The `Read` instance of `Rational` does not support decimal notation
main = print (1.10 :: Rational)is legal whereas
main = print (read "1.10" :: Rational)fails at runtime with "Prelude.read: no parse"
The same applies to "1E10", but the e-notation should be rejected in both cases (see #7044)
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.4.2 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | #7044 |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |
Edited by Christian Maeder