JuliaLang/julia

warn on constant redefinition (in package tests)?

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#58,670 opened on Jun 8, 2025

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help wantedminor change

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Description

The command-line option --warn-overwrite=yes, usually turned on while running the test suite of a package, warns on method overwrite. It seems inconsistent, then, that the new, more powerful, feature of constant redefinition does not get warned against in package tests.

Should --warn-overwrite=yes be expanded to warn on the redefinition of each constant?

tags: rebinding, binding partition

Contributor guide

Research direction
Examine the current implementation of warn overwrite in the Julia compiler and test infrastructure; identify where constant redefinition occurs (e.g., in package test environments) and assess how to extend the warning to that case.
Tech stack
julia
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
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.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
JuliaTesting
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60