maps created by Data.Map.fromAscList fail lookup on some keys present
import Data.Map
member "foo" $ fromAscList [("foo", True), ("bar", False)]The above expression evaluates to False, when it should clearly be True. This works fine when fromList is used instead.
Tested on 6.8.2, but I don't see anything in the release notes vaguely related for 6.8.3.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.8.2 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | libraries/base |
| Test case | |
| Differential revisions | |
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| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |