incorporation: deal with PsiType.NULL (IDEA-147529)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/graphInference/IncorporationWithRawSubstitutors.java

@@ -0,0 +1,26 @@
+import java.io.Serializable;
+import java.util.function.BiFunction;
+
+class Test {
+
+  interface HasCode<T extends Serializable> {
+
+    static <U extends Serializable, T extends Enum<T> & HasCode<U>> T fromCode(U code, Class<T> classEnum) {
+      return null;
+    }
+  }
+
+  enum EnumRaw implements HasCode{
+    RAW_VALUE1;
+  }
+
+  public static <T, U extends Serializable, R> R checkExpected(BiFunction<T, U, R> funct, T param, U secondParam, R expectedResult){
+    R result = funct.apply(param, secondParam);
+    return result;
+  }
+
+  public static void main(String[] args){
+    checkExpected(HasCode::fromCode, "RAW_VALUE2", EnumRaw.class, EnumRaw.RAW_VALUE1);
+  }
+
+}