8029633: Raw inner class constructor ref should not perform diamond inference

Backport-of: 6707bfbc153de193b891c1ad3d4d8d0a6ee62307

Author: Vicente Romero

src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Resolve.java

@@ -3685,7 +3685,9 @@ class ConstructorReferenceLookupHelper extends ReferenceLookupHelper {
                 List<Type> typeargtypes, MethodResolutionPhase maxPhase) {
             super(referenceTree, names.init, site, argtypes, typeargtypes, maxPhase);
             if (site.isRaw()) {
-                this.site = new ClassType(site.getEnclosingType(), site.tsym.type.getTypeArguments(), site.tsym, site.getMetadata());
+                this.site = new ClassType(site.getEnclosingType(),
+                        !(site.tsym.isInner() && site.getEnclosingType().isRaw()) ?
+                                site.tsym.type.getTypeArguments() : List.nil(), site.tsym, site.getMetadata());
                 needsInference = true;
             }
         }

test/langtools/tools/javac/lambda/methodReference/MethodRefNewInnerRawTest.java

@@ -0,0 +1,24 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8029633
+ * @summary Raw inner class constructor ref should not perform diamond inference
+ * @compile/fail/ref=MethodRefNewInnerRawTest.out -Werror -Xlint:unchecked -XDrawDiagnostics MethodRefNewInnerRawTest.java
+ */
+
+import java.util.function.*;
+
+class MethodRefNewInnerRawTest<T> {
+    class Inner1 {}
+    class Inner2<U> {}
+
+    Supplier<MethodRefNewInnerRawTest.Inner1> s1 = MethodRefNewInnerRawTest.Inner1::new;
+    Supplier<MethodRefNewInnerRawTest.Inner2> s2 = MethodRefNewInnerRawTest.Inner2::new;
+    Supplier<MethodRefNewInnerRawTest<T>.Inner1> s3 = MethodRefNewInnerRawTest.Inner1::new;
+    Supplier<MethodRefNewInnerRawTest<T>.Inner2<String>> s4 = MethodRefNewInnerRawTest.Inner2::new;
+
+    static class Outer {
+        class Inner3<U> {}
+
+        Supplier<Outer.Inner3<String>> s5 = Outer.Inner3::new;
+    }
+}

test/langtools/tools/javac/lambda/methodReference/MethodRefNewInnerRawTest.out

@@ -0,0 +1,5 @@
+MethodRefNewInnerRawTest.java:16:55: compiler.warn.prob.found.req: (compiler.misc.unchecked.assign), MethodRefNewInnerRawTest.Inner1, MethodRefNewInnerRawTest<T>.Inner1
+MethodRefNewInnerRawTest.java:17:63: compiler.warn.prob.found.req: (compiler.misc.unchecked.assign), MethodRefNewInnerRawTest.Inner2, MethodRefNewInnerRawTest<T>.Inner2<java.lang.String>
+- compiler.err.warnings.and.werror
+1 error
+2 warnings