Ambiguous references do not necessarily cause compilation errors (issue 5736).

runtime/vm/parser.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_PARSER_H_
 #define VM_PARSER_H_
 
 #include "include/dart_api.h"
 
 #include "vm/ast.h"
@@ skipping 117 matching lines @@
                            const char* message_header,
                            const char* format, ...) PRINTF_ATTRIBUTE(4, 5);
 
   // Build an error object containing a formatted error or warning message.
   // A null script means no source and a negative token_pos means no position.
   static RawError* FormatError(const Script& script,
                                intptr_t token_pos,
                                const char* message_header,
                                const char* format,
                                va_list args);
+  static RawError* FormatErrorMsg(const Script& script,
+                                  intptr_t token_pos,
+                                  const char* message_header,
+                                  const char* format, ...)
+    PRINTF_ATTRIBUTE(4, 5);
 
   // Same as FormatError, but appends the new error to the 'prev_error'.
   static RawError* FormatErrorWithAppend(const Error& prev_error,
                                          const Script& script,
                                          intptr_t token_pos,
                                          const char* message_header,
                                          const char* format,
                                          va_list args);
 
  private:
@@ skipping 349 matching lines @@
   void CheckInstanceFieldAccess(intptr_t field_pos, const String& field_name);
   bool ParsingStaticMember() const;
   const Type* ReceiverType(intptr_t type_pos) const;
   bool IsInstantiatorRequired() const;
   bool ResolveIdentInLocalScope(intptr_t ident_pos,
                                 const String &ident,
                                 AstNode** node);
   static const bool kResolveLocally = true;
   static const bool kResolveIncludingImports = false;
 
-  // Resolve a primary identifier in the libary or prefix scope and
+  // Resolve a primary identifier in the library or prefix scope and
   // generate the corresponding AstNode.
+  AstNode* ResolveIdentInCurrentLibraryScope(intptr_t ident_pos,
+                                             const String& ident);
   AstNode* ResolveIdentInPrefixScope(intptr_t ident_pos,
                                      const LibraryPrefix& prefix,
                                      const String& ident);
-  AstNode* ResolveIdentInCurrentLibraryScope(intptr_t ident_pos,
-                                             const String& ident);
 
   // Find class with the given name in the library or prefix scope.
   RawClass* ResolveClassInCurrentLibraryScope(intptr_t ident_pos,
-                                              const String& name);
+                                              const String& name,
+                                              Error* error);
   RawClass* ResolveClassInPrefixScope(intptr_t ident_pos,
                                       const LibraryPrefix& prefix,
-                                      const String& name);
+                                      const String& name,
+                                      Error* error);
 
   // Find name in the library or prefix scope and return the corresponding
   // object (field, class, function etc).
   RawObject* ResolveNameInCurrentLibraryScope(intptr_t ident_pos,
-                                              const String& ident);
+                                              const String& ident,
+                                              Error* error);
   RawObject* ResolveNameInPrefixScope(intptr_t ident_pos,
                                       const LibraryPrefix& prefix,
-                                      const String& name);
+                                      const String& name,
+                                      Error* error);
 
   AstNode* ResolveIdent(intptr_t ident_pos,
                         const String& ident,
                         bool allow_closure_names);
   RawString* ResolveImportVar(intptr_t ident_pos, const String& ident);
   AstNode* OptimizeBinaryOpNode(intptr_t op_pos,
                                 Token::Kind binary_op,
                                 AstNode* lhs,
                                 AstNode* rhs);
   AstNode* ExpandAssignableOp(intptr_t op_pos,
@@ skipping 70 matching lines @@
 
   // Allocate temporary only once per function.
   LocalVariable* expression_temp_;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_