scanr does not participate in stream fusion
This should be a no-brainer—it's trivial two write scanr as a foldr, making it a good consumer. Wrapping it up in build makes it a good producer too, but may require back-and-forth RULES.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.8.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | libraries/base |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | ekmett, hvr |
| Operating system | |
| Architecture |