JS backend: report expression location on error in StringTemplateTranslator.

(cherry picked from commit a2765d3)

js/js.translator/src/org/jetbrains/k2js/translate/expression/StringTemplateTranslator.java

@@ -34,10 +34,10 @@ import org.jetbrains.k2js.translate.intrinsic.functions.patterns.NamePredicate;
 
 import java.util.Collections;
 
+import static org.jetbrains.k2js.translate.utils.ErrorReportingUtils.message;
 import static org.jetbrains.k2js.translate.utils.JsAstUtils.sum;
 import static org.jetbrains.k2js.translate.utils.JsDescriptorUtils.getNameIfStandardType;
 
-
 public final class StringTemplateTranslator extends AbstractTranslator {
     private final JetStringTemplateEntry[] expressionEntries;
 
@@ -47,14 +47,12 @@ public final class StringTemplateTranslator extends AbstractTranslator {
         return (new StringTemplateTranslator(expression, context).translate());
     }
 
-
-
     private StringTemplateTranslator(@NotNull JetStringTemplateExpression expression,
                                      @NotNull TranslationContext context) {
         super(context);
 
         expressionEntries = expression.getEntries();
-        assert expressionEntries.length != 0 : "String template must have one or more entries.";
+        assert expressionEntries.length != 0 : message(expression, "String template must have one or more entries.");
     }
 
     @NotNull

js/js.translator/testFiles/expression/stringTemplates/cases/stringValues.kt

@@ -1,5 +1,10 @@
 package foo
 
+// test String template must have one or more entries.
+public class Fe {
+  fun open(method:String, url: String, async: Boolean = true, user: String = "", password: String = "") = "$method $url $async $user $password"
+}
+
 fun box(): Boolean {
     val a = "abc"
     val b = "def"
@@ -10,5 +15,5 @@ fun box(): Boolean {
     val v1 = null
     if ("returns null null" != "returns $v1 ${null}") return false
 
-    return true
+    return Fe().open("22", "33") == "22 33 true  "
 }