Add test for changing type of field inside Optional
#1332
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The Haskell implementation of Dhall had a bug where it permitted
this update, leading to an invalid inferred type:
```dhall
⊢ (None { x : Natural }) with ?.x = True
None { x : Natural }
```
Gabriella439
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Apr 5, 2023
See: dhall-lang/dhall-lang#1332 The standard already required this, but the Haskell implementation was not correctly conforming to the standard. Fixing this not only simplifies the Haskell code but also makes the code more greatly resemble the corresponding standard judgement.
Gabriella439
added a commit
to dhall-lang/dhall-haskell
that referenced
this pull request
Apr 16, 2023
See: dhall-lang/dhall-lang#1332 The standard already required this, but the Haskell implementation was not correctly conforming to the standard. Fixing this not only simplifies the Haskell code but also makes the code more greatly resemble the corresponding standard judgement.
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The Haskell implementation of Dhall had a bug where it permitted this update, leading to an invalid inferred type: