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mprintf: acknowledge %F - #22719

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@bagder bagder commented Aug 28, 2026

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The code previously just ignored it, causing variadic argument desynchronization

Extend test 557 to verify

Reported-by: Stanislav Fort

The code previously just ignored it, causing variadic argument
desynchronization

Extend test 557 to verify

Reported-by: Stanislav Fort

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Pull request overview

Adds %F support to mprintf, preventing variadic argument desynchronization.

Changes:

  • Parses %F as an uppercase floating-point conversion.
  • Adds regression coverage in test 557.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File Description
lib/mprintf.c Handles and emits %F.
tests/libtest/lib557.c Verifies %F formatting.

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@bagder
bagder marked this pull request as ready for review August 28, 2026 11:48
@bagder bagder closed this in 48322e9 Aug 28, 2026
@bagder
bagder deleted the bagder/mprintf-F branch August 28, 2026 12:10
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