A broken diagnostic is issued for the following invalid code snippet on trunk:
================================
template<int> struct A
{
template<int> struct B;
};
int i = A<0>::B<0>::X::Y;
================================
bug.cc:6:21: error: 'A<0>::B<#'tree_vec' not supported by pp_c_expression#,
#'tree_vec' not supported by pp_c_expression#>::X' has not been declared
GCC 4.3.x and 4.4.x issue a sensible error message:
bug.cc:6: error: 'A::B::X' has not been declared
GCC 4.2.x issues an even better error message:
bug.cc:6: error: 'struct A<0>::B<0>::X' has not been declared
--
Summary: [4.5 Regression] Broken diagnostic: 'tree_vec' not
supported by pp_c_expression
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Keywords: diagnostic, monitored
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: reichelt at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42218
