Strictness of span and break does not match documentation
The documentation of span says
span p xsis equivalent to(takeWhile p xs, dropWhile p xs)
However, that's not literally true since span p xs is | if either xs is | or xs = x :_ and p x is |.
This same error is also present in the Haskell 98 report, which states the same property of span but gives a definition equivalent to the one used by GHC.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.0.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | libraries/base |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |