Re: c++/8332: strlen/template interaction causes ICE

Re: c++/8332: strlen/template interaction causes ICE

[Andrew Pinski]

The following reply was made to PR c++/8332; it has been noted by GNATS.

From: Andrew Pinski <pinskia@physics.uc.edu>
To: martin.dorey@bluearc.com
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: c++/8332: strlen/template interaction causes ICE
Date: Wed, 23 Oct 2002 22:05:18 -0700

 This works fine for me on gcc 3.3 i686-pc-linux-gnu.
 It also works on gcc 3.1.1, so it looks like a Debian specific bug, 
 report it to them.
 
 Thanks,
 Andrew Pinski
 

Re: c++/8332: strlen/template interaction causes ICE

[Wolfgang Bangerth]

The following reply was made to PR c++/8332; it has been noted by GNATS.

From: Wolfgang Bangerth <bangerth@ticam.utexas.edu>
To: gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: c++/8332: strlen/template interaction causes ICE
Date: Thu, 7 Nov 2002 17:20:51 -0600 (CST)

 This one may be related to PR 8493.
 
 -------------------------------------------------------------------------
 Wolfgang Bangerth              email:           bangerth@ticam.utexas.edu
                                www: http://www.ticam.utexas.edu/~bangerth
 
 

Re: c++/8332: strlen/template interaction causes ICE

[bangerth]

Synopsis: strlen/template interaction causes ICE

State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Mon Oct 28 13:27:44 2002
State-Changed-Why:
    I _can_ reproduce this. The bug goes away, if strlen is 
    renamed, or if its return type is changed to "int", so I
    assume this has something to do with built-ins. However,
    since the code also SegFaults if we include <string.h>, I
    have no reason to believe that this code is wrong. I'd think
    this is a serious regression from previous releases!
    
    For more information: the SegFault occurs here:
    #0  write_builtin_type (type=0x0) at ../../gcc-3.2/gcc/cp/mangle.c:1569
    #1  0x080bbfc5 in write_type (type=0x401888c0)
        at ../../gcc-3.2/gcc/cp/mangle.c:1399
    #2  0x080bc8df in write_template_args (args=0x4019ec80)
        at ../../gcc-3.2/gcc/cp/mangle.c:1789
    #3  0x080bb13f in write_name (decl=0x401aac40, ignore_local_scope=0)
        at ../../gcc-3.2/gcc/cp/mangle.c:719
    #4  0x080bafd3 in write_encoding (decl=0x401aac40)
        at ../../gcc-3.2/gcc/cp/mangle.c:654
    #5  0x080bd586 in mangle_decl_string (decl=0x401aac40)
        at ../../gcc-3.2/gcc/cp/mangle.c:630
    
    The code in question is
          /* TYPE may still be wchar_t, since that isn't in
    	 integer_type_nodes.  */
          if (type == wchar_type_node)
    	write_char ('w');
          else if (TYPE_FOR_JAVA (type))     <<<<< here
    	write_java_integer_type_codes (type);
          else
    and the reason is that type==0. On one frame higher, this
    code is called from
    	  write_builtin_type (TYPE_MAIN_VARIANT (type));
    Here, type is still!=0, but given the nesting of macros,
    this is the point where I leave the rest to someone else.
    
    Regards
      Wolfgang

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8332

c++/8332: strlen/template interaction causes ICE

[martin.dorey]

>Number:         8332
>Category:       c++
>Synopsis:       strlen/template interaction causes ICE
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Wed Oct 23 21:46:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     martin.dorey@bluearc.com
>Release:        gcc-3.2.1 20021020 (Debian prerelease)
>Organization:
>Environment:
Linux trevithick 2.4.16 #2 Mon Dec 10 15:54:50 GMT 2001 i686 Intel(R) Pentium(R) 4 CPU 2.00GHz GenuineIntel GNU/Linux
>Description:
Bang uptodate Debian testing/unstable g++-3.2 ICEs on this code.  Interestingly, it's already started generating the .s file.

# 1 "playpen.cpp"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "playpen.cpp"

template <typename A1>
void monk2 (A1) {}


unsigned int strlen (const char*);

void monk ()
{
  monk2 (strlen (""));
}

+ g++-3.2 -v -g -W -Wall -pedantic -c playpen.cpp -o playpen.o --save-temps
Reading specs from /usr/lib/gcc-lib/i386-linux/3.2.1/specs
Configured with: /mnt/data/gcc-3.1/gcc-3.2-3.2.1ds3/src/configure -v --enable-languages=c,c++,java,f77,proto,objc,ada --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-gxx-include-dir=/usr/include/c++/3.2 --enable-shared --with-system-zlib --enable-nls --without-included-gettext --enable-__cxa_atexit --enable-java-gc=boehm --enable-objc-gc i386-linux
Thread model: posix
gcc version 3.2.1 20021020 (Debian prerelease)
 /usr/lib/gcc-lib/i386-linux/3.2.1/cpp0 -lang-c++ -D__GNUG__=3 -D__DEPRECATED -D__EXCEPTIONS -v -D__GNUC__=3 -D__GNUC_MINOR__=2 -D__GNUC_PATCHLEVEL__=1 -D__GXX_ABI_VERSION=102 -D__ELF__ -Dunix -D__gnu_linux__ -Dlinux -D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i386__ playpen.cpp -W -Wall -pedantic playpen.ii
GNU CPP version 3.2.1 20021020 (Debian prerelease) (cpplib) (i386 Linux/ELF)
ignoring nonexistent directory "/usr/i386-linux/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/3.2
 /usr/include/c++/3.2/i386-linux
 /usr/include/c++/3.2/backward
 /usr/local/include
 /usr/lib/gcc-lib/i386-linux/3.2.1/include
 /usr/include
End of search list.
 /usr/lib/gcc-lib/i386-linux/3.2.1/cc1plus -fpreprocessed playpen.ii -quiet -dumpbase playpen.cpp -g -W -Wall -pedantic -version -o playpen.s
GNU CPP version 3.2.1 20021020 (Debian prerelease) (cpplib) (i386 Linux/ELF)
GNU C++ version 3.2.1 20021020 (Debian prerelease) (i386-linux)
        compiled by GNU C version 3.2.1 20021020 (Debian prerelease).
playpen.cpp: In function `void monk()':
playpen.cpp:10: 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.

        .file   "playpen.cpp"
        .file 1 "playpen.cpp"
        .section        .debug_abbrev,"",@progbits
.Ldebug_abbrev0:
        .section        .debug_info,"",@progbits
.Ldebug_info0:
        .section        .debug_line,"",@progbits
.Ldebug_line0:
        .text
.Ltext0:
>How-To-Repeat:

>Fix:

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