We can't talk about the type if there is no type.
Tested x86_64-pc-linux-gnu, applying to trunk.
commit bc94f519583cdfc705c1bde750a06bbd42537193
Author: Jason Merrill <ja...@redhat.com>
Date: Wed Apr 11 10:08:37 2012 -0400
PR c++/52906
* decl.c (check_tag_decl): Don't complain about attributes if we
don't even have a type.
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index e2f01d5..8b22192 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -4224,7 +4224,7 @@ check_tag_decl (cp_decl_specifier_seq *declspecs)
error ("%<constexpr%> cannot be used for type declarations");
}
- if (declspecs->attributes && warn_attributes)
+ if (declspecs->attributes && warn_attributes && declared_type)
{
location_t loc;
if (!CLASS_TYPE_P (declared_type)
diff --git a/gcc/testsuite/g++.dg/ext/attrib45.C b/gcc/testsuite/g++.dg/ext/attrib45.C
new file mode 100644
index 0000000..0be1322
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/attrib45.C
@@ -0,0 +1,3 @@
+// PR c++/52906
+
+__attribute__ ((__deprecated__)); // { dg-error "does not declare anything" }
