Use of plugins causes different SafeHaskellMode returned for the module
Use of plugins will mark safe inference as failed, even when the plugin does not modify anything. This can result in compile error when -XSafe is used. For example:
$ cat DefaultPlugin.hs
module DefaultPlugin (plugin) where
import GhcPlugins
plugin = defaultPlugin
$ cat B.hs
{-# OPTIONS_GHC -fplugin DefaultPlugin #-}
module B (answer) where
answer = 42
$ cat A.hs
{-# LANGUAGE Safe #-}
module A (main) where
import B
main = print answer
$ ...
A.hs:4:1: error:
B: Can't be safely imported! The module itself isn't safe.
Trac metadata
Trac field | Value |
---|---|
Version | 8.7 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |