8015648: Duplicate variable in lambda causes javac crash

Missing flag in synthetic lambda blog is causing duplicates symbol to go undetected

Reviewed-by: jjg, vromero

langtools/src/share/classes/com/sun/tools/javac/comp/Attr.java

@@ -2609,7 +2609,7 @@ public class Attr extends JCTree.Visitor {
                 //field initializer
                 lambdaEnv = env.dup(that, env.info.dup(env.info.scope.dupUnshared()));
                 lambdaEnv.info.scope.owner =
-                    new MethodSymbol(0, names.empty, null,
+                    new MethodSymbol((owner.flags() & STATIC) | BLOCK, names.empty, null,
                                      env.info.scope.owner);
             } else {
                 lambdaEnv = env.dup(that, env.info.dup(env.info.scope.dup()));

langtools/test/tools/javac/lambda/LambdaScope05.java

@@ -0,0 +1,31 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8015648
+ * @summary Duplicate variable in lambda causes javac crash
+ * @compile/fail/ref=LambdaScope05.out -XDrawDiagnostics LambdaScope05.java
+ */
+
+class LambdaScope05 {
+    interface VoidFun1 {
+        void m(int i);
+    }
+
+    static Runnable r1 = () -> { VoidFun1 p = p -> { }; };
+    Runnable r2 = () -> { VoidFun1 p = p -> { }; };
+
+    static {
+        Runnable r = () -> { VoidFun1 p = p -> { }; };
+    }
+
+    {
+        Runnable r = () -> { VoidFun1 p = p -> { }; };
+    }
+
+    static void m_static() {
+        Runnable r = () -> { VoidFun1 p = p -> { }; };
+    }
+
+    void m() {
+        Runnable r = () -> { VoidFun1 p = p -> { }; };
+    }
+}

langtools/test/tools/javac/lambda/LambdaScope05.out

@@ -0,0 +1,7 @@
+LambdaScope05.java:13:47: compiler.err.already.defined.in.clinit: kindname.variable, p, kindname.static.init, kindname.class, LambdaScope05
+LambdaScope05.java:14:40: compiler.err.already.defined.in.clinit: kindname.variable, p, kindname.instance.init, kindname.class, LambdaScope05
+LambdaScope05.java:17:43: compiler.err.already.defined.in.clinit: kindname.variable, p, kindname.static.init, kindname.class, LambdaScope05
+LambdaScope05.java:21:43: compiler.err.already.defined.in.clinit: kindname.variable, p, kindname.instance.init, kindname.class, LambdaScope05
+LambdaScope05.java:25:43: compiler.err.already.defined: kindname.variable, p, kindname.method, m_static()
+LambdaScope05.java:29:43: compiler.err.already.defined: kindname.variable, p, kindname.method, m()
+6 errors