[erlang-bugs] Internal error in v3_codegen when using [] as map key

[Anthony Ramine]

https://github.com/erlang/otp/pull/263

-- 
Anthony Ramine

Le 4 mars 2014 à 09:17, Ulf Norell <ulf.norell@REDACTED> a écrit :

> I started generating map expressions in the program generator. First of many:
> 
> -module(bug).
> f() -> #{[] => 0, a => 1}.
> 
> $ erl
> Erlang/OTP 17 [RELEASE CANDIDATE 2] [erts-6.0] [source-a74e66a] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false]
> 
> Eshell V6.0  (abort with ^G)
> 1> c(bug). 
> Function: f/0
> bug.erl: internal error in v3_codegen;
> crash reason: {case_clause,{'EXIT',{{case_clause,{{{atom,a},{integer,1}},{nil,{integer,0}}}},
>                       [{v3_codegen,'-map_pair_strip_and_termsort/1-anonymous-1-',
>                                    2,
>                                    [{file,"v3_codegen.erl"},{line,1554}]},
>                        {lists,sort,2,[{file,"lists.erl"},{line,967}]},
>                        {v3_codegen,set_cg,6,
>                                    [{file,"v3_codegen.erl"},{line,1522}]},
>                        {v3_codegen,'-cg_list/5-anonymous-0-',3,
>                                    [{file,"v3_codegen.erl"},{line,190}]},
>                        {v3_codegen,flatmapfoldl,3,
>                                    [{file,"v3_codegen.erl"},{line,2161}]},
>                        {v3_codegen,cg_list,5,
>                                    [{file,"v3_codegen.erl"},{line,189}]},
>                        {v3_codegen,cg_block,5,
>                                    [{file,"v3_codegen.erl"},{line,437}]},
>                        {v3_codegen,block_cg,4,
>                                    [{file,"v3_codegen.erl"},{line,422}]}]}}}
> 
>   in function  compile:'-select_passes/2-anonymous-2-'/2 (compile.erl, line 493)
>   in call from compile:'-internal_comp/4-anonymous-1-'/2 (compile.erl, line 290)
>   in call from compile:fold_comp/3 (compile.erl, line 308)
>   in call from compile:internal_comp/4 (compile.erl, line 292)
>   in call from compile:'-do_compile/2-anonymous-0-'/2 (compile.erl, line 153)
> bug.erl:2: Warning: function f/0 is unused
> error
> 
> / Ulf
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