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Date: Fri, 02 May 2003 19:06:00 -0000
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From: "Giovanni Bajo" <giovannibajo@libero.it>
Subject: Re: c++/10079: With two identical template function signatures gcc crashes instead of emitting "ambiguous" or "duplicate"
Reply-To: "Giovanni Bajo" <giovannibajo@libero.it>
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The following reply was made to PR c++/10079; it has been noted by GNATS.

From: "Giovanni Bajo" <giovannibajo@libero.it>
To: <gcc-gnats@gcc.gnu.org>,
	<stip@mathematik.uni-ulm.de>,
	<gcc-bugs@gcc.gnu.org>,
	<nobody@gcc.gnu.org>,
	<gcc-prs@gcc.gnu.org>
Cc:  
Subject: Re: c++/10079: With two identical template function signatures gcc crashes instead of emitting "ambiguous" or "duplicate"
Date: Fri, 2 May 2003 20:58:00 +0200

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10079
 
 Very weird. I can't compress it more than this:
 ----------------------------------------------------------
 template <bool>
 struct Foo
 {};
 
 template <typename>
 struct Bar
 {};
 
 
 template <typename>
 struct true_t
 {
     enum { value = true };
 };
 
 template <typename T, typename U>
 Foo<(true_t<T>::value && true_t<T>::value)>
 func(T t, U u)
 {}
 
 template <typename T, typename U>
 void func(Bar<T>, Bar<U> )
 {}
 
 int main()
 {
     Bar<void> v;
     func(v, v);
 }
 ----------------------------------------------------------
 pr10079.cpp: In function `int main()':
 pr10079.cpp:30: internal compiler error: Segmentation fault
 Please submit a full bug report,
 
 In my wild guess, the segfault happens while trying to format the error
 message about the ambiguity of the call, which requires printing the
 declaration of the first func<> (that is quite complex).
 
 Reconfirmed on everything (2.95 -> 3.4 CVS 20030430).
 
 Giovanni Bajo