Skip to content

Add regression test: #7177, never-matched warning FS0026 with active patterns #19528

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
T-Gro merged 1 commit into from
Apr 1, 2026
Merged

Add regression test: #7177, never-matched warning FS0026 with active patterns #19528

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
17 changes: 17 additions & 0 deletions tests/FSharp.Compiler.ComponentTests/ErrorMessages/DiagnosticRegressionTests.fs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,23 @@ type Vehicle() = class end
(Error 267, Line 3, Col 7, Line 3, Col 29, "This is not a valid constant expression or custom attribute value") ]


// https://github.com/dotnet/fsharp/issues/7177
[<Fact>]
let ``Issue 7177 - never matched warning FS0026 is emitted when active pattern precedes wildcard rules`` () =
FSharp """
let (|AP|_|) (x: obj) = Some()

let _ =
match obj() with
| AP _ -> ()
| _ -> ()
| _ -> ()
"""
|> asLibrary
|> typecheck
|> shouldFail
|> withWarningCode 26

// https://github.com/dotnet/fsharp/issues/16410
[<Fact>]
let ``Issue 16410 - no spurious FS3570 warning with KeyValue active pattern`` () =
Expand Down
Loading