Re: btrfs-progs v3.14 mkfs.btrfs bug: --features long-option segfaults, -O short-option OK

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On Wed, 16 Apr 2014 06:41:44 +0000, Duncan wrote:

> Using btrfs-progs v3.14:
> 
> mkfs.btrfs ... --features ...
> 
> segfaults.

Can reproduce (also with glibc 2.19 on Gentoo ;-) and building with debug
found:

(gdb) bt
#0  0x00007ffff6f3aaea in strlen () from /lib64/libc.so.6
#1  0x00007ffff6f3a82e in strdup () from /lib64/libc.so.6
#2  0x00000000004213e8 in main (ac=2, av=0x7fffffffe308) at mkfs.c:1312

Sure enough that line is handling 'O', where '--features' is supposed to
be handled. No idea why -O works, but debugging shows that optarg is null
at that point, so strdup goes poof.

-h

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