Segfaults when compiling with more memory

[John Klos <john%ziaspace.com@localhost>]

Compiling Perl 5.30.3 on VAX (netbsd-9 with Kalvis Duckmanton's 
patches) on SIMH configured with 256 megs of memory fails as shown below, 
but succeeds with 128 megs of memory and on a real VAXstation with 24 megs 
of memory (and lots of swap).

Any ideas, anyone?

gcc -c -DPERL_CORE -O2 -D_FORTIFY_SOURCE=2 -pthread -I/usr/include -fwrapv
-fno-strict-aliasing -pipe -I/usr/pkg/include -O2 -D_FORTIFY_SOURCE=2
-pthread -I/usr/include -Wall -Werror=declaration-after-statement
-Werror=pointer-arith -Wextra -Wc++-compat -Wwrite-strings -DPIC -fPIC
regexec.c regexec.c: In function 'S_reginclass': regexec.c:10055:1:
internal compiler error: Segmentation fault
 }
 ^
no stack trace because unwind library not available
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://www.NetBSD.org/support/send-pr.html> for instructions.
*** Error code 1