added better error reporting, showing the real location of the kotlin code that causes the problem

js/js.translator/src/org/jetbrains/k2js/translate/reference/CallTranslator.java

@@ -19,9 +19,13 @@ package org.jetbrains.k2js.translate.reference;
 import com.google.common.collect.Lists;
 import com.google.dart.compiler.backend.js.ast.*;
 import com.google.dart.compiler.util.AstUtil;
+import com.intellij.lang.ASTNode;
+import com.intellij.psi.PsiElement;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.descriptors.*;
+import org.jetbrains.jet.lang.diagnostics.DiagnosticUtils;
+import org.jetbrains.jet.lang.resolve.BindingContextUtils;
 import org.jetbrains.jet.lang.resolve.calls.ExpressionAsFunctionDescriptor;
 import org.jetbrains.jet.lang.resolve.calls.ResolvedCall;
 import org.jetbrains.jet.lang.resolve.calls.VariableAsFunctionResolvedCall;
@@ -124,8 +128,24 @@ public final class CallTranslator extends AbstractTranslator {
     @NotNull
     private JsExpression intrinsicInvocation() {
         assert descriptor instanceof FunctionDescriptor;
-        Intrinsic intrinsic = context().intrinsics().getFunctionIntrinsic((FunctionDescriptor) descriptor);
+        try {
-        return intrinsic.apply(callParameters.getThisOrReceiverOrNull(), arguments, context());
+            Intrinsic intrinsic = context().intrinsics().getFunctionIntrinsic((FunctionDescriptor) descriptor);
+            return intrinsic.apply(callParameters.getThisOrReceiverOrNull(), arguments, context());
+        } catch (RuntimeException e) {
+            PsiElement element = BindingContextUtils.descriptorToDeclaration(bindingContext(), descriptor);
+            if (element == null) {
+                element = BindingContextUtils.descriptorToDeclaration(bindingContext(), descriptor.getOriginal());
+            }
+            if (element == null && descriptor instanceof ASTNode) {
+                element = DiagnosticUtils.getClosestPsiElement((ASTNode) descriptor);
+            }
+            if (element != null) {
+                String location = DiagnosticUtils.atLocation(element);
+                throw new IllegalStateException(e.getMessage() + " at " + location, e);
+            } else {
+                throw e;
+            }
+        }
     }
 
     private boolean isConstructor() {

js/js.translator/src/org/jetbrains/k2js/translate/reference/QualifiedExpressionTranslator.java

@@ -17,11 +17,15 @@
 package org.jetbrains.k2js.translate.reference;
 
 import com.google.dart.compiler.backend.js.ast.JsExpression;
+import com.intellij.lang.ASTNode;
+import com.intellij.psi.PsiElement;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor;
 import org.jetbrains.jet.lang.descriptors.NamespaceDescriptor;
+import org.jetbrains.jet.lang.diagnostics.DiagnosticUtils;
 import org.jetbrains.jet.lang.psi.*;
+import org.jetbrains.jet.lang.resolve.BindingContextUtils;
 import org.jetbrains.k2js.translate.context.TranslationContext;
 
 import static org.jetbrains.k2js.translate.general.Translation.translateAsExpression;
@@ -68,7 +72,16 @@ public final class QualifiedExpressionTranslator {
                 ((JetSimpleNameExpression)selector, receiver, callType, context);
         }
         if (selector instanceof JetCallExpression) {
-            return CallExpressionTranslator.translate((JetCallExpression)selector, receiver, callType, context);
+            try {
+                return CallExpressionTranslator.translate((JetCallExpression)selector, receiver, callType, context);
+            } catch (RuntimeException e) {
+                if (selector != null) {
+                    String location = DiagnosticUtils.atLocation(selector);
+                    throw new IllegalStateException(e.getMessage() + " at " + location, e);
+                } else {
+                    throw e;
+                }
+            }
         }
         //TODO: never get there
         if (selector instanceof JetSimpleNameExpression) {