racket/drracket

drracket doesn't like infinity recursive macro

Open

#622 opened on Jul 1, 2023

View on GitHub
 (0 comments) (0 reactions) (0 assignees)Racket (102 forks)github user discovery
good first issue

Repository metrics

Stars
 (513 stars)
PR merge metrics
 (Avg merge 14d) (1 merged PR in 30d)

Description

Drracket silently reach 100% CPU when open a file with infinity recursion macro:

#lang racket

(define-syntax (f stx)
  stx)

f

It goes back to normal if I fix the macro to make it terminate.

It also runs forever for check syntax. But I can stop it in this case.

Contributor guide

Research direction
Reproduce the infinite loop by opening the file in DrRacket. Use 'Check Syntax' to observe the hang. The macro transformer must always terminate; add a termination check or prevent infinite recursion.
Tech stack
None
Domain
devtools
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Racket
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70