[erlang-questions] [bug] beam_asm failure on invalid binary match

Will <>
Fri Oct 3 19:20:00 CEST 2008


Hello,

I mistakenly set the size specifier in a binary match to zero and it caused
beam_asm to crash.
This is Erlang/OTP R12B-4.

Test case:

test3() ->
    <<Len:16/little, Str:Len/binary, 0:0>> = <<2, 0, $h, $i, 0>>.

Result:

crash reason: {function_clause,[{beam_dict,old_string,[[],[]]},
                                {beam_dict,string,2},
                                {beam_asm,encode_arg,2},
                                {beam_asm,encode_op_1,3},
                                {beam_asm,assemble_function,3},
                                {beam_asm,assemble_1,4},
                                {beam_asm,assemble,4},
                                {beam_asm,module,4}]}

Thanks,
Will
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