Noting that this bug is NOT triggered when compiling with -O.
Compiling both with -O (tested first) and without -O (tested if -O does not generate a crash) to find crashes regardless of compiler options.
Updated example output and hall of fame :-)
Compile under -Onone, -O and -Ounchecked to find optimization level
dependent crashes.
Test case for a crash when using void map over a sequence