[Jython-bugs] [ jython-Bugs-589148 ] Syntax error -> jython infinite loop

[<no...@so...>]

Bugs item #589148, was opened at 2002-07-31 15:01
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=112867&aid=589148&group_id=12867

Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Thorstein Thorsteinsson (thorstein)
Assigned to: Nobody/Anonymous (nobody)
Summary: Syntax error -> jython infinite loop

Initial Comment:
The following ex.py:
------------------
a = 1
if a = 1:
    print "Success!"
------------------
leads to an infinite loop somewhere in the Jython
interpreter. This only happens when the code is
executed non-interactively, an interactive session
correctly signals the syntax error in line 2.

Output from jython -v ex.py
----------------------------------------
jython -v ex.py 
import: 'exceptions' as org.python.core.exceptions 
in builtin modules
import: 'site' as /home/tthorste/jython-
2.1/Lib/site$py.class
import: 'sys' as sys in builtin modules
import: 'os' as org.python.modules.os in builtin 
modules
import: 'javaos' as /home/tthorste/jython-
2.1/Lib/javaos$py.class
import: 'java' as java package
import: 'File' as java class
import: 'BufferedReader' as java class
import: 'InputStreamReader' as java class
import: 'IOException' as java class
import: 'javapath' as /home/tthorste/jython-
2.1/Lib/javapath$py.class
import: 'System' as java class
import: 'UserDict' as /home/tthorste/jython-
2.1/Lib/UserDict$py.class
import: 'string' as /home/tthorste/jython-
2.1/Lib/string$py.class
import: 'strop' not found (=> ImportError)
import: 're' as /home/tthorste/jython-
2.1/Lib/re$py.class
import: 'sre' as /home/tthorste/jython-
2.1/Lib/sre$py.class
import: 'sre_compile' as /home/tthorste/jython-
2.1/Lib/sre_compile$py.class
import: '_sre' as org.python.modules._sre in builtin 
modules
import: 'sre_constants' as /home/tthorste/jython-
2.1/Lib/sre_constants$py.class
import: 'sre_parse' as /home/tthorste/jython-
2.1/Lib/sre_parse$py.class
import: 'copy_reg' as /home/tthorste/jython-
2.1/Lib/copy_reg$py.class
import: 'types' as org.python.modules.types in 
builtin modules
import: 'thread' as org.python.modules.thread in 
builtin modules
import: 'sitecustomize' not found (=> ImportError)
----------------------------------------
then jython hangs, using lots of CPU:
> ps -ef | grep java
... /usr/java1.2/jre/bin/../bin/sparc/native_threads
/java -Dpython.home=/home/...
----------------------------------------
I'm running on Solaris 2.8 with jre 1.2 version 2.1 of
Jython.

> jython --version
Jython 2.1 on java (JIT: sunwjit)
>

(Jython downloaded on July 15th.)
----------------------------------------

But thanks for doing a great job.
Thorstein

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=112867&aid=589148&group_id=12867