For some reason it core dumps when used in a CGI script (I have the examples). The same scripts works great on Solaris, but crashes on Linux with this stack: (gdb) bt #0 0x400911ad in chunk_alloc (ar_ptr=0x400e6420, nb=24) at malloc.c:2616 #1 0x400910c5 in __libc_malloc (bytes=19) at malloc.c:2561 #2 0x808cdde in Perl_safemalloc (size=19) at util.c:89 #3 0x809687f in save_hek (str=0xbffff95c "_<(eval 9)", len=10, hash=812736109) at hv.c:72 #4 0x8098f47 in Perl_share_hek (str=0xbffff95c "_<(eval 9)", len=10, hash=812736109) at hv.c:1209 #5 0x8096f89 in Perl_hv_store (hv=0x80fd36c, key=0xbffff95c "_<(eval 9)", klen=10, val=0x828d4a4, hash=812736109) at hv.c:328 #6 0x8096aa6 in Perl_hv_fetch (hv=0x80fd36c, key=0xbffff95c "_<(eval 9)", klen=10, lval=1) at hv.c:161 #7 0x805dcb6 in Perl_gv_fetchfile (name=0xbffffa86 "(eval 9)") at gv.c:69 #8 0x80d0811 in Perl_pp_entereval (thr=0x80fcf40) at pp_ctl.c:2648 #9 0x80eb330 in Perl_runops_standard () at run.c:30 #10 0x80594ff in perl_run (sv_interp=0x80fcf30) at perl.c:1088 #11 0x805670f in main (argc=3, argv=0xbffffbb4, env=0xbffffbc4) at perlmain.c:45 (gdb) This has me really stumped...

*** Bug 11106 has been marked as a duplicate of this bug. ***

This was fixed with the API.xs.