Landing: 39a6b7de56eb

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Project / Subsystem

gcc / libgfortran

Date

2026-08-28

Author

Jerry DeLisle

Commit

39a6b7de56ebd7091c092a4b07fed3809f10544d

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: libgfortran
patch_id: —
commit_hash: 39a6b7de56ebd7091c092a4b07fed3809f10544d
source_type: github
headline: libgfortran: Terminate all images on ERROR STOP in caf_shmem
tldr: Ensures ERROR STOP in Fortran coarrays terminates all participating images, preventing deadlocks.
author: Jerry DeLisle
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • libgfortran
• coarray
• fortran
• error handling
• f2023
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/39a6b7de56ebd7091c092a4b07fed3809f10544d
date: 2026-08-28T00:00:00.000Z

This change modifies the Fortran coarray shared memory implementation to correctly handle ERROR STOP statements. Previously, an ERROR STOP on one image would cause other images to block indefinitely on subsequent synchronization operations. Now, ERROR STOP correctly initiates error termination across all images in the team, preventing deadlocks and ensuring consistent program termination behavior.