The attached example code exhibits a segfault on x86 when compiled with
"-O3 --fomit-frame-pointer". This is the binary gdc downloaded from the
web.
% gdc --version
gdc (GCC) 4.1.2 20070214 ( (gdc 0.24, using dmd 1.020))
...
% gdc -o bug -O3 bug.d
% ./bug
10,240kB
% gdc -o bug -O3 -fomit-frame-pointer bug.d
% ./bug
Segmentation fault
% gdc -g -o bug -O3 -fomit-frame-pointer bug.d
% gdb ./bug
(gdb) run
Starting program: /home/davidb/wd/adump/2.1/bug/bug
warning: Lowest section in system-supplied DSO at 0xffffe000 is .hash at
ffffe0b4
[Thread debugging using libthread_db enabled]
[New Thread -136127808 (LWP 14962)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -136127808 (LWP 14962)]
_D3bug10formatSizeFlZAa (size=578398486928556032) at bug.d:9
9 foreach (ind, ch; text.reverse) {
Current language: auto; currently minimal
The example works fine on x86_64.
Comment #1 by dlang — 2007-10-07T21:51:39Z
Created attachment 189
Demonstration of compilation bug.