Package: libpython2.7 Version: 2.7.9-2 Severity: normal Dear Maintainer,
Linking applications with the Python runtime on ARM-based (both v7 and v8) systems sometimes results in the following fatal error at application startup: $ ./test0 Fatal Python error: exceptions bootstrapping error. Aborted See below for the test cases that reproduces the problem. The expected behavior is that the test cases returns without printing anything on the console. The problem seems to be caused by a Debian-specific patch, link-opt.diff, that enables the -Bsymbolic-functions linker optimizations. There are plenty of cases where the runtime needs to compare function pointers, for example compatible_for_assignment() in typeobject.c. When the offending linker optimization is enabled, the same function has two different pointers depending on where the pointer address was resolved. In some cases, the pointer will point directly to the function's entry point. In some other cases, it points to a linker table entry. This causes checks that test for function pointer equivalence, like the ones in typeobject.c, to fail. Note: This could be affected/triggered by the following two binutils issues that affect the behavior of said linker optimization several platforms (including ARM): https://sourceware.org/ml/binutils/2015-01/msg00246.html https://sourceware.org/ml/binutils/2015-07/msg00282.html ** BEGIN test0.c ** /* gcc -o test0 `python-config --libs --cflags` test0.c */ #include <Python.h> void (*foo)(void *) = &PyObject_Free; int main(int argc, char *argv[]) { Py_Initialize(); Py_Finalize(); return 0; } ** END test0.c ** -- System Information: Debian Release: 8.2 APT prefers stable APT policy: (500, 'stable') Architecture: arm64 (aarch64) Kernel: Linux 3.18.1 (SMP w/8 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages libpython2.7 depends on: ii libc6 2.19-18+deb8u1 ii libpython2.7-stdlib 2.7.9-2 ii multiarch-support 2.19-18+deb8u1 ii zlib1g 1:1.2.8.dfsg-2+b1 libpython2.7 recommends no packages. libpython2.7 suggests no packages. -- no debconf information
