$ 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.