Fix for issue 9855 (#9859)

Author: anthony-c-martin

src/Bicep.Core.IntegrationTests/ScenarioTests.cs

@@ -4245,6 +4245,19 @@ param appsettings object
             result.Should().NotHaveAnyDiagnostics();
         }
 
+        // https://github.com/Azure/bicep/issues/9855
+        [TestMethod]
+        public void Test_Issue9855()
+        {
+            var result = CompilationHelper.Compile(@"
+/*************
+* BLOCK     *
+**************/
+");
+
+            result.Should().NotHaveAnyDiagnostics();
+        }
+
         // https://github.com/Azure/bicep/issues/9469
         [TestMethod]
         public void Test_Issue9469()

src/Bicep.Core/Parsing/Lexer.cs

@@ -544,7 +544,7 @@ private SyntaxTrivia ScanMultiLineComment()
                 var nextChar = textWindow.Peek();
                 textWindow.Advance();
 
-                if (nextChar != '*')
+                if (nextChar != '*' || textWindow.Peek() != '/')
                 {
                     continue;
                 }