Fix support for trybuild 1.0.76+ #2054

Job	Run time
miri	1m 58s
build (aarch64-unknown-linux-gnu)	2m 59s
build (aarch64-unknown-linux-musl)	2m 11s
build (aarch64-apple-darwin)	2m 40s
build (x86_64-unknown-linux-gnu)	1m 57s
build (x86_64-unknown-linux-musl)	2m 25s
build (x86_64-apple-darwin)	2m 31s
build (x86_64-pc-windows-msvc)	4m 35s
test (stable)	3m 27s
test (beta)	4m 19s
test (nightly)	5m 4s
test (nightly, macos-11)	5m 14s
test (nightly, windows-2019)	7m 3s
msrv / msrv	3m 39s
deny / deny	17s
tidy / tidy	1m 10s
	51m 29s

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