From: ian <ian@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 15 Jun 2015 17:43:02 +0000 (+0000)
Subject: compiler: Don't crash when dumping ast of empty block.
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f39b15c6763ca9e7165f53ad9e1ffd45c1e10c3f;p=thirdparty%2Fgcc.git

compiler: Don't crash when dumping ast of empty block.

Fixes golang/go#10420.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@224487 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/go/gofrontend/ast-dump.cc b/gcc/go/gofrontend/ast-dump.cc
index 850e31a81e53..72b01420aa31 100644
--- a/gcc/go/gofrontend/ast-dump.cc
+++ b/gcc/go/gofrontend/ast-dump.cc
@@ -65,6 +65,12 @@ class Ast_dump_traverse_statements : public Traverse
 
 int Ast_dump_traverse_blocks_and_functions::block(Block * block)
 {
+  if (block == NULL)
+    {
+      this->ast_dump_context_->ostream() << std::endl;
+      return TRAVERSE_EXIT;
+    }
+
   this->ast_dump_context_->print_indent();
   this->ast_dump_context_->ostream() << "{" << std::endl;
   this->ast_dump_context_->indent();
@@ -466,4 +472,4 @@ Ast_dump_context::dump_to_stream(const Expression* expr, std::ostream* out)
 {
   Ast_dump_context adc(out, false);
   expr->dump_expression(&adc);
-}
\ No newline at end of file
+}