IDE/FIR IDE: fix not showed following type parameters in completion

idea/idea-completion/testData/basic/common/SecondTypeArg.kt

@@ -0,0 +1,5 @@
+// FIR_COMPARISON
+
+fun <T: <caret>, S>.foo() {}
+
+// EXIST: S

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/JSBasicCompletionTestGenerated.java

@@ -651,6 +651,11 @@ public class JSBasicCompletionTestGenerated extends AbstractJSBasicCompletionTes
             runTest("idea/idea-completion/testData/basic/common/RecieverMembersFromExtFun.kt");
         }
 
+        @TestMetadata("SecondTypeArg.kt")
+        public void testSecondTypeArg() throws Exception {
+            runTest("idea/idea-completion/testData/basic/common/SecondTypeArg.kt");
+        }
+
         @TestMetadata("SetPrefixForProperties.kt")
         public void testSetPrefixForProperties() throws Exception {
             runTest("idea/idea-completion/testData/basic/common/SetPrefixForProperties.kt");

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/JvmBasicCompletionTestGenerated.java

@@ -651,6 +651,11 @@ public class JvmBasicCompletionTestGenerated extends AbstractJvmBasicCompletionT
             runTest("idea/idea-completion/testData/basic/common/RecieverMembersFromExtFun.kt");
         }
 
+        @TestMetadata("SecondTypeArg.kt")
+        public void testSecondTypeArg() throws Exception {
+            runTest("idea/idea-completion/testData/basic/common/SecondTypeArg.kt");
+        }
+
         @TestMetadata("SetPrefixForProperties.kt")
         public void testSetPrefixForProperties() throws Exception {
             runTest("idea/idea-completion/testData/basic/common/SetPrefixForProperties.kt");

idea/idea-fir/tests/org/jetbrains/kotlin/idea/fir/completion/HighLevelJvmBasicCompletionTestGenerated.java

@@ -651,6 +651,11 @@ public class HighLevelJvmBasicCompletionTestGenerated extends AbstractHighLevelJ
             runTest("idea/idea-completion/testData/basic/common/RecieverMembersFromExtFun.kt");
         }
 
+        @TestMetadata("SecondTypeArg.kt")
+        public void testSecondTypeArg() throws Exception {
+            runTest("idea/idea-completion/testData/basic/common/SecondTypeArg.kt");
+        }
+
         @TestMetadata("SetPrefixForProperties.kt")
         public void testSetPrefixForProperties() throws Exception {
             runTest("idea/idea-completion/testData/basic/common/SetPrefixForProperties.kt");

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/completion/CompletionDummyIdentifierProviderService.kt

@@ -43,10 +43,19 @@ abstract class CompletionDummyIdentifierProviderService {
                 ?: specialExtensionReceiverDummyIdentifier(tokenBefore)
                 ?: specialInTypeArgsDummyIdentifier(tokenBefore)
                 ?: specialInArgumentListDummyIdentifier(tokenBefore)
+                ?: isInTypeParametersList(tokenBefore)
                 ?: DEFAULT_DUMMY_IDENTIFIER
         }
     }
 
+    private fun isInTypeParametersList(tokenBefore: PsiElement?): String? {
+        if (tokenBefore == null) return null
+        if (tokenBefore.parents.any { it is KtTypeParameterList }) {
+            return CompletionUtilCore.DUMMY_IDENTIFIER_TRIMMED
+        }
+        return null
+    }
+
     private fun specialLambdaSignatureDummyIdentifier(tokenBefore: PsiElement?): String? {
         var leaf = tokenBefore
         while (leaf is PsiWhiteSpace || leaf is PsiComment) {