target_ast_segv.pl

froggs@TL02L-R8RXTCW-linux:~/dev/nqp$ gdb --args install/bin/moar nqp.moarvm --target=ast -e 'my $line := ""; my @parts := match($line, /T+/, :global);'
GNU gdb (GDB) 7.5.91.20130417-cvs-ubuntu
Copyright (C) 2013 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/froggs/dev/nqp/install/bin/moar...done.
(gdb) run
Starting program: /home/froggs/dev/nqp/install/bin/moar nqp.moarvm --target=ast -e my\ \$line\ :=\ \"\"\;\ my\ @parts\ :=\ match\(\$line,\ /T+/,\ :global\)\;
warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7ffff7ffa000
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x000000000043614a in MVM_string_concatenate (tc=0x829310, a=0x7ffff6fcec98, b=0x0) at src/strings/ops.c:413
413	    MVMStringIndex agraphs = NUM_GRAPHS(a), bgraphs = NUM_GRAPHS(b), rgraphs;
(gdb) bt full
#0  0x000000000043614a in MVM_string_concatenate (tc=0x829310, a=0x7ffff6fcec98, b=0x0) at src/strings/ops.c:413
        result = 0x829310
        strand_count = 0
        strands = 0x1c0
        index = 0
        max_strand_depth = 0
        agraphs = 12
        bgraphs = 140737336251600
        rgraphs = 140737336251640
#1  0x000000000044cd8f in MVM_interp_run (tc=0x829310, initial_invoke=0x441cb8 <toplevel_initial_invoke>, invoke_data=0x955b50) at src/core/interp.c:1263
        op = 184
        cur_op = 0x7ffff6dd3a9c "\003"
        bytecode_start = 0x7ffff6dd3956 "`"
        reg_base = 0x15ed460
        cu = 0x7ffff6ef0ff8
        cur_callsite = 0xbafac0
#2  0x0000000000441dd6 in MVM_vm_run_file (instance=0x829010, filename=0x7fffffffe36a "nqp.moarvm") at src/moar.c:132
        start_frame = 0x955b50
        tc = 0x829310
        cu = 0x7ffff6ee9d58
#3  0x000000000040433d in main (argc=5, argv=0x7fffffffe048) at src/main.c:130
        instance = 0x829010
        input_file = 0x7fffffffe36a "nqp.moarvm"
        lib_path = 0x0
        dump = 0
        argi = 2
        flag = -2