compiler: Don't crash on invalid array type declarations.

Fixes golang/go#12937. Change-Id: I4ca4e99ce1791b4d3556fc122643a1dc89a752e7 Reviewed-on: https://go-review.googlesource.com/16233 Reviewed-by: Ian Lance Taylor <[email protected]>
golang · Jan 26, 2016 · 721c778 · 721c778
1 parent 731941c
commit 721c778
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/go/gogo.cc b/go/gogo.cc
@@ -2699,6 +2699,15 @@ Gogo::lower_parse_tree()
 {
   Lower_parse_tree lower_parse_tree(this, NULL);
   this->traverse(&lower_parse_tree);
+
+  // There might be type definitions that involve expressions such as the
+  // array length.  Make sure to lower these expressions as well.  Otherwise,
+  // errors hidden within a type can introduce unexpected errors into later
+  // passes.
+  for (std::vector<Type*>::iterator p = this->verify_types_.begin();
+       p != this->verify_types_.end();
+       ++p)
+    Type::traverse(*p, &lower_parse_tree);
 }
 
 // Lower a block.