Reproduction

• Rspack: @rspack/core@2.1.4
• Repository: https://github.com/hardfist/rspack-repro-incremental-error-location
• Run: pnpm install && pnpm repro

The entry imports the same missing request twice:

import { first } from "./dep.js";
import { second } from "./dep.js";
console.log(first, second);

The script builds once, deletes dep.js, and compares an incremental rebuild with a cold build.

incremental rebuild after deleting dep.js: 3:13-18
cold build with dep.js missing:             1:1-34
BUG REPRODUCED: incremental location 3:13-18 differs from cold location 1:1-34.

Expected behavior

The same missing request should report a stable location regardless of whether the module graph was repaired incrementally or rebuilt cold.

Suspected area

The repair path groups affected dependencies in crates/rspack_core/src/compilation/build_module_graph/graph_updater/repair/process_dependencies.rs, while the diagnostic is assigned from create_data.dependencies[0].loc() in crates/rspack_core/src/compilation/build_module_graph/graph_updater/repair/factorize.rs. The incremental path can select a different dependency from the cold path when a group is reconstructed from affected dependency collections.