https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63454
Bug ID: 63454
Summary: [5 Regression] internal compiler error: canonical
types differ for identical types
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ai.azuma at gmail dot com
Created attachment 33645
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33645&action=edit
Output of -v option and preprocessed file
The following valid code causes an ICE with GCC 5.0.0 20140928.
//=======================================================
template<typename T>
struct A
{
typedef T type;
};
template<typename T>
struct B
{};
template<typename T>
B<typename A<T const>::type>
f(T const &)
{}
template<typename CharT>
struct X
{
typedef CharT char_type;
void memfun()
{
char_type const c[1] = { static_cast<char_type>(0) };
f(c);
}
};
template<typename CharT>
struct Y
{
typedef CharT char_type;
void memfun()
{
char_type const c[1] = { static_cast<char_type>(0) };
f(c);
}
};
template struct X<char>;
template struct Y<char>;
//=======================================================
Note that the above code compiles successfully with 4.9.2 20140924 and 4.8.4
20140925. The reproducer originally comes from a Boost.Log 1.56.0 source file.
