Clean up dead code after spread desugaring

src/ast/ast-literal-reindexer.cc

Index: src/ast/ast-literal-reindexer.cc
diff --git a/src/ast/ast-literal-reindexer.cc b/src/ast/ast-literal-reindexer.cc
index fce33e70b8f7caf9aec7a25aaf3fe1ebfa00344e..8f0f8a23387e9c9d90853c6ed31f8afca8913f29 100644
--- a/src/ast/ast-literal-reindexer.cc
+++ b/src/ast/ast-literal-reindexer.cc
@@ -187,7 +187,15 @@ void AstLiteralReindexer::VisitCompareOperation(CompareOperation* node) {
 
 
 void AstLiteralReindexer::VisitSpread(Spread* node) {
+#if 0
+  // This is reachable because ParserBase::ParseArrowFunctionLiteral calls
+  // ReindexLiterals before calling RewriteDestructuringAssignments.
+  // Breaking test case: var f = ([...a]) => {}
+  // TODO(rossberg): Add a proper TODO here as to what needs to be done.
+  UNREACHABLE();
+#else

[nickie, 2016/01/18 11:34:45]

Andreas, does this stay?

[nickie, 2016/01/18 14:25:39]

We decided the first two lines of the comment stay.

   Visit(node->expression());
+#endif
 }