Task switch not allowed from inside staged nor pure functions

Description

Contributor guide

Tech stack

None

Domain

backend

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.

1-3 hours

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

JuliaCUDA.jl internalsstaged functions

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

25

Research direction

The issue is about a task switch caused by an @error call inside a generated function. Refer to the linked comment in issue #110 and the specific line in src/device/cuda/output.jl (L149). The fix likely involves replacing @error with a mechanism that does not cause a task switch, such as using @warn or a custom error handler. No linked PRs or assignees exist, so the issue is available but requires familiarity with Julia's staged functions and CUDA.jl internals.