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Subject: [Bug middle-end/61207] [4.9 Regression] Win64 gcc 4.9.0: ICE in in expand_expr_addr_expr_1 at -Os compiling some C++ code
Date: Sat, 07 Mar 2015 11:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61207

Ray Donnelly <mingw.android at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mingw.android at gmail dot com

--- Comment #8 from Ray Donnelly <mingw.android at gmail dot com> ---
Regarding https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61207#c5

It's not a question of being able to get the source code, it's about reducing
the code to the minimum amount that exhibits the bug. In the old days (maybe
still now?) gccbug would be used, now-a-days, creduce works well. Here is the
testcase from Boost:

// reduced test case:

namespace std {
class basic_string typedef string;
class basic_string {
public:
  basic_string(char *, unsigned);
};
}
class A {
public:
  A(char);
  size();
  char *begin();
  *m_begin;
  *m_end;
};
enum output_format {};
namespace std {
class runtime_error {
public:
  runtime_error(string);
};
}
struct B : std::runtime_error {
  B(A m) : runtime_error(std::string(m.begin(), m.size())) {}
};
fn1(int, output_format) {
  B(0);
  B(0);
}

// elapsed time: 30405 seconds

Compiling with MSYS2's mingw64/mingw-w64-x86_64-gcc 4.9.2-4 package with:
/mingw64/bin/g++ -Os testcase.ii

Gives:
internal compiler error: in expand_expr_addr_expr_1, at expr.c:7669