Fix legacy const for-of/in destructuring

src/pattern-rewriter.cc

Index: src/pattern-rewriter.cc
diff --git a/src/pattern-rewriter.cc b/src/pattern-rewriter.cc
index 4bfeae4400ef2b75e5f35c2a7cf07a095828a79d..51cc33998da866d8293283dd1c3db68fc7365efe 100644
--- a/src/pattern-rewriter.cc
+++ b/src/pattern-rewriter.cc
@@ -175,7 +175,7 @@ void Parser::PatternRewriter::VisitVariableProxy(VariableProxy* pattern) {
           factory()->NewExpressionStatement(initialize, RelocInfo::kNoPosition),
           zone());
     }
-  } else if (value != nullptr && (descriptor_->needs_init ||
+  } else if (value != nullptr && (descriptor_->mode == CONST_LEGACY ||

[adamk, 2015/10/05 22:17:51]

I like this better, too; the old code is very odd looking.

                                   IsLexicalVariableMode(descriptor_->mode))) {
     // Constant initializations always assign to the declared constant which
     // is always at the function scope level. This is only relevant for