ERL-1163: Internal consistency check failed: keys_not_unique

[OTP-Maintainer]

Original reporter: wojtekmach
Affected version: Not Specified
Fixed in version: OTP-22.2.7
Component: Not Specified
Migrated from: https://bugs.erlang.org/browse/ERL-1163

---

This code:

{code:erlang}
-module(foo).
-compile(export_all).

dup(Map) ->
  case Map of
      #{'__struct__' := _} ->
          case Map of
              #{'__struct__' := _} ->
                  ok;
              O1 ->
                  O1
          end;
      O2 ->
          O2
  end.
{code}

causes this internal consistency check failure:

{code:erlang}
foo: function dup/1+5:
  Internal consistency check failed - please report this bug.
  Instruction: {test,has_map_fields,
                     {f,3},
                     {x,0},
                     {list,[{atom,'__struct__'},{atom,'__struct__'}]}}
  Error:       keys_not_unique:

foo.erl:2: Warning: export_all flag enabled - all functions will be exported
{code}

I'm on:

{code}
~% erl
Erlang/OTP 22 [erts-10.5.6] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe]

Eshell V10.5.6  (abort with ^G)
{code}

Original issue: [https://github.com/elixir-lang/elixir/issues/9801]

[OTP-Maintainer]

john said:

Thanks for your report, we'll have a patch out shortly. :)

[OTP-Maintainer]

john said:

Fixed in {{OTP 22.2.7}}, thanks again for your report!