I wrote a module that erraneously contained two functions
with the same name. When I tried to start the interpreter
it crashed, trying to print the error message:

kk@boss ~/Source/php3 $ ./php
Content-type: text/html

<Segmentation Fault (core dumped)
(gdb) kk@boss ~/Source/php3 $ gdb php
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(gdb) run
Starting program: /home/kk/Source/php3/php
[New LWP    2        ]
[New LWP    3        ]
[New LWP    4        ]
Content-type: text/html


Program received signal SIGSEGV, Segmentation fault.
0xff036d04 in strlen () from /usr/lib/libc.so.1
(gdb) bt
#0  0xff036d04 in strlen () from /usr/lib/libc.so.1
#1  0xff07eeb8 in _doprnt () from /usr/lib/libc.so.1
#2  0xff080c54 in vfprintf () from /usr/lib/libc.so.1
#3  0x304a4 in php3_printf (
    format=0x82488 "<br>\n<b>%s</b>:  %s in <b>%s</b> on line <b>%d</b><br>\n")
    at main.c:322
#4  0x306e8 in php3_error (type=32,
    format=0x83c80 "Module load failed - duplicate function name - %s")
    at main.c:399
#5  0x399a0 in register_functions (functions=0x9f6f4)
    at internal_functions.c:591
#6  0x39a60 in register_module (module=0x9f844) at internal_functions.c:631
#7  0x39848 in module_startup_modules () at internal_functions.c:535
#8  0x31a4c in php3_module_startup () at main.c:1252
#9  0x32640 in main (argc=1, argv=0xffbefb24) at main.c:1762