2m 9s
Test (windows-clang, windows-2019, stable, x86_64-pc-windows-msvc, clang, clang++)	2m 2s
Test (windows-clang-cl, windows-2019, stable, x86_64-pc-windows-msvc, clang-cl, clang-cl)	1m 53s
	30m 32s

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