libgcj/5671: verify.cc problem merging local variables
toddastock@yahoo.com
toddastock@yahoo.com
Tue Feb 12 10:53:00 GMT 2002
>Number: 5671
>Category: libgcj
>Synopsis: verify.cc problem merging local variables
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Feb 12 10:26:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:
>Release: 3.1 20020211 (experimental)
>Organization:
>Environment:
System: Linux escher 2.4.9-21 #1 Thu Jan 17 14:16:30 EST 2002 i686 unknown
Architecture: i686
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ./configure --enable-threads=posix --prefix=/home/tstock/local --disable-shared --enable-languages=c++,java
>Description:
During the merging of the local variables if the previous variable is an interface then running through the superclasses leads you directly to NULL eventually thus causing a segmentation fault.
>How-To-Repeat:
import java.io.*;
import java.util.*;
public class Test
{
public static void main(String[] args)
{
new Test().doit();
}
public void doit( )
{
String x = "abc";
try
{
Properties props = new Properties();
Enumeration enum = props.propertyNames();
}
catch( Exception e )
{
}
String _x = "def";
try
{
Properties props = new Properties();
Enumeration enum = props.propertyNames();
}
catch( Exception e )
{
}
}
}
>Fix:
Index: libjava/verify.cc
===================================================================
RCS file: /cvsroot/gcc/gcc/libjava/verify.cc,v
retrieving revision 1.35
diff -r1.35 verify.cc
679c679
< while (true)
---
> while (true && k!=NULL)
686a687,692
> if( k == NULL )
> {
> *this = old_type;
> changed = true;
> }
> else
>Release-Note:
>Audit-Trail:
>Unformatted:
More information about the Gcc-bugs
mailing list