JuliaGPU/CUDA.jl

Interactive reflection of caught errors is broken

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#2,798 opened on Jun 25, 2025

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 (1 comment) (0 reactions) (0 assignees)Julia (1,408 stars) (274 forks)batch import
good first issue

Description

As reported on Slack by @expandingman, the suggested interactive reflection using err objects is apparently broken:

Hint: catch this exception as `err` and call `code_typed(err; interactive = true)` to introspect the erroneous code with Cthulhu.jl

Contributor guide

Tech stack
None
Domain
developer experience
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
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.
needs investigation
Prerequisites
Julia programmingCUDA.jl basicsCthulhu.jl familiarity
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
The issue reports that the suggested interactive reflection using `err` objects with `code typed(err; interactive = true)` is broken. The report originated from Slack but details are not given here. Investigate the error handling code in CUDA.jl to understand how exceptions are caught and how the hint is generated. Check if there is a missing method or type instability. Look at the Cthulhu.jl integration. Consider reproducing the issue first by triggering an error that provides the hint, then attempting the interactive reflection.