KT-8751 Assertion in HeuriticSignatures

#KT-8751 Fixed

idea/idea-completion/testData/smartMultiFile/KT_8751/JavaClass.java

@@ -0,0 +1,3 @@
+class JavaClass {
+    <T> String foo(T p){}
+}

idea/idea-completion/testData/smartMultiFile/KT_8751/KT_8751.kt

@@ -0,0 +1,5 @@
+fun foo(javaClass: JavaClass, p: String) {
+    javaClass.foo(<caret>)
+}
+
+// EXIST: p

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

@@ -101,6 +101,12 @@ public class MultiFileSmartCompletionTestGenerated extends AbstractMultiFileSmar
         doTest(fileName);
     }
 
+    @TestMetadata("KT_8751")
+    public void testKT_8751() throws Exception {
+        String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/smartMultiFile/KT_8751/");
+        doTest(fileName);
+    }
+
     @TestMetadata("NoObjectDuplication")
     public void testNoObjectDuplication() throws Exception {
         String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/smartMultiFile/NoObjectDuplication/");