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Date: Tue, 14 Jul 2009 18:15:00 -0000
Subject: [Bug c++/40750]  New: Side-effect of member function call not produced in certain circumstances
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GCC mis-compiles the following code for mysterious reasons. While it should
output "called", it outputs nothing at all

// snip
typedef void Fn() const; 

struct Foo { Fn fn; }; 
void Foo::fn() const { std::cout << "called" << std::endl; } 

int main() { Foo f; f.fn(); }
// snap

Any one of the following makes it show "called" properly:

- Adding "inline" function specifier in the declaration of the function at
class or namespace scope.
- Replacing "Fn fn;" by a declaration with a function declarator "void fn()
const;" 
- Making the function non-const (in the typedef and in the definition of the
function).


-- 
           Summary: Side-effect of member function call not produced in
                    certain circumstances
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: schaub-johannes at web dot de
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40750