[erlang-questions] Valid Erlang module?

[Rohinton Kazak (rkazak)]

Hi,

Just curious to know if this is a valid Erlang module.

—8<
> cat mirror.erl 
-module(mirror).

-export([mirror/1]).

mirror(Anything) -> Anything.

As when I try and compile it I get

1> c(mirror).
mirror.erl: internal error in lint_module;
crash reason: undef

  in function  sets:to_list/1
     called as sets:to_list([])
  in call from erl_lint:check_unused_records/2 (erl_lint.erl, line 1211)
  in call from erl_lint:post_traversal_check/2 (erl_lint.erl, line 901)
  in call from erl_lint:module/3 (erl_lint.erl, line 534)
  in call from compile:lint_module/2 (compile.erl, line 1111)
  in call from compile:'-internal_comp/5-anonymous-1-'/3 (compile.erl, line 342)
  in call from compile:fold_comp/4 (compile.erl, line 369)
  in call from compile:internal_comp/5 (compile.erl, line 353)
error

Thanks in advance!

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