[erlang-bugs] Internal error in beam_dead when using maps in guards

[Ulf Norell]

Replacing the map #{} makes the error go away.

-module(bug).
f() when is_map(#{}); false -> ok.

$ 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 refers to undefined label 6
bug.erl: internal error in beam_dead;
crash reason: {case_clause,{'EXIT',{undefined_label,6}}}

  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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