While writing my own portable opendir/readdir/closedir functions for DOS,
32-bit Windows and OS/2 programs I came across a bug with EMX 0.9d, causing
it to segfault:

#include 
#include 

int main(void)
{
    opendir("/");
    return 0;
}

process 3 get hardware fault 13 (general protection) at 104C4

Program received signal SIGSEGV, Segmentation fault.
0x104c4 in _trslash ()
(gdb) bt
#0  0x104c4 in _trslash ()
#1  0x10203 in _opendir ()
#2  0x1004e in main () at emxbug.c:6
 
--- timEd/Cygwin 1.11.a1