Valgrind false positive or?

[Dan Kegel]

Vitaliy wrote:

>==22938== Invalid write of size 1
>==22938==    at 0x4024D55: memcpy (mc_replace_strmem.c:402)
>==22938==    by 0x7BC64405: setup_exception_record (signal_i386.c:795)
>==22938==    by 0x7BC65793: segv_handler (signal_i386.c:1310)

What test was this?  Sometimes a little more context helps.