overloaded name used in record pattern matching leads to panic! (the 'impossible' happened) in ghc

In Haskell,

1. The scope of definitions can be controled.
2. The same name can be used to define both a function and a field of record.
3. The user can use that name in record pattern matching when only the function is within scope. For example

FuncId{ name = nm }

resulting in the following bug

[38 of 39] Compiling TxsUtils         ( src\TxsUtils.hs, .stack-work\dist\1f7101f2\build\Txs
Utils.o )
ghc.EXE: panic! (the 'impossible' happened)
  (GHC version 8.0.2 for x86_64-unknown-mingw32):
        translateConPatVec: lookup

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

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
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Operating system	Windows
Architecture