[bug-gawk] *** glibc detected *** awk: double free or corruption (fasttop): 0x0000000001b32710 ***

[Hermann Peifer]

I just ran into the below problem, using gawk/master on GNU/Linux. Hermann

# So far, so good
$ awk 'BEGIN{x=@/abc/; print typeof(x)}'
regexp

# This makes awk die
$ awk 'BEGIN{x=@/abc/; print typeof(x); print x}'
regexp
*** glibc detected *** awk: double free or corruption (fasttop): 
0x0000000001b32710 ***
======= Backtrace: =========
/lib/libc.so.6(+0x71e16)[0x7f1ccad23e16]
/lib/libc.so.6(cfree+0x6c)[0x7f1ccad28b8c]
awk(r_unref+0x49)[0x464529]
awk(do_print+0x267)[0x41c9a7]
awk(r_interpret+0x181b)[0x44451b]
awk(main+0x1339)[0x45eaa9]
/lib/libc.so.6(__libc_start_main+0xfd)[0x7f1ccacd0c8d]
awk[0x40cd29]
======= Memory map: ========
(...)
▒&▒Aborted
$