tcrun020 failure

tcrun020 is currently failing all ways:

=====> tcrun020(normal) 1947 of 2622 [0, 12, 0]
cd ./typecheck/should_run && '/64playpen/simonmar/nightly/HEAD-cam-04-unx/x86_64-unknown-linux/inplace/bin/ghc-stage2' -fforce-recomp -dcore-lint -dcmm-lint -dno-debug-output -no-user-package-conf -rtsopts  -o tcrun020 tcrun020.hs    >tcrun020.comp.stderr 2>&1
Compile failed (status 256) errors were:
[1 of 1] Compiling Main             ( tcrun020.hs, tcrun020.o )

tcrun020.hs:15:21:
    Illegal instance declaration for `C1 m Bool'
      (All instance types must be of the form (T a1 ... an)
       where a1 ... an are type *variables*,
       and each type variable appears at most once in the instance head.
       Use -XFlexibleInstances if you want to disable this.)
    In the instance declaration for `C1 m Bool'

*** unexpected failure for tcrun020(normal)

Trac metadata

Trac field	Value
Version	6.12.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	highest
Resolution	Unresolved
Component	Compiler (Type checker)
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