IDEA-223316 Name suggestions are not available when variable type is unresolved

GitOrigin-RevId: 20601bf806f770a4cf07c3a0a8c1d856f9c017fb

java/java-impl/src/com/intellij/codeInsight/completion/JavaMemberNameCompletionContributor.java

@@ -106,7 +106,11 @@ public class JavaMemberNameCompletionContributor extends CompletionContributor {
     }
 
     PsiType type = var.getType();
-    if (type instanceof PsiClassType && ((PsiClassType)type).resolve() == null) return;
+    if (type instanceof PsiClassType &&
+        ((PsiClassType)type).resolve() == null &&
+        seemsMistypedKeyword(((PsiClassType)type).getClassName())) {
+      return;
+    }
     
     SuggestedNameInfo suggestedNameInfo = codeStyleManager.suggestVariableName(variableKind, propertyName, null, type, StringUtil.isEmpty(matcher.getPrefix()));
     suggestedNameInfo = codeStyleManager.suggestUniqueVariableName(suggestedNameInfo, var, false);
@@ -138,6 +142,10 @@ public class JavaMemberNameCompletionContributor extends CompletionContributor {
     }
   }
 
+  private static boolean seemsMistypedKeyword(String className) {
+    return className != null && !StringUtil.isCapitalized(className);
+  }
+
   private static boolean hasStartMatches(PrefixMatcher matcher, Set<String> set) {
     for (String s : set) {
       if (matcher.isStartMatch(s)) {

java/java-tests/testSrc/com/intellij/java/codeInsight/completion/VariablesCompletionTest.groovy

@@ -307,4 +307,16 @@ class C {
     assert myFixture.completeBasic()?.size() == 0
   }
 
+  void "test suggest variable name when the type is unresolved but does not seem a mistyped keyword"() {
+    myFixture.configureByText 'a.java', '''
+class C {
+    { 
+      UndefinedType <caret>
+    }
+    }
+'''
+    myFixture.completeBasic()
+    myFixture.assertPreferredCompletionItems 0, 'undefinedType', 'type'
+  }
+
 }