Make :sprint, :print, and :force work with cyclical structures
> t = "hi" : t
> :force t
never completes, because GHC races around and around in a loop forever. It would seem better to keep a hashset of nodes that have already been visited to avoid getting stuck, and print out a reasonable representation of the graph.
Trac metadata
Trac field | Value |
---|---|
Version | 8.2.1 |
Type | FeatureRequest |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | GHCi |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |