inference when incomplete

java/java-psi-impl/src/com/intellij/psi/impl/source/resolve/graphInference/constraints/ExpressionCompatibilityConstraint.java

@@ -52,6 +52,11 @@ public class ExpressionCompatibilityConstraint extends InputOutputConstraintForm
       }
     
       final PsiType exprType = myExpression.getType();
+
+      if (exprType instanceof PsiLambdaParameterType) {
+        return false;
+      }
+
       if (exprType != null && exprType != PsiType.NULL) {
         constraints.add(new TypeCompatibilityConstraint(myT, exprType));
       }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/incomplete/InsideParenthesis.java

@@ -0,0 +1,14 @@
+import java.util.Optional;
+import java.util.function.Function;
+
+class Calls {
+  <A> Optional<A> a(A a) {return null;}
+  <B> B b(Optional<B> a) {return null;}
+  <C> Optional<C> c(C a) {return null;}
+
+  void foo(Function<String, Optional> computable) {}
+
+  {
+    ((x) -> a(b(c<error descr="'c(java.lang.Object)' in 'Calls' cannot be applied to '(<lambda parameter>)'">(x)</error>)));
+  }
+}

java/java-tests/testSrc/com/intellij/codeInsight/daemon/lambda/FunctionalExpressionIncompleteHighlightingTest.java

@@ -38,6 +38,10 @@ public class FunctionalExpressionIncompleteHighlightingTest extends LightDaemonA
     doTest();
   }
 
+  public void testInsideParenthesis() throws Exception {
+    doTest();
+  }
+
   private void doTest() {
     doTest(false);
   }