Problem in cmsutil in nss 3.3

[Uriel Ginsburg]

There is an assertion failure when freeing an arena in cmsutil, when signing
a message.
The following is the code section responsible for the arena:

if (mode == SIGN || mode == ENVELOPE || mode == CERTSONLY) {
    PLArenaPool *arena = PORT_NewArena(1024);
    ...
    ...
    PORT_FreeArena(arena, PR_FALSE);
}

The assertion that fails is in FreeArenaList():

#ifdef DEBUG
    do {
        PR_ASSERT(a->base <= a->avail && a->avail <= a->limit);
        a->avail = a->base;
        PL_CLEAR_UNUSED(a);
    } while ((a = a->next) != 0);
    a = *ap;
#endif


I wanted to know whether this is a known bug, or should I check whether I
used the wrong RTL or something... this bug occures after having built nss
from scratch, without any code intervention whatsoever, and has risen up
while I was running the test suite.

Thanks,
Uriel Ginsburg