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  • #15917

Closed
Open
Opened Nov 19, 2018 by Heimdell@trac-Heimdell

GHC seems to re-read source of module to produce fancy error msgs

I had a module with unused name txFees in it. I started compilation and in the same time edited code by renaming txFees -> _txFees.

I got the following message:

    warning: [-Wunused-matches]
        Defined but not used: ‘txFees’
       |
    40 |             } _txFees
       |               ^^^^^^
    
    <no location info>: error: 
    Failing due to -Werror.

The screenshot is in the attachment. Notice that message part is about old code (txFees), and preview is about new code (_txFees).

Trac metadata
Trac field Value
Version 8.2.2
Type Bug
TypeOfFailure OtherFailure
Priority lowest
Resolution Unresolved
Component Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC @int-index
Operating system
Architecture
Assignee
Assign to
8.6.3
Milestone
8.6.3
Assign milestone
Time tracking
None
Due date
None
Reference: ghc/ghc#15917