HintMatcher: fix potential crash (#608)

Fixes #341
fsprojects · Dec 7, 2023 · 323223f · 323223f
1 parent 06bb0af
commit 323223f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/FSharpLint.Core/Rules/Hints/HintMatcher.fs b/src/FSharpLint.Core/Rules/Hints/HintMatcher.fs
@@ -256,7 +256,7 @@ module private MatchExpression =
             | _ -> NoMatch
         | Expression.Variable(var) ->
             match expr with
-            | AstNode.Expression(expr) -> arguments.MatchedVariables.Add(var, expr)
+            | AstNode.Expression(expr) -> arguments.MatchedVariables.TryAdd(var, expr) |> ignore
             | _ -> ()
             Match([])
         | Expression.Wildcard ->