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REPL cursor in big input 'stops' at top visible line #59938
Description
Version
v25.0.0-pre
Subsystem
repl
What steps will reproduce the bug?
When working with multiline inputs that have more lines than the terminal heights (in lines), moving all to the top of the big input causes the current lower part of the input to be rendered at all times. The cursor effectively moves up, the lower lines just stay the same instead of changing.
This happens when pressing up at the top visible line.
How often does it reproduce? Is there a required condition?
Always
What is the expected behavior? Why is that the expected behavior?
The lines are changed.
What do you see instead?
Wrong cursor movement.
Activity
ShivrajShelar99 commentedon Sep 20, 2025
tarunbatra commentedon Sep 30, 2025
Hey @BridgeAR , I was going to take a stab at this one. However, I am not sure what the exact issue is. I wasn't able to replicate it locally with multi-line inputs. Can you elaborate on the difference between actual and expected behavior?
repl-repro.mov
BridgeAR commentedon Oct 1, 2025
@tarunbatra I indeed did not describe the issue properly earlier. Thank you for pointing that out!
It must be an input that has more lines than the whole terminal is able to show at that time.
Han5991 commentedon Oct 9, 2025
@BridgeAR Does this screen recording show the bug correctly?
2025-10-09.9.13.24.mov
tarunbatra commentedon Oct 12, 2025
I have added a PR as well on this. #60222 @BridgeAR
I am still working on coming up with a test for this case. Meanwhile I would appreciate any reviews I can get.
repl: handle screen refresh for multiline input
repl: make history navigation work with big inputs