grcov panics when using LLVM flag about grcov HOT 12 CLOSED

Could you test again with current master?

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Which version of grcov are you testing?
There might be a bug in the master branch that I haven't had time to debug yet.

Could you also upload here the gcda/gcno files in a ZIP?

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There might be a bug in the master branch that I haven't had time to debug yet.

Sorry, I meant 0.1.29. Could you test 0.1.28?

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I am using 0.1.29, will try out 0.1.28.

Update: tried with 0.1.28 as well, and that also failed. Similar panic on a bad unwrap().

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Here are the gcda/gcno files, with a text file of the generated error: grcov-llvm-panic.zip

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@lght the archive is empty :)

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derp, here is a second attempt:
grcov-llvm-panic.zip

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The gcno files in the archive seem to be invalid, as they can't be parsed with llvm-cov. Maybe try uploading them on another service and then put the link here?

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Anyway, I've managed to reproduce the error, so I don't need them anymore. Thanks for the report!

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I think there's an underlying issue with the mangling of the symbol. I can implement a workaround in grcov, but we should fix this in Rust.

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Ok, is the symbol mangling fix something internal in Rust or something in ~~~cargo-cov~~~ grcov? (originally thought these projects were meant to be used together, until I saw your conversation in a cargo-cov issue)

Not aware of how Rust is doing the mangling, is this part of -Zprofiling? Brand new to the tooling, but happy to help if I can.

Anyway, I've managed to reproduce the error, so I don't need them anymore. Thanks for the report!

Apologies for not responding sooner, glad it worked out. Thanks for grcov :)

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Tested again with master, and your latest commit fixed the panic. Thank you much :)

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