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rust-lang / cargo

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https://doc.rust-lang.org/cargo
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`#[cfg(not(test))]` does not work #14768

Open xmh0511 opened 5 days ago

xmh0511 commented 5 days ago

Problem

In the lib.rs file

#[cfg(not(test))]
compile_error!{"report error"}

This does not work when running cargo test. It still emits the compile error in this case.

Steps

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Possible Solution(s)

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Notes

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Version

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ehuss commented 5 days ago

Thanks for the report! This is intended behavior when running cargo test. What happens is that the library is built three times. Once as a unittest, and once as a library, and once as a doctest. Only the unittest copy gets test set. The others do not, as they are intended to be built as-if they are part of a normal build.