java/5227: verification error on JDK 1.3.1 class file

[Daniel Bonniot]

The following reply was made to PR java/5227; it has been noted by GNATS.

From: Daniel Bonniot <Daniel.Bonniot@inria.fr>
To: gcc-gnats@gcc.gnu.org,  Jens.Maurer@gmx.net,  java-prs@gcc.gnu.org, 
 gcc-bugs@gcc.gnu.org,  nobody@gcc.gnu.org,  gcc-prs@gcc.gnu.org
Cc:  
Subject: Re: java/5227: verification error on JDK 1.3.1 class file
Date: Mon, 21 Apr 2003 23:21:18 +0200

 Hi,
 
 I have tried reproducing the following bug, which was reported against 
 gcc version 3.1 20011230 (experimental):
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5227
 
 The bug seems to have been fixed, in gcc version 3.3 20030412 (Debian 
 prerelease):
 $ gcj-3.3 -I/usr/share/java/libgcj-3.3.jar 
 -I/usr/lib/j2se/1.3/jre/lib/rt.jar  -c ReaderThread.class
 IIOPConnection.java: In class `com.sun.corba.se.internal.iiop.ReaderThread':
 IIOPConnection.java: In method 
 `com.sun.corba.se.internal.iiop.ReaderThread.run()':
 IIOPConnection.java:139: warning: unreachable bytecode from 171 to 
 before 174
 IIOPConnection.java:141: warning: unreachable bytecode from 178 to 
 before 180
 
 So there are two warnings, but no verification error anymore.
 
 Just to make sure, I tried to reproduce the bug with an older version of 
 gcj, to check my setup is correct. With gcc version 3.0.4, I do 
 reproduce the bug:
 
 $ gcj-3.0 -I/usr/share/java/libgcj-3.3.jar 
 -I/usr/lib/j2se/1.3/jre/lib/rt.jar  -c ReaderThread.class
 IIOPConnection.java: In class `com.sun.corba.se.internal.iiop.ReaderThread':
 IIOPConnection.java: In method 
 `com.sun.corba.se.internal.iiop.ReaderThread.run()':
 IIOPConnection.java:100: verification error at PC=178
 IIOPConnection.java:100: stack overflow
 
 
 So I suggest to close this bug as fixed. Cheers!
 
 Daniel
 
 PS: gcj 3.3 does generate lots of spurious warnings about unreachable 
 bytecode, like in the above output. Is this a known problem. Should a 
 bug report be filed about them?