fix(codegen): avoid invalid sourcemap tokens for positions beyond source bounds

[Copilot]

Fix invalid sourcemap tokens when oxc_codegen adds punctuation beyond source bounds

[graphite-app]

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[codspeed-hq]

CodSpeed Performance Report

Merging #15069 will not alter performance

_{Comparing copilot/fix-commits-issue (ff3ecaf) with main (3a1cdd0)}

Summary

✅ 37 untouched

[sapphi-red]

@copilot fix lint error

[Copilot]

@copilot fix lint error

Fixed in 2a121f0. Collapsed nested if statements, used inline format args, and replaced redundant closure with method reference.

[Copilot]

Pull Request Overview

This PR fixes an issue where oxc_codegen generates invalid sourcemap tokens for positions beyond the original source content. When the codegen adds semicolons or newlines that don't exist in the original source, it was creating sourcemap mappings with out-of-bounds positions.

• Added bounds validation in add_source_mapping_end() to skip creating sourcemap tokens when span.end is beyond the source text length
• Added comprehensive test case validating that all sourcemap tokens have valid source positions

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
crates/oxc_codegen/src/lib.rs	Added bounds check in add_source_mapping_end to prevent invalid sourcemap tokens for positions beyond source content
crates/oxc_codegen/tests/integration/sourcemap.rs	Added test no_invalid_tokens_beyond_source to verify sourcemap tokens are within source bounds

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[Boshen]

Merge activity

• Oct 30, 2:46 AM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Oct 30, 2:47 AM UTC: Boshen added this pull request to the Graphite merge queue.
• Oct 30, 2:56 AM UTC: Merged by the Graphite merge queue.