profiling.t failure

gistfile1.txt

$ prove --verbose t/profiling/profiling.t
t/profiling/profiling....1..13
Cannot take substr outside string
current instr.: 'parrot;ProfTest;PIRProfile;_block1052' pc 875 (runtime/parrot/library/ProfTest/PIRProfile.pir:364)
called from Sub 'parrot;ProfTest;PIRProfile;_block1048' pc 821 (runtime/parrot/library/ProfTest/PIRProfile.pir:27)
called from Sub 'parrot;ProfTest;PIRProfile;make_line_hash' pc 669 (runtime/parrot/library/ProfTest/PIRProfile.pir:278)
called from Sub 'parrot;ProfTest;PIRProfile;_block1027' pc 545 (runtime/parrot/library/ProfTest/PIRProfile.pir:232)
called from Sub 'parrot;ProfTest;PIRProfile;build_profile_array' pc 488 (runtime/parrot/library/ProfTest/PIRProfile.pir:212)
called from Sub 'parrot;ProfTest;PIRProfile;new' pc 226 (runtime/parrot/library/ProfTest/PIRProfile.pir:100)
called from Sub '_block1000' pc 180 ((file unknown):61916563) (t/profiling/profiling.t:17)
called from Sub 'parrot;HLL;Compiler;_block1177' pc 24737 (ext/nqp-rx/src/stage0/HLL-s0.pir:0)
called from Sub 'parrot;HLL;Compiler;eval' pc 24614 (ext/nqp-rx/src/stage0/HLL-s0.pir:0)
called from Sub 'parrot;PCT;HLLCompiler;evalfiles' pc 1501 (compilers/pct/src/PCT/HLLCompiler.pir:764)
called from Sub 'parrot;PCT;HLLCompiler;command_line' pc 1719 (compilers/pct/src/PCT/HLLCompiler.pir:875)
called from Sub 'parrot;NQP;Compiler;main' pc 92462 (ext/nqp-rx/src/stage0/NQP-s0.pir:10)
dubious
	Test returned status 1 (wstat 256, 0x100)
DIED. FAILED tests 1-13
	Failed 13/13 tests, 0.00% okay
Failed Test             Stat Wstat Total Fail  Failed  List of Failed
-------------------------------------------------------------------------------
t/profiling/profiling.t    1   256    13   26 200.00%  1-13
Failed 1/1 test scripts, 0.00% okay. 13/13 subtests failed, 0.00% okay.