$ pear install http_request2
Segmentation fault (core dumped)

$ gdb /usr/bin/php
(gdb) run /usr/share/php/pearcmd.php install http_request2
Starting program: /usr/bin/php /usr/share/php/pearcmd.php install http_request2
During startup program terminated with signal SIGSEGV, Segmentation fault.
(gdb) bt
No stack.

$ pear version
PEAR Version: 1.10.0dev1
PHP Version: 5.6.9-0+deb8u1
Zend Engine Version: 2.6.0
Running on: Linux 2d5572aabb95 3.13.0-57-generic #95-Ubuntu SMP Fri Jun 19 09:28:15 UTC 2015 x86_64