https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63151
Bug ID: 63151
Summary: Accessibility error when brace-constructing base class
with protected defaulted constructor and member
variable
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: lukeallardyce at gmail dot com
struct Foo
{
protected:
Foo() = default;
int t;
};
struct Bar : public Foo
{
Bar(): Foo{} { }
};
g++ -std=c++1y -c test.cpp
test.cpp: In constructor 'Bar::Bar()':
test.cpp:4:3: error: 'Foo::Foo()' is protected
Foo() = default;
^
test.cpp:12:14: error: within this context
Bar(): Foo{} { }
The problem seems to be an astral conjunction of the braces, the defaulted base
class constructor, and the presence of a member variable in the base class.
Removing any one of these gives no error:
class Foo
{
protected:
Foo() {} // Fine
int t;
};
class Foo
{
protected:
Foo() = default; // Also fine
};
class Bar : public Foo
{
Bar(): Foo() { } // Also fine
};
Tested on:
Linux (Arch):
gcc version 4.9.1 (GCC)
OSX:
gcc version 4.9.1 (MacPorts gcc49 4.9.1_0)
Windows:
gcc version 4.9.0 (x86_64-win32-seh-rev2, Built by MinGW-W64 project)
