[erlang-bugs] Internal error in v3_kernel when using funny map keys

[Ulf Norell]

-module(bug).
f() -> #{[try a after b end] => 0}.

-module(bug).
f() -> ok.
g() -> #{fun f/0 => 0}.

-module(bug).
f() -> ok.
g() -> #{{f()} => 0}.

$ 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 kernel_module;
crash reason: function_clause

  in function  v3_kernel:map_key_clean/1
     called as
v3_kernel:map_key_clean({k_cons,[2,{file,"bug.erl"}],{k_var,[],cor4},{k_nil,[2,{file,"bug.erl"}]}})
  in call from v3_kernel:map_group_pairs/2 (v3_kernel.erl, line 553)
  in call from v3_kernel:map_group_pairs/1 (v3_kernel.erl, line 529)
  in call from v3_kernel:map_split_pairs/5 (v3_kernel.erl, line 511)
  in call from v3_kernel:expr/3 (v3_kernel.erl, line 327)
  in call from v3_kernel:expr/3 (v3_kernel.erl, line 307)
  in call from v3_kernel:function/2 (v3_kernel.erl, line 152)
  in call from lists:mapfoldl/3 (lists.erl, line 1352)
bug.erl:2: Warning: function f/0 is unused
error

/ Ulf
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