Stepper loops on Omega
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- Dominant language
- Racket
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Description
I wanted to step the following ISL+ program:
#lang htdp/isl+
((λ (x) (x x)) (λ (x) (x x)))
I wanted to try and step through the reduction, and demonstrate it not make progress. But the stepper itself seemed to loop, with a blinking cursor after the End button, and no source displayed. Expected behavior?
Tested on DrRacket, version 9.0, english on an M1 Max running Sonoma.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the issue in DrRacket's stepper using the provided ISL+ Omega program and observe the behavior around the End button. Start by tracing the stepper entry point for this expression; done means the stepper no longer loops or clearly reports that the reduction makes no progress.
Written by the indexing model from the issue text.
Assessment
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100