ghc.exe: panic! (the 'impossible' happened)

Full output:

ghc.exe: panic! (the 'impossible' happened)
  (GHC version 8.0.2 for x86_64-unknown-mingw32):
        initTc: unsolved constraints
  WC {wc_insol = [W] n_a1qA :: t_a1qz[tau:1] (CHoleCan: n)}

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

This failed on a trivial (albeit incorrect) "Hello world" code, while trying to execute it with stack: **stack Main.hs**

The code file is attached.

Note that this error happens when it incorrectly specifies the non-existing value **n** (instead of **name**) in the last expression.

Trac metadata

Trac field	Value
Version	8.0.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture

changed weight to 5

added Tbug Trac import labels

Attached file Main.hs ($1284).

Offending code file

closed

Thanks for the report. This is a duplicate of #13106 (closed), which will be fixed in GHC 8.2.1.

Trac metadata

Trac field	Value
Resolution	Unresolved → ResolvedDuplicate
Related	- → #13106 (closed)

added compiler crash label

added Pnormal label