compiler: Fix crash when tracked field used in global initializer.

From-SVN: r218722

diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc
index 21f6cd6c3d89b0cccfbcbc3faf33c944e3293b8b..61b80452d9979ab0f6d92f0cd3e5a5420d6852f6 100644 (file)
--- a/gcc/go/gofrontend/expressions.cc
+++ b/gcc/go/gofrontend/expressions.cc
@@ -10731,7 +10731,7 @@ Field_reference_expression::do_lower(Gogo* gogo, Named_object* function,
     return this;
 
   // References from functions generated by the compiler don't count.
-  if (function->func_value()->is_type_specific_function())
+  if (function != NULL && function->func_value()->is_type_specific_function())
     return this;
 
   // We have found a reference to a tracked field.  Build a call to