Landing: c8c1f777617d

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Project / Subsystem

gcc / libstdc++

Date

2026-07-10

Author

Tomasz Kamiński

Commit

c8c1f777617df6f1816900b779f32c80e016d7bd

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: libstdc++
patch_id: —
commit_hash: c8c1f777617df6f1816900b779f32c80e016d7bd
source_type: github
headline: libstdc++: Validate bound consistently in repeat_view constructors.
tldr: Ensures non-negative bound checks in `std::ranges::repeat_view` constructors.
author: Tomasz Kamiński
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • libstdc++
• ranges
• error handling
• cpp20
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/c8c1f777617df6f1816900b779f32c80e016d7bd
date: 2026-07-10T00:00:00.000Z

The constructors for std::ranges::repeat_view now consistently validate that the bound (specifying the number of repetitions) is non-negative. This change addresses LWG3772 by adding assertions for both the value-based and piecewise_construct_t constructors, ensuring that unsigned bound types are handled correctly and preventing runtime errors or unexpected behavior with negative bounds.