MultiWayIf parse behavior changed in 8.0.2
I just noticed while working on Jenkins that ed7a830d fails to build with GHC 8.0.1 with a parse error, yet succeeds with 8.2.1.
The issue is demonstrated by the following program,
{-# LANGUAGE MultiWayIf #-}
main =
if | True
-> putStrLn "hasdf"Under GHC 8.0.1 this fails to compile with a parse error. Under 8.0.2 and 8.2.1 it parses without any trouble.
We should sort out what the desired parse behavior for MultiWayIf is and add a test to ensure it doesn't change again.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.2.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | high |
| Resolution | Unresolved |
| Component | Compiler (Parser) |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | RyanGlScott |
| Operating system | |
| Architecture |