GCC 5.3.0: ASAN gives "unknown-crash" error

[Paul Smith]

On Sun, 2016-01-10 at 22:04 -0500, Paul Smith wrote:
> ==7750==ERROR: AddressSanitizer: unknown-crash on address
> 0x7f8522ce3850 
>   at pc 0x0000008a3784 bp 0x7fff20876dd0 sp 0x7fff20876dc8
>   WRITE of size 800008 at 0x7f8522ce3850 thread T0

FWIW I just rebuilt my code with the system compiler that comes with my
system (Ubuntu GNOME 15.10), "gcc (Ubuntu 5.2.1-22ubuntu2) 5.2.1
20151010" and I see identical behavior to this there as well.