backtrace from http://pastebin.com/C8EJw0KD + IO::Select

bt

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7b0fe08 in Parrot_ResizableIntegerArray_get_integer_keyed_int ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.9.0
(gdb) bt
#0  0x00007ffff7b0fe08 in Parrot_ResizableIntegerArray_get_integer_keyed_int ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.9.0
#1  0x00007ffff7ac723e in Parrot_FixedIntegerArray_get_pmc_keyed_int ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.9.0
#2  0x00007ffff05de1ab in Parrot_Select_nci_can_read ()
   from /home/moritz/p6/rakudo/install/lib/parrot/3.9.0-devel/dynext/select.so
#3  0x00007ffff7af31cd in Parrot_NativePCCMethod_invoke ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.9.0
#4  0x00007ffff7a75386 in runops_fast_core ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.9.0
#5  0x00007ffff7a751fa in runops_int ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.9.0
#6  0x00007ffff7a5d42e in runops ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.9.0
#7  0x00007ffff7a58d76 in Parrot_pcc_invoke_from_sig_object ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.9.0
#8  0x00007ffff7a58eb1 in Parrot_pcc_invoke_sub_from_c_args ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.9.0
#9  0x00007ffff7a80071 in Parrot_pf_execute_bytecode_program ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.9.0
#10 0x00007ffff7a48bda in Parrot_api_run_bytecode ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.9.0
#11 0x0000000000401540 in main ()
(gdb)