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bug#22136: [osx] core dump while building emacs-25

From: Alex Dunn
Subject: bug#22136: [osx] core dump while building emacs-25
Date: Wed, 09 Dec 2015 20:20:44 -0800
User-agent: Notmuch/0.21 (http://notmuchmail.org) Emacs/ (x86_64-apple-darwin15.2.0)

`make -C ../lisp update-subdirs` on the emacs-25 branch has been
reliably causing a core dump the past two or three days.  Here are the
build logs: https://gist.github.com/dunn/ff087e9b533d373ab10b#file-03-make-L568

It doesn’t cause the build to fail (except for when I made some changes
to the source tree that I can’t reproduce; logs here if anyone’s
https://gist.github.com/dunn/43f10877f11c97ab28f0#file-03-make-L291) so
I don’t know how serious an issue this is.  It occurs with -j1 and -j4,
with Clang and with GCC 5.3.0.

System config included in the logs, but for the sake of convenience:

CPU: quad-core 64-bit haswell
OS X: 10.11.2-x86_64
Xcode: 7.1.1

🌲  clang -v
Apple LLVM version 7.0.0 (clang-700.1.76)
Target: x86_64-apple-darwin15.2.0
Thread model: posix

🌲  gcc-5 -v
Using built-in specs.
Target: x86_64-apple-darwin15.0.0
Configured with: ../configure --build=x86_64-apple-darwin15.0.0 
--enable-languages=c,c++,objc,obj-c++,fortran --program-suffix=-5 
--with-gmp=/usr/local/opt/gmp --with-mpfr=/usr/local/opt/mpfr 
--with-mpc=/usr/local/opt/libmpc --with-isl=/usr/local/opt/isl 
--with-system-zlib --enable-libstdcxx-time=yes --enable-stage1-checking 
--enable-checking=release --enable-lto --with-build-config=bootstrap-debug 
--disable-werror --with-pkgversion='Homebrew gcc 5.3.0' 
--with-bugurl=https://github.com/Homebrew/homebrew/issues --enable-plugin 
--disable-nls --enable-multilib
Thread model: posix
gcc version 5.3.0 (Homebrew gcc 5.3.0)

If there’s any necessary information I’m forgetting please let me know.

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