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Test arrowrun001 the ghci way gives a core lint error:

*** Core Lint Errors: in result of Desugar ***
<no location info>:
    In the expression: {tick (main:Main, 38)}_dOu
             @ (GHC.Base.Bool -> Main.Exp -> Main.Exp -> GHC.Prim.State# GHC.Prim.RealWorld)
             b_axo
    b_axo is out of scope
*** Offending Program ***
[...]

arrowrun002 and arrowrun003 also have core lint failures that, at least, look superficially similar.

arrowrun004 has a different looking core lint failure, and it happens for all ways:

*** Core Lint Errors: in result of Desugar ***
<no location info>:
    In the expression: >>>_aLC @ () @ () @ GHC.Base.Int
    >>>_aLC is out of scope
*** Offending Program *** 
[...]

Trac metadata

Trac field	Value
Version	6.7
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case	arrowrun001 arrowrun004
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system	Unknown
Architecture	Unknown