## gdb session [plain_text]
Program terminated with signal 11, Segmentation fault.
[New process 24004]
#0  strlen () at ../sysdeps/i386/i486/strlen.S:69
69      ../sysdeps/i386/i486/strlen.S: No such file or directory.
        in ../sysdeps/i386/i486/strlen.S
(gdb) bt
#0  strlen () at ../sysdeps/i386/i486/strlen.S:69
#1  0x0809886b in PyString_FromFormatV (format=0xb79eb554 "the sip module implements API v%d.0 but the %s module requires API v%d.%d", vargs=0xbfa0e9b8 "\004") at ../Objects/stringobject.c:211
#2  0x080dce3b in PyErr_Format (exception=0x8144c40, format=0xb79eb554 "the sip module implements API v%d.0 but the %s module requires API v%d.%d") at ../Python/errors.c:522
...

## stringobject.c
            case 's':
                s = va_arg(count, char*);
                n += strlen(s); # <-- this fails
                break;