[bmv2] Could not find type for <Mux>

[vikramnathan]

Note: I think this is a different bug than #216 since no bit slices are used here.

The following program:
test_bug2.p4.txt

gives me this error:

terminate called after throwing an instance of 'Util::CompilerBug'
  what():  COMPILER BUG: ../frontends/p4/typeMap.cpp:82
Could not find type for <Mux>(90708)

Aborted (core dumped)

What does this error mean? Is it a compiler bug or program issue?

Some notes:

1. Removing the conditional on line 98 (but keeping the body) seems to compile.
2. If line 97 is replaced with bool ok = same;, the code gives an Unexpected JSON error, likely the same as [bmv2] Unexpected JSON when using nested actions #231 .
3. If the Key instances are replaced with primitive types (e.g., bit<8>), the code compiles.

[mihaibudiu]

If you see COMPILER BUG it means this is a bug. You should not expect a very good error message from a compiler bug - something we didn't expect has happened.

[vikramnathan]

seems to be fixed.