Landing: 62bc11d461f6

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Project / Subsystem

gcc / libstdc++

Date

2026-06-05

Author

Jonathan Wakely

Commit

62bc11d461f6e5a150c6c0593a0cec5851b76b19

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: libstdc++
patch_id: —
commit_hash: 62bc11d461f6e5a150c6c0593a0cec5851b76b19
source_type: github
headline: libstdc++: Fix Cylindrical Bessel functions for infinity.
tldr: Correctly returns zero for cylindrical Bessel functions at infinity.
author: Jonathan Wakely
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • math
• libstdc++
• bugfix
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/62bc11d461f6e5a150c6c0593a0cec5851b76b19
date: 2026-06-05T00:00:00.000Z

The asymptotic approximation for cylindrical Bessel functions (__cyl_bessel_jn_asymp) in libstdc++ now correctly returns zero when the input x is infinite. This aligns the behavior with the expected mathematical limit and includes new test cases to verify this fix.