From the build log with --cores=1 checking guile testcase template_whitespace checking guile testcase threads checking guile testcase threads_exception checking guile testcase throw_exception (with run test) free(): invalid pointer /gnu/store/3dzvi613nf3fz42rabksw6svslvanfz7-bash-minimal-4.4.23/bin/sh: line 1: 21784 Aborted (core dumped) env GUILE_AUTO_COMPILE=0 LD_LIBRARY_PATH=.:$LD_LIBRARY_PATH /gnu/store/7pb9ywfzvr8jwgykpj52vfd8d6kimc3w-guile-2.0.14/bin/guile -l . /throw_exception_runme.scm make[1]: *** [Makefile:36: throw_exception.cpptest] Error 134 checking guile testcase typedef_array_member checking guile testcase typedef_class checking guile testcase typedef_funcptr checking guile testcase typedef_inherit (with run test) checking guile testcase typedef_mptr I don't see anything upstream about this, so I figured I'd post it here first. This happens with and without the fix-swig-for-i686 patch. -- Efraim Flashner אפרים פלשנר GPG key = A28B F40C 3E55 1372 662D 14F7 41AA E7DC CA3D 8351 Confidentiality cannot be guaranteed on emails sent or received unencrypted