From d111e30ef36f4c1f8e398fa48242eacb4b5da1b5 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Wed, 7 Mar 2012 21:53:34 +0000
Subject: [PATCH] compiler: Don't crash if writing type functions too late due
 to error.

From-SVN: r185080
---
 gcc/go/gofrontend/gogo.h   | 5 +++++
 gcc/go/gofrontend/types.cc | 6 ++++++
 2 files changed, 11 insertions(+)

diff --git a/gcc/go/gofrontend/gogo.h b/gcc/go/gofrontend/gogo.h
index 008c8a09872c..6c77c3bd9e94 100644
--- a/gcc/go/gofrontend/gogo.h
+++ b/gcc/go/gofrontend/gogo.h
@@ -398,6 +398,11 @@ class Gogo
   void
   write_specific_type_functions();
 
+  // Whether we are done writing out specific type functions.
+  bool
+  specific_type_functions_are_written() const
+  { return this->specific_type_functions_are_written_; }
+
   // Traverse the tree.  See the Traverse class.
   void
   traverse(Traverse*);
diff --git a/gcc/go/gofrontend/types.cc b/gcc/go/gofrontend/types.cc
index d3a75f425d14..03f1b3ea0c6e 100644
--- a/gcc/go/gofrontend/types.cc
+++ b/gcc/go/gofrontend/types.cc
@@ -1790,6 +1790,12 @@ Type::write_specific_type_functions(Gogo* gogo, Named_type* name,
 {
   Location bloc = Linemap::predeclared_location();
 
+  if (gogo->specific_type_functions_are_written())
+    {
+      go_assert(saw_errors());
+      return;
+    }
+
   Named_object* hash_fn = gogo->start_function(hash_name, hash_fntype, false,
 					       bloc);
   gogo->start_block(bloc);
-- 
2.47.2