Report unmet trait requirements in IDE

#KT-3006 Fixed

compiler/frontend/src/org/jetbrains/jet/lang/resolve/LazyTopDownAnalyzer.java

@@ -24,6 +24,7 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.descriptors.*;
 import org.jetbrains.jet.lang.psi.*;
+import org.jetbrains.jet.lang.resolve.calls.CallsPackage;
 import org.jetbrains.jet.lang.resolve.lazy.KotlinCodeAnalyzer;
 import org.jetbrains.jet.lang.resolve.lazy.LazyImportScope;
 import org.jetbrains.jet.lang.resolve.lazy.descriptors.LazyClassDescriptor;
@@ -246,6 +247,8 @@ public class LazyTopDownAnalyzer {
         declarationResolver.checkRedeclarationsInPackages(resolveSession, topLevelFqNames);
         declarationResolver.checkRedeclarationsInInnerClassNames(c);
 
+        CallsPackage.checkTraitRequirements(c.getDeclaredClasses(), trace);
+
         overrideResolver.check(c);
 
         resolveImportsInAllFiles(c, resolveSession);

idea/testData/checker/unmetTraitRequirements.kt

@@ -0,0 +1,15 @@
+open class Base {
+}
+
+trait Derived: Base {
+    fun foo() {
+        f1(this@Derived)
+    }
+}
+
+class <error descr="[UNMET_TRAIT_REQUIREMENT] Super trait 'Derived' requires subclasses to extend 'Base'">DerivedImpl()</error>: Derived {}
+object <error descr="[UNMET_TRAIT_REQUIREMENT] Super trait 'Derived' requires subclasses to extend 'Base'">ObjectImpl</error>: Derived {}
+
+fun f1(b: Base) = b
+
+// KT-3006

idea/tests/org/jetbrains/jet/checkers/JetPsiCheckerTestGenerated.java

@@ -255,6 +255,11 @@ public class JetPsiCheckerTestGenerated extends AbstractJetPsiCheckerTest {
             doTest("idea/testData/checker/trivialHierarchyLoop.kt");
         }
         
+        @TestMetadata("unmetTraitRequirements.kt")
+        public void testUnmetTraitRequirements() throws Exception {
+            doTest("idea/testData/checker/unmetTraitRequirements.kt");
+        }
+        
         @TestMetadata("UnreachableCode.kt")
         public void testUnreachableCode() throws Exception {
             doTest("idea/testData/checker/UnreachableCode.kt");