Runtime error with RecordWildCards and a non-record constructor
The following program is accepted with no warning, and crashes at runtime with an error:
{-# LANGUAGE RecordWildCards #-}
newtype N = N Int deriving (Show)
main = print N{..}% runghc wildcards.hs
wildcards.hs: wildcards.hs:4:14-18: Missing field in record constructionI find this behavior surprising. Would it be better to either disallow it or have -fwarn-missing-fields warn it?
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.8.3 |
| Type | FeatureRequest |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
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