Compiler crash report

[Bjorn Gustavsson]

Thanks! We'll try to fix in R10B-3.

/Bjorn

Peter-Henry Mander <erlang@REDACTED> writes:

> Hi Gurus,
> 
> I managed to isolate a non-critical compilation crash report.
> When compiling the following code: 
> 
> ---- BEGIN ----
> 
> -module(compiler_error).
> 
> -export([test/0]).
> 
> test() ->
>    URI_Before =
>    {absoluteURI,
>       {scheme,fun() -> nil end},
>       {'hier-part',
>          {'net-path',
>             {srvr,
>                {userinfo,nil},
>                fun() -> nil end},
>             nil},
>          {'query',nil}}},
> 
>    {absoluteURI,
>       {scheme,_},
>       {'hier-part',
>          {'net-path',
>             {srvr,
>                {userinfo,nil},
>                HostportBefore},
>             nil},
>          {'query',nil}}} = URI_Before,
> 
>    %% ... some funky code ommitted, not relevant ...
> 
>    {absoluteURI,
>       {scheme,_},
>       {'hier-part',
>          {'net-path',
>             {srvr,
>                {userinfo,nil},
>                HostportAfter},
>             nil},
>          {'query',nil}}} = URI_Before,
>    %% NOTE: I intended to write URI_After instead of URI_Before
>    %% but the accident revealed that when you add the line below,
>    %% it causes internal error in v3_codegen on compilation
>    {hostport,{hostname,"HostName"},{port,nil}} = HostportAfter,
> 
>    ok.
> 
> 
> ---- END ----
> 
> I get this output:
> 
> 12> c(compiler_error).
> ./compiler_error.erl:none: internal error in v3_codegen;
> crash reason: {{case_clause,{'EXIT',{function_clause,
>                                         [{v3_codegen,
>                                              fetch_reg,
>                                              ['HostportAfter',[]]},
>                                          {v3_codegen,move_unsaved,4},
>                                          {v3_codegen,cg_call_args,4},
>                                          {v3_codegen,cg_setup_call,4},
>                                          {v3_codegen,bif_cg,7},
>                                          {v3_codegen,
>                                              '-cg_list/5-anonymous-0-',
>                                              3},
>                                          {v3_codegen,flatmapfoldl,3},
>                                          {v3_codegen,flatmapfoldl,3},
>                                          {v3_codegen,cg_list,5},
>                                          {v3_codegen,cg_block,5}]}}},
>                [{compile,'-select_passes/2-anonymous-2-',2},
>                 {compile,'-internal_comp/4-anonymous-1-',2},
>                 {compile,fold_comp,3},
>                 {compile,internal_comp,4},
>                 {compile,internal,3}]}
> ./compiler_error.erl:23: Warning: variable 'HostportBefore' is unused
> error
> 
> 
> Pete.
> 
> -- 
> "The Tao of Programming
>  flows far away 
>  and returns 
>  on the wind of morning."
> 

-- 
Björn Gustavsson, Erlang/OTP, Ericsson AB