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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/52718] -Wzero-as-null-pointer-constant: misleading location for 0 as default argument
Date: Thu, 01 Nov 2012 20:52:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52718

--- Comment #15 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-01 20:52:15 UTC ---
This is what I meant when I said that the issue is different, and is much more
general than -Wzero-as-null-pointer-constant. Consider, eg, with -Woverflow:

#pragma GCC system_header

class Foo
{
 public:
  Foo(signed char);
};

class Bar
{
 public:
  Bar(Foo = 10000);
};