Fixed IL2121 single warn issue (#2953)

3 files changed, 36 insertions, 1 deletions

diff --git a/src/ILLink.Shared/DiagnosticId.cs b/src/ILLink.Shared/DiagnosticId.cs
index bcc967af1..2f5787070 100644
--- a/src/ILLink.Shared/DiagnosticId.cs
+++ b/src/ILLink.Shared/DiagnosticId.cs
@@ -222,7 +222,7 @@ namespace ILLink.Shared
 				2103 => MessageSubCategory.TrimAnalysis,
 				2106 => MessageSubCategory.TrimAnalysis,
 				2107 => MessageSubCategory.TrimAnalysis,
-				>= 2109 and <= 2120 => MessageSubCategory.TrimAnalysis,
+				>= 2109 and <= 2121 => MessageSubCategory.TrimAnalysis,
 				>= 3050 and <= 3052 => MessageSubCategory.AotAnalysis,
 				>= 3054 and <= 3055 => MessageSubCategory.AotAnalysis,
 				_ => MessageSubCategory.None,
diff --git a/test/ILLink.RoslynAnalyzer.Tests/generated/ILLink.RoslynAnalyzer.Tests.Generator/ILLink.RoslynAnalyzer.Tests.TestCaseGenerator/Warnings.WarningSuppressionTests.g.cs b/test/ILLink.RoslynAnalyzer.Tests/generated/ILLink.RoslynAnalyzer.Tests.Generator/ILLink.RoslynAnalyzer.Tests.TestCaseGenerator/Warnings.WarningSuppressionTests.g.cs
index 62b51050b..116fd8239 100644
--- a/test/ILLink.RoslynAnalyzer.Tests/generated/ILLink.RoslynAnalyzer.Tests.Generator/ILLink.RoslynAnalyzer.Tests.TestCaseGenerator/Warnings.WarningSuppressionTests.g.cs
+++ b/test/ILLink.RoslynAnalyzer.Tests/generated/ILLink.RoslynAnalyzer.Tests.Generator/ILLink.RoslynAnalyzer.Tests.TestCaseGenerator/Warnings.WarningSuppressionTests.g.cs
@@ -56,6 +56,12 @@ namespace ILLink.RoslynAnalyzer.Tests.Warnings
 		}
 
 		[Fact]
+		public Task DetectRedundantSuppressionsSingleWarn ()
+		{
+			return RunTest (allowMissingWarnings: true);
+		}
+
+		[Fact]
 		public Task SuppressWarningsInAssembly ()
 		{
 			return RunTest (allowMissingWarnings: true);
diff --git a/test/Mono.Linker.Tests.Cases/Warnings/WarningSuppression/DetectRedundantSuppressionsSingleWarn.cs b/test/Mono.Linker.Tests.Cases/Warnings/WarningSuppression/DetectRedundantSuppressionsSingleWarn.cs
new file mode 100644
index 000000000..4ba1a6149
--- /dev/null
+++ b/test/Mono.Linker.Tests.Cases/Warnings/WarningSuppression/DetectRedundantSuppressionsSingleWarn.cs
@@ -0,0 +1,29 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Diagnostics.CodeAnalysis;
+using Mono.Linker.Tests.Cases.Expectations.Assertions;
+using Mono.Linker.Tests.Cases.Expectations.Metadata;
+
+
+namespace Mono.Linker.Tests.Cases.Warnings.WarningSuppression
+{
+	[SkipKeptItemsValidation]
+	[SetupLinkerArgument ("--singlewarn")]
+	[LogContains ("warning IL2104: Assembly 'test' produced trim warnings")]
+	[LogDoesNotContain ("IL2121")]
+	class DetectRedundantSuppressionsSingleWarn
+	{
+		public static void Main ()
+		{
+			TrimmerCompatibleMethod ();
+		}
+
+		[UnconditionalSuppressMessage ("test", "IL2072")]
+		public static string TrimmerCompatibleMethod ()
+		{
+			return "test";
+		}
+	}
+}