Visible type application: ASSERT failed! file compiler/typecheck/TcMatches.hs

Validate on Travis (in the configuration that defines GhcStage2HcOpts += -DDEBUG) reports , since 2db18b81:

Compile failed (status 256) errors were:
ghc-stage2: panic! (the 'impossible' happened)
  (GHC version 7.11.20151224 for x86_64-unknown-linux):
	ASSERT failed! file compiler/typecheck/TcMatches.hs, line 223

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


*** unexpected failure for T7681(normal)

Trac metadata

Trac field	Value
Version	7.11
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC	goldfire
Operating system
Architecture

changed milestone to %8.0.1

changed weight to 5

added Tbug Trac import labels

mentioned in commit bc8cac12

mentioned in commit da69358b

closed

Thanks for finding this, @thomie, and for making such a perspicuous bug title for me to find.

Trac metadata

Trac field	Value
Resolution	Unresolved → ResolvedFixed

added Pnormal label