https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70393
Bug ID: 70393
Summary: Miscompilation: missing constructor call for static
object
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: js at alien8 dot de
Target Milestone: ---
Created attachment 38078
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38078&action=edit
Testcase
For the attached testcase, g++ on Linux miscompiles and there is no constructor
called for the static object. That results in the vtable being 0 and the
program segfaulting. clang compiles this without problem.
% g++ --version
g++ (GCC) 5.3.1 20151207 (Red Hat 5.3.1-2)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
To reproduce do the following:
% g++ -std=c++11 -o testcase testcase.cpp
% ./testcase
set_element() on B @ 0x602070
call_element() on B @ 0x602070
zsh: segmentation fault (core dumped) ./testcase
Expected output is this:
% clang++ -std=c++11 -o testcase testcase.cpp
% ./testcase
set_element() on B @ 0x602068
call_element() on B @ 0x602068
vfunc() on AB @ 0x602068
