Defining a function in GHCi results in different strictness behavior than defining it in a file
When defining a strict composition function in GHCi using
let f .:. g = seq f (seq g (\x -> f (g x)))(omitting the let makes no difference) and then executing
seq (undefined .:. undefined) ()this evaluates to () instead of bottom as I would have expected.
If .:. is defined an a file and then loaded in GHCi the same statement evaluates to bottom. This also holds when .:. is introduced via a let+in instead of a separate let statement.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.0.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |