src/hash.c:144: failed assertion 's'

[Matthew Wilson]

latest rakudo, including --gen-parrot

p6eval at debian:~/p2/bin$ ./perl6 -e '{}.=()'
src/hash.c:144: failed assertion 's'
Backtrace - Obtained 17 stack frames (max trace depth is 32).
/home/p6eval//p2/lib/libparrot.so.2.1.0 [0x2ba75d268173]
/home/p6eval//p2/lib/libparrot.so.2.1.0(Parrot_confess+0x87) [0x2ba75d2682a7]
/home/p6eval//p2/lib/libparrot.so.2.1.0 [0x2ba75d27fa42]
/home/p6eval//p2/lib/libparrot.so.2.1.0(parrot_hash_get_bucket+0xfc)
[0x2ba75d27c94c]
/home/p6eval//p2/lib/libparrot.so.2.1.0 [0x2ba75d3f9ac8]
/home/p6eval//p2/lib/parrot/2.1.0-devel/dynext/perl6_group.so [0x2ba760024612]
/home/p6eval//p2/lib/parrot/2.1.0-devel/dynext/perl6_group.so [0x2ba760024e64]
/home/p6eval//p2/lib/libparrot.so.2.1.0 [0x2ba75d1e1bc4]
/home/p6eval//p2/lib/libparrot.so.2.1.0 [0x2ba75d2c7724]
/home/p6eval//p2/lib/libparrot.so.2.1.0 [0x2ba75d2c62dc]
/home/p6eval//p2/lib/libparrot.so.2.1.0 [0x2ba75d28b484]
/home/p6eval//p2/lib/libparrot.so.2.1.0(Parrot_pcc_invoke_from_sig_object+0x1da)
[0x2ba75d280d4a]
/home/p6eval//p2/lib/libparrot.so.2.1.0(Parrot_pcc_invoke_sub_from_c_args+0x182)
[0x2ba75d280f02]
/home/p6eval//p2/lib/libparrot.so.2.1.0(Parrot_runcode+0x146) [0x2ba75d265096]
./perl6 [0x400d4a]
/lib/libc.so.6(__libc_start_main+0xe6) [0x2ba75f4aa1a6]
./perl6 [0x400b49]
Aborted