Issue 3271. Top-level function 'main' should not have parameters

compiler/java/com/google/dart/compiler/resolver/MemberBuilder.java

Index: compiler/java/com/google/dart/compiler/resolver/MemberBuilder.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/MemberBuilder.java b/compiler/java/com/google/dart/compiler/resolver/MemberBuilder.java
index caf651f3857365100bf36395a9d32d7eb4a5fc6f..5b23fc7b755cbec1327de6bfcb1ebed434cd71cc 100644
--- a/compiler/java/com/google/dart/compiler/resolver/MemberBuilder.java
+++ b/compiler/java/com/google/dart/compiler/resolver/MemberBuilder.java
@@ -5,6 +5,7 @@
 package com.google.dart.compiler.resolver;
 
 import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Objects;
 import com.google.dart.compiler.DartCompilerContext;
 import com.google.dart.compiler.ErrorCode;
 import com.google.dart.compiler.ast.ASTVisitor;
@@ -152,6 +153,7 @@ public class MemberBuilder {
         assertTopLevel(method);
       }
       if (element != null) {
+        checkTopLevelMainFunction(method);
         checkModifiers(element, method);
         recordElement(method, element);
         recordElement(method.getName(), element);
@@ -448,6 +450,17 @@ public class MemberBuilder {
       return ElementKind.NONE;
     }
 
+    /**
+     * Checks that top-level "main()" has no parameters.
+     */
+    private void checkTopLevelMainFunction(DartMethodDefinition method) {
+      if (Objects.equal(method.getName().toSource(), "main")
+          && currentHolder instanceof LibraryElement
+          && !method.getFunction().getParameters().isEmpty()) {
+        resolutionError(method.getName(), ResolverErrorCode.MAIN_FUNCTION_PARAMETERS);
+      }
+    }
+
     private void checkModifiers(MethodElement element, DartMethodDefinition method) {
       Modifiers modifiers = method.getModifiers();
       boolean isNonFactoryConstructor = Elements.isNonFactoryConstructor(element);