This bug is reported by nelsonb@netscape.com. (See bug #31674.) The current emulated implementation of PR_AcceptRead aligns PRNetAddr on the size of void*. (See _PR_EmulateAcceptRead in prsocket.c and pt_AcceptRead in ptio.c.) The idea is that the alignment of void* is the most stringent. However, this assumption is incorrect. For example, on 32-bit IRIX (N32 ABI), the size of void* is 4, but the 64-bit long long type must be aligned on 8 byte boundaries. Starting in NSPR 4.0, PRNetAddr contains PRUint64, so it must be aligned according to PRUint64. To simplify things we can just align PRNetAddr on 8-byte boundaries, which may be more than necessary but is always correct.

Checked in the fix. /cvsroot/mozilla/nsprpub/pr/src/io/prsocket.c, revision 3.29 /cvsroot/mozilla/nsprpub/pr/src/pthreads/ptio.c, revision 3.48