mysqld segfaults on FreeBSD 10.1 i386 when built with clang 3.4

From: spil.oss@gmail.com
To: maria-developers@lists.launchpad.net
subject: mysqld 10.0.15 segfaults on FreeBSD i386 clang 3.4

>Description:
When MariaDB is built with clang 3.4 on FreeBSD i386 (which is
the default compiler) the server will segfault the moment a
client connects to it. Same behaviour is observed with clang
3.5. Built with clang 3.3 on 10.1 runs without segfaults.
Built on FreeBSD 10.0 (which comes with clang 3.3) runs OK.
>How-To-Repeat:
Use FreeBSD 10.1 i386
Use port to build MariaDB 10.0 or 5.5
Connect to server using client

>Fix:
Build with clang 3.3 or build using Pourdiere (uses 10.0 jail)

>Submitter-Id: <submitter ID>
>Originator: Bernard Spil
>Organization:
FreeBSD MariaDB 10.0 port committer
>MySQL support: none
>Synopsis: MariaDB segfaults on i386 FreeBSD
>Severity: non-critical
>Priority: low
>Category: mysql
>Class: sw-bug
>Release: mysql-10.0.15 (FreeBSD Ports)

>C compiler: clang 3.4
>C++ compiler: clang 3.4
>Environment:
FreeBSD 10.1 GENERIC i386 Celeron U4100 Dual Core 4GB
System: FreeBSD i386bsd 10.1-RELEASE FreeBSD 10.1-RELEASE #0 r274401: Tue Nov 11 22:51:51 UTC 2014 root@releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC i386

Some paths: /usr/bin/perl /usr/bin/make /usr/local/bin/gmake /usr/bin/cc

Compilation info (call): CC='/usr/bin/cc' CFLAGS='-O2 -pipe -fstack-protector -fno-strict-aliasing -O2 -g -DNDEBUG -DDBUG_OFF' CXX='/usr/bin/c++' CXXFLAGS='-O2 -pipe -fstack-protector -fno-strict-aliasing -O2 -g -DNDEBUG -DDBUG_O
FF' LDFLAGS='' ASFLAGS=''
Compilation info (used): CC='/usr/bin/cc' CFLAGS='-O2 -pipe -fstack-protector -fno-strict-aliasing -O2 -g -DNDEBUG -DDBUG_OFF' CXX='/usr/bin/c++' CXXFLAGS='-O2 -pipe -fstack-protector -fno-strict-aliasing -O2 -g -DNDEBUG -DDBUG_O
FF' LDFLAGS='' ASFLAGS=''
LIBC:
rrr- 1 root wheel 1427444 Nov 11 23:52 /lib/libc.so.7
rrr- 1 root wheel 2833712 Nov 11 23:52 /usr/lib/libc.a
rrr- 1 root wheel 166 Nov 11 23:52 /usr/lib/libc.so

Perl: This is perl 5, version 18, subversion 4 (v5.18.4) built for i386-freebsd-thread-multi-64int