BT for S04-phasers/first.t SEGV

gistfile1.txt

davidw@app01:~/git/roast$ gdb /home/davidw/git/rakudo/install/bin/moar
GNU gdb (GDB) 7.0.1-debian
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/davidw/git/rakudo/install/bin/moar...(no debugging symbols found)...done.
(gdb) run --libpath="/home/davidw/git/rakudo/install/languages/nqp/lib" --libpath="/home/davidw/git/rakudo/install/languages/perl6/lib" --libpath="/home/davidw/git/rakudo/install/languages/perl6/runtime" /home/davidw/git/rakudo/install/languages/perl6/runtime/perl6.moarvm S04-phasers/first.t
Starting program: /home/davidw/git/rakudo/install/bin/moar --libpath="/home/davidw/git/rakudo/install/languages/nqp/lib" --libpath="/home/davidw/git/rakudo/install/languages/perl6/lib" --libpath="/home/davidw/git/rakudo/install/languages/perl6/runtime" /home/davidw/git/rakudo/install/languages/perl6/runtime/perl6.moarvm S04-phasers/first.t
[Thread debugging using libthread_db enabled]
1..4
ok 1 - FIRST only ran once
ok 2 - FIRST {} ran before the loop body

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff79ad2d4 in MVM_interp_run () from /home/davidw/git/rakudo/install/lib/libmoar.so
(gdb) bt
#0  0x00007ffff79ad2d4 in MVM_interp_run () from /home/davidw/git/rakudo/install/lib/libmoar.so
#1  0x00007ffff7a108e3 in MVM_vm_run_file () from /home/davidw/git/rakudo/install/lib/libmoar.so
#2  0x0000000000400c56 in main ()
(gdb) quit

'no debugging symbols found' -- hmm