Re: c++/4926: Segmentation Fault on Legal Code

Re: c++/4926: Segmentation Fault on Legal Code

[nathan]

Synopsis: Segmentation Fault on Legal Code

State-Changed-From-To: open->analyzed
State-Changed-By: nathan
State-Changed-When: Thu Apr 25 09:39:51 2002
State-Changed-Why:
    confirmed

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=4926

Re: c++/4926: Segmentation Fault on Legal Code

[Wolfgang Bangerth]

The following reply was made to PR c++/4926; it has been noted by GNATS.

From: Wolfgang Bangerth <bangerth@ticam.utexas.edu>
To: gcc-bugs@gcc.gnu.org, <gcc-gnats@gcc.gnu.org>
Cc:  
Subject: Re: c++/4926: Segmentation Fault on Legal Code
Date: Fri, 1 Nov 2002 14:31:33 -0600 (CST)

 It's too bad that templates with typeof are still broken in some places, 
 since the (standards conforming) workarounds are also not working always. 
 Here's a redux of PR 4926:
 --------------------------------------
 template <unsigned> struct X { typedef int Type; };
 template <typename T> struct Y { char array[1]; };
 
 template<typename T> Y<T> P(T);  // acts as "Y<typeof(T)>"
 
 struct F { int operator()() const; };
 
 template <typename T>
 typename X<sizeof(P(  T()()  ).array)>::Type  foo();
 
 int main() { foo<F>(); };
 --------------------------------------
 By changing F::operator() into a "regular" member function, all sorts of 
 other bugs can be triggered before the compiler finally crashed :-(
 
 Regards
   Wolfgang
 
 -------------------------------------------------------------------------
 Wolfgang Bangerth              email:           bangerth@ticam.utexas.edu
                                www: http://www.ticam.utexas.edu/~bangerth
 
 

c++/4926: Segmentation Fault on Legal Code

[anthwil]

>Number:         4926
>Category:       c++
>Synopsis:       Segmentation Fault on Legal Code
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 22 02:06:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Anthony Williams
>Release:        gcc-3.0.1
>Organization:
>Environment:
sparc-solaris-2.7
>Description:
Reading specs from /usr/local/lib/gcc-lib/sparc-sun-solaris2.7/3.0.1/specs
Configured with: ../configure --with-as=/usr/local/bin/as --with-ld=/usr/local/bin/ld
Thread model: posix
gcc version 3.0.1
 /usr/local/lib/gcc-lib/sparc-sun-solaris2.7/3.0.1/cpp0 -lang-c++ -D__GNUG__=3 -D__GXX_DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -v -D__GNUC__=3 -D__GNUC_MINOR__=0 -D__GNUC_PATCHLEVEL__=1 -Dsparc -Dsun -Dunix -D__svr4__ -D__SVR4 -D__sparc__ -D__sun__ -D__unix__ -D__svr4__ -D__SVR4 -D__sparc -D__sun -D__unix -Asystem=unix -Asystem=svr4 -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_XOPEN_SOURCE=500 -D_LARGEFILE_SOURCE=1 -D_LARGEFILE64_SOURCE=1 -D__EXTENSIONS__ -D__GCC_NEW_VARARGS__ -Acpu=sparc -Amachine=sparc gcc_et_bug.cpp gcc_et_bug.ii
GNU CPP version 3.0.1 (cpplib) (sparc)
ignoring nonexistent directory "/usr/local/sparc-sun-solaris2.7/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include/g++-v3
 /usr/local/include/g++-v3/sparc-sun-solaris2.7
 /usr/local/include/g++-v3/backward
 /usr/local/include
 /usr/local/lib/gcc-lib/sparc-sun-solaris2.7/3.0.1/include
 /usr/include
End of search list.
 /usr/local/lib/gcc-lib/sparc-sun-solaris2.7/3.0.1/cc1plus -fpreprocessed gcc_et_bug.ii -quiet -dumpbase gcc_et_bug.cpp -version -o gcc_et_bug.s
GNU CPP version 3.0.1 (cpplib) (sparc)
GNU C++ version 3.0.1 (sparc-sun-solaris2.7)
        compiled by GNU C version 3.0.1.
gcc_et_bug.cpp: In function `int main()':
gcc_et_bug.cpp:67: Internal error: Segmentation Fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
>How-To-Repeat:
Compile the attached file
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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