http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57196
Bug #: 57196
Summary: [4.8 regression] Bogus "aggregate ... has incomplete
type and cannot be defined"
Classification: Unclassified
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: [email protected]
ReportedBy: [email protected]
Google ref: b/8853908
Test case reduced from gUnit.
#include <set>
#include <string>
using std::set;
using std::string;
int& IsNullLiteralHelper(...);
template <size_t> struct EqHelper { };
void Fn() {
EqHelper<sizeof IsNullLiteralHelper(set<int>{1})> eq1; // ok
EqHelper<sizeof IsNullLiteralHelper(set<string>())> eq2; // ok
EqHelper<sizeof IsNullLiteralHelper(set<string>{"foo"})> eq3; // error
}
Using trunk built at r198689:
g++ -std=c++11 -c tt.cc
tt.cc: In function ‘void Fn()’:
tt.cc:14:60: error: aggregate ‘EqHelper<sizeof
(IsNullLiteralHelper(std::set<std::basic_string<char>
>(std::initializer_list<std::basic_string<char> >{((const
std::basic_string<char>*)(& const std::basic_string<char>
[1]{std::basic_string<char>(((const char*)"foo"), (*(const
std::allocator<char>*)(& std::allocator<char>())))})), 1u}, (*(const
std::less<std::basic_string<char> >*)(& std::less<std::basic_string<char>
>())), (*(const std::allocator<std::basic_string<char> >*)(&
std::allocator<std::basic_string<char> >())))))> eq3’ has incomplete type and
cannot be defined
EqHelper<sizeof IsNullLiteralHelper(set<string>{"foo"})> eq3;
^
