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Regression of FS0049 (uppercase variable identifiers) #18992

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Area-Compiler-CheckingArea-Compiler-PatternMatchingBugRegression

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on Oct 12, 2025

With current main this gives warning FS0049:

match 42 with | UpperCase -> ()

This does not:

match 42 with UpperCase -> ()

The regression happened somewhere between April this year and now when the only test that tested for this got disabled by accident (My bad #18991)

majocha
added
Bug

Needs-Triage
on Oct 12, 2025
majocha
added the
Bug
issue type on Oct 12, 2025
github-project-automation
added this to F# Compiler and Toolingon Oct 12, 2025
github-project-automation
moved this to New in F# Compiler and Toolingon Oct 12, 2025
github-actions
added this to the Backlog milestone on Oct 12, 2025
edgarfgp
self-assigned this
on Oct 13, 2025
T-Gro
added
Area-Compiler-CheckingType checking, attributes and all aspects of logic checking

Area-Compiler-PatternMatchingpattern compilation, active patterns, performance, codegen

Regression
and removed
Needs-Triage
on Oct 15, 2025
T-Gro
closed this as completedin #19003 on Oct 22, 2025

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Area-Compiler-CheckingArea-Compiler-PatternMatchingBugRegression

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