Landing: fe37b9c1c4ec

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Project / Subsystem

gcc / cobol

Date

2026-07-09

Author

James K. Lowden

Commit

fe37b9c1c4ecb5dbb3762755ad1bd6eccf524afd

Source

github

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Breaking

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All attributes

project: gcc
subsystem: cobol
patch_id: —
commit_hash: fe37b9c1c4ecb5dbb3762755ad1bd6eccf524afd
source_type: github
headline: cobol: Replace NUL input with space, with diagnostic.
tldr: Fixes COBOL parsing by replacing embedded NUL characters with spaces and issuing a diagnostic message.
author: James K. Lowden
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • cobol
• lexer
• error handling
• character encoding
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/fe37b9c1c4ecb5dbb3762755ad1bd6eccf524afd
date: 2026-07-09T00:00:00.000Z

This commit addresses an issue in the COBOL compiler where NUL characters embedded within alphanumeric literals caused parsing errors, as the lexer treated NUL as an end-of-file marker. The code now detects NUL characters in the lexio file reader, replaces them with spaces, increments an error counter, and emits a diagnostic message. This ensures that COBOL source files with such characters can be processed correctly.