Bug#865549: cargo still segfaults / rustc still FTBFS with the newest fixed kernel

From	Ximin Luo <infinity0@debian.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#865549: cargo still segfaults / rustc still FTBFS with the newest fixed kernel
Date	2017-06-29 17:20 +0200
Message-ID	<tXJoC-LR-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Control: unmerge 866185
Control: unmerge 865549
Control: forcemerge 865549 866185
Control: notfixed linux/4.11.6-1

Unfortunately I spoke too soon, the patch does not work. I had been testing with `cargo -V` and the segfault on this is now fixed by the patch, but `cargo build` still segfaults. More details in https://github.com/rust-lang/cargo/issues/4197

Disabling ASLR or setting `ulimit -s 24576` works around the segfault.

I am still fairly certain the issue is a kernel problem, because before June 20 I had built these things 5 times successfully on Debian buildds and more times on porterboxes:

https://buildd.debian.org/status/logs.php?pkg=rustc see versions 1.17.0+dfsg2-1 to 1.17.0+dfsg2-5

Some help would be appreciated as I have no idea how to debug these types of low-level situations. I'll try to step through the program at least and send the output of that here.

X

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Bug#865549: cargo still segfaults / rustc still FTBFS with the newest fixed kernel Ximin Luo <infinity0@debian.org> - 2017-06-29 17:20 +0200
  Bug#865549: [Pkg-rust-maintainers] cargo still segfaults / rustc still FTBFS with the newest fixed kernel Ximin Luo <infinity0@debian.org> - 2017-06-29 17:30 +0200
  Bug#865549: [Pkg-rust-maintainers] cargo still segfaults / rustc still FTBFS with the newest fixed kernel Ximin Luo <infinity0@debian.org> - 2017-06-29 19:50 +0200
    Bug#865549: [Pkg-rust-maintainers] cargo still segfaults / rustc still FTBFS with the newest fixed kernel Ben Hutchings <ben@decadent.org.uk> - 2017-06-30 00:40 +0200
      Bug#865549: [Pkg-rust-maintainers] Bug#865549: cargo still segfaults / rustc still FTBFS with the newest fixed kernel Ximin Luo <infinity0@debian.org> - 2017-06-30 11:10 +0200

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