objc/4527: Objc 3.0.1 segfaults on Linux i386

objc/4527: Objc 3.0.1 segfaults on Linux i386

[timo.savola]

>Number:         4527
>Category:       objc
>Synopsis:       Objc 3.0.1 segfaults on Linux i386
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Oct 10 16:06:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     timo.savola@iki.fi
>Release:        gcc version 3.0.1 20010811 (Debian prerelease)
>Organization:
>Environment:
i386-linux; Intel Celeron 400 (i686), Debian GNU/Linux testing/unstable, kernel version 2.4.6; GNUstep 1.0.2
>Description:
Compiling an Objective-C source with the following command line caused a segmentation fault in the compiler:

gcc-3.0 -v -save-temps invocation.m -c   -DGNUSTEP -DGNUSTEP_BASE_LIBRARY=1   -DGNU_RUNTIME=1 -DGNUSTEP_BASE_LIBRARY=1 -D_REENTRANT  -fPIC -DGSWARN -O2 -Wno-import -fgnu-runtime -Wall    -I. -I/usr/lib/GNUstep/System/Headers -fgnu-runtime -I/usr/lib/GNUstep/System/Headers -I/usr/include/libxml2/libxml -I/usr/include/libxml2 -fconstant-string-class=NSConstantString -I/home/timo/GNUstep/Library/Headers -I/usr/local/lib/GNUstep/Local/Library/Headers -I/usr/local/lib/GNUstep/Network/Library/Headers -I/usr/lib/GNUstep/System/Library/Headers -I/usr/local/lib/GNUstep/Network/Headers/gnustep -I/home/timo/GNUstep/Headers/gnustep -I/usr/local/lib/GNUstep/Local/Headers/gnustep -I/usr/lib/GNUstep/System/Headers/gnustep  -I/usr/local/lib/GNUstep/Network/Headers/ix86/linux-gnu -I/home/timo/GNUstep/Headers/ix86/linux-gnu -I/usr/local/lib/GNUstep/Local/Headers/ix86/linux-gnu -I/usr/lib/GNUstep/System/Headers/ix86/linux-gnu -I/home/timo/GNUstep/Headers -I/usr/local/lib/GNUstep/Local/Headers -I/usr/local/lib/GNUstep/Network/Headers -I/usr/lib/GNUstep/System/Headers  -o shared_obj/ix86/linux-gnu/gnu-gnu-gnu/invocation.o


Here's the output of the previous command:

Reading specs from /usr/lib/gcc-lib/i386-linux/3.0.1/specs
Configured with: ../src/configure -v --enable-languages=c,c++,java,f77,proto,objc --prefix=/usr --infodir=/share/info --mandir=/share/man --enable-shared --with-gnu-as --with-gnu-ld --with-system-zlib --enable-long-long --enable-nls --without-included-gettext --disable-checking --enable-threads=posix --enable-java-gc=boehm --with-cpp-install-dir=bin --enable-objc-gc i386-linux
Thread model: posix
gcc version 3.0.1 20010811 (Debian prerelease)
 /usr/lib/gcc-lib/i386-linux/3.0.1/cpp0 -lang-objc -v -I. -I/usr/lib/GNUstep/System/Headers -I/usr/lib/GNUstep/System/Headers -I/usr/include/libxml2/libxml -I/usr/include/libxml2 -I/home/timo/GNUstep/Library/Headers -I/usr/local/lib/GNUstep/Local/Library/Headers -I/usr/local/lib/GNUstep/Network/Library/Headers -I/usr/lib/GNUstep/System/Library/Headers -I/usr/local/lib/GNUstep/Network/Headers/gnustep -I/home/timo/GNUstep/Headers/gnustep -I/usr/local/lib/GNUstep/Local/Headers/gnustep -I/usr/lib/GNUstep/System/Headers/gnustep -I/usr/local/lib/GNUstep/Network/Headers/ix86/linux-gnu -I/home/timo/GNUstep/Headers/ix86/linux-gnu -I/usr/local/lib/GNUstep/Local/Headers/ix86/linux-gnu -I/usr/lib/GNUstep/System/Headers/ix86/linux-gnu -I/home/timo/GNUstep/Headers -I/usr/local/lib/GNUstep/Local/Headers -I/usr/local/lib/GNUstep/Network/Headers -I/usr/lib/GNUstep/System/Headers -D__GNUC__=3 -D__GNUC_MINOR__=0 -D__GNUC_PATCHLEVEL__=1 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__OPTIMIZE__ -D__STDC_HOSTED__=1 -Wno-import -Wall -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i386__ -D__PIC__ -D__pic__ -DGNUSTEP -DGNUSTEP_BASE_LIBRARY=1 -DGNU_RUNTIME=1 -DGNUSTEP_BASE_LIBRARY=1 -D_REENTRANT -DGSWARN invocation.m invocation.mi
ignoring nonexistent directory "/home/timo/GNUstep/Library/Headers"
ignoring nonexistent directory "/usr/local/lib/GNUstep/Local/Library/Headers"
ignoring nonexistent directory "/usr/local/lib/GNUstep/Network/Library/Headers"
ignoring nonexistent directory "/usr/lib/GNUstep/System/Library/Headers"
ignoring nonexistent directory "/usr/local/lib/GNUstep/Network/Headers/gnustep"
ignoring nonexistent directory "/home/timo/GNUstep/Headers/gnustep"
ignoring nonexistent directory "/usr/local/lib/GNUstep/Local/Headers/gnustep"
ignoring nonexistent directory "/usr/local/lib/GNUstep/Network/Headers/ix86/linux-gnu"
ignoring nonexistent directory "/home/timo/GNUstep/Headers/ix86/linux-gnu"
ignoring nonexistent directory "/usr/local/lib/GNUstep/Local/Headers/ix86/linux-gnu"
ignoring nonexistent directory "/usr/local/lib/GNUstep/Local/Headers"
ignoring nonexistent directory "/usr/local/lib/GNUstep/Network/Headers"
GNU CPP version 3.0.1 20010811 (Debian prerelease) (cpplib) (i386 Linux/ELF)
ignoring nonexistent directory "/usr/i386-linux/include"
ignoring duplicate directory "/usr/lib/GNUstep/System/Headers"
ignoring duplicate directory "/usr/lib/GNUstep/System/Headers"
#include "..." search starts here:
#include <...> search starts here:
 .
 /usr/lib/GNUstep/System/Headers
 /usr/include/libxml2/libxml
 /usr/include/libxml2
 /usr/lib/GNUstep/System/Headers/gnustep
 /usr/lib/GNUstep/System/Headers/ix86/linux-gnu
 /home/timo/GNUstep/Headers
 /usr/local/include
 /usr/lib/gcc-lib/i386-linux/3.0.1/include
 /usr/include
End of search list.
 /usr/lib/gcc-lib/i386-linux/3.0.1/cc1obj -fpreprocessed invocation.mi -quiet -dumpbase invocation.m -O2 -Wno-import -Wall -version -fPIC -fgnu-runtime -fgnu-runtime -fconstant-string-class=NSConstantString -o invocation.s
GNU CPP version 3.0.1 20010811 (Debian prerelease) (cpplib) (i386 Linux/ELF)
GNU Objective-C version 3.0.1 20010811 (Debian prerelease) (i386-linux)
        compiled by GNU C version 3.0.1 20010811 (Debian prerelease).
invocation.m:52: 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.


The preprocessed source of "invocation.m" is included as an attachment.
>How-To-Repeat:
See the command line included in the Description and the File Attachment.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
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Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="invocation.mi.bz2"

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Re: objc/4527: Objc 3.0.1 segfaults on Linux i386

[nicola]

Synopsis: Objc 3.0.1 segfaults on Linux i386

State-Changed-From-To: open->closed
State-Changed-By: nicola
State-Changed-When: Tue Sep 17 07:32:33 2002
State-Changed-Why:
    Hi - this is a brilliant report :-)
    I could slim down your testcase to the following one -
    
    /* Built from PR/4527 by Nicola Pero.  Amazingly, this testcase fails
       to *compile* on GCC 2.95.4.  Removing the inherited protocol makes
       it work.  This was fixed in later compilers, eg GCC 3.3 compiles it
       Ok.  */
    
    @protocol NodeHandler
    - (void) methodA;
    @end
    
    @protocol InvocationHandler <NodeHandler>
    - (void) methodB;
    @end
    
    @interface InvocationHandler <InvocationHandler>
    @end
    
    @implementation InvocationHandler
    - (void) methodA { ; }
    - (void) methodB { ; }
    @end
    
    int main (void)
    {
      return 0;
    }
    
    It's amazing that even 2.95 fails to compile this program.
    I tried with GCC 3.3 from CVS, and it compiles the program
    fine! :-)
    
    I'm not sure at what stage this was fixed, but there
    were quite a lot of fixes and improvements to protocol
    compilations, once of those must have fixed your problem.
    
    I'm not investigating it any further, since it seems to
    be working perfectly well with GCC 3.3.
    
    Thanks for reporting.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=4527