nqp/toqast build failure

gdb.log

(gdb) run --library=src/stage0 src/stage0/nqp.pbc --target=pir --output=src/stage1/gen/nqp-mo.pir --setting=NULL --no-regex-lib src/stage1/gen/nqp-mo.pm
Starting program: /home/moritz/p6/rakudo/install/bin/parrot --library=src/stage0 src/stage0/nqp.pbc --target=pir --output=src/stage1/gen/nqp-mo.pir --setting=NULL --no-regex-lib src/stage1/gen/nqp-mo.pm
[Thread debugging using libthread_db enabled]

Program received signal SIGSEGV, Segmentation fault.
0x00002aaaaad5c5e0 in Parrot_hash_buffer () from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
(gdb) bt
#0  0x00002aaaaad5c5e0 in Parrot_hash_buffer () from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#1  0x00002aaaaae2fd01 in fixed8_hash () from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#2  0x00002aaaaad5c006 in Parrot_hash_get_bucket ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#3  0x00002aaaaadd1752 in Parrot_Hash_exists_keyed_str ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#4  0x00002aaaaea25605 in add_string_to_heap () from dynext/nqp_ops.so
#5  0x00002aaaaea2745e in write_str_func () from dynext/nqp_ops.so
#6  0x00002aaaaea20f69 in serialize () from dynext/nqp_ops.so
#7  0x00002aaaaea28cf3 in Serialization_serialize () from dynext/nqp_ops.so
#8  0x00002aaaaea0d3ea in Parrot_nqp_serialize_sc_s_p_p () from dynext/nqp_ops.so
#9  0x00002aaaaad78d96 in runops_fast_core () from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#10 0x00002aaaaad78c0a in runops_int () from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#11 0x00002aaaaad615ae in runops () from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#12 0x00002aaaaad5ce8e in Parrot_pcc_invoke_from_sig_object ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#13 0x00002aaaaea1e967 in Parrot_multi_dispatch_over_lexical_candidates_p () from dynext/nqp_ops.so
#14 0x00002aaaaad78d96 in runops_fast_core () from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#15 0x00002aaaaad78c0a in runops_int () from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#16 0x00002aaaaad615ae in runops () from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#17 0x00002aaaaad5ce8e in Parrot_pcc_invoke_from_sig_object ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#18 0x00002aaaaad5132a in Parrot_ext_call () from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#19 0x00002aaaaae2dfe8 in Parrot_Task_invoke () from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#20 0x00002aaaaad5ce3f in Parrot_pcc_invoke_from_sig_object ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#21 0x00002aaaaad5132a in Parrot_ext_call () from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#22 0x00002aaaaad7cf7d in Parrot_cx_outer_runloop ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#23 0x00002aaaaad7d00d in Parrot_cx_begin_execution ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#24 0x00002aaaaad84288 in Parrot_pf_execute_bytecode_program ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#25 0x00002aaaaad4c92a in Parrot_api_run_bytecode ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.4.7.0
#26 0x0000000000401fa3 in main ()