http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59433
--- Comment #5 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> --- It seems this is a 32-bit issue: the failure is very fragile to reproduce: I easily get it if running manually or under gdb, but it vanishes if run under truss. Adding assertions in runtime_netpoll to check how prfds turns NULL, I find that runtime_SysAlloc indeed returns NULL, but similar assertions there don't show that. Investigating the SEGV with pmap, I find this: 14198: /var/gcc/regression/trunk/11-gcc/build/i386-pc-solaris2.11/libgo/log-s 08050000 48K r-x-- /var/gcc/regression/trunk/11-gcc/build/i386-pc-solaris2.11/libgo/log-syslog-check/test/a.out 0806B000 12K rwx-- /var/gcc/regression/trunk/11-gcc/build/i386-pc-solaris2.11/libgo/log-syslog-check/test/a.out 0806E000 8K rwx-- [ heap ] 08080000 4K rw--- [ anon ] 08090000 4K rw--- [ anon ] and many many more anon mappings, too many for the 32-bit address space, it seems. Perhaps a missing munmap somewhere? Rainer