I found that the probe sometimes gets an EPIPE when writing input to the child process. In this particular test scenario, the dummy /bin/true wrapper may exit too quickly, closing its stdin before we had a chance to write anything (which it wasn't going to look at anyway).
I don't think it's wrong for the library to consider that a failed probe, but I'd like to make the test more robust.
This assertion occasionally fails: https://github.com/cuviper/autocfg/blob/c10bc170ca6cc8176b046dce8d7e73e8b24f6d76/tests/wrappers.rs#L45-L50
I found that the probe sometimes gets an
EPIPEwhen writing input to the child process. In this particular test scenario, the dummy/bin/truewrapper may exit too quickly, closing itsstdinbefore we had a chance to write anything (which it wasn't going to look at anyway).I don't think it's wrong for the library to consider that a failed probe, but I'd like to make the test more robust.