Recent changes to bugs

No DISPATCH member for op 43

Matthew Digman — Tue, 03 Oct 2017 00:39:06 -0000

I am getting this error, code example to produce it attached:
~~~
pychecker_fail_demo.py:7: INTERNAL ERROR -- STOPPED PROCESSING FUNCTION --
Traceback (most recent call last):
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pychecker/warn.py", line 242, in _checkFunction
_checkCode(code, codeSource)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pychecker/warn.py", line 155, in _checkCode
raise NotImplementedError('No DISPATCH member for op %r' % op)
NotImplementedError: No DISPATCH member for op 43
~~~

List prepend [0:0] triggers : INTERNAL ERROR -- STOPPED PROCESSING FUNCTION

Dave Miller — Mon, 08 Aug 2016 17:56:34 -0000

List prepend triggers : INTERNAL ERROR -- STOPPED PROCESSING FUNCTION

===== FILE: bad_pychecker.py =====

!/usr/bin/env python

import sys
import os

Find my dir

try:
mydir=os.path.dirname(os.path.realpath(file))
except:
try:
mydir=os.path.dirname(os.path.realpath(sys.argv[0]))
except:
mydir='.'

sys.path[0:0] = [mydir, os.path.join(mydir,'..','cli_lib'),]

print('PYTHON_PATH=\n %s' % '\n '.join(sys.path))

===== OUTPUT =====
shell> pychecker --version
0.8.18

shell> pychecker bad_pychecker.py
Processing module bad_pychecker (bad_pychecker.py)...
PYTHON_PATH=
/export/home/tibco/qa_helper
/export/home/tibco/qa_helper/../cli_lib

/usr/lib/python26.zip
/usr/lib/python2.6
/usr/lib/python2.6/plat-sunos5
/usr/lib/python2.6/lib-tk
/usr/lib/python2.6/lib-old
/usr/lib/python2.6/lib-dynload
/usr/lib/python2.6/site-packages
/usr/lib/python2.6/vendor-packages
/usr/lib/python2.6/vendor-packages/gst-0.10
/usr/lib/python2.6/vendor-packages/gtk-2.0

Warnings...

bad_pychecker.py:15: INTERNAL ERROR -- STOPPED PROCESSING FUNCTION --
Traceback (most recent call last):
File "/usr/lib/python2.6/site-packages/pychecker/warn.py", line 242, in _checkFunction
_checkCode(code, codeSource)
File "/usr/lib/python2.6/site-packages/pychecker/warn.py", line 155, in _checkCode
raise NotImplementedError('No DISPATCH member for op %r' % op)
NotImplementedError: No DISPATCH member for op 43

#338 decimal.py:1997: INTERNAL ERROR -- STOPPED PROCESSING FUNCTION --

Martin Mokrejs — Mon, 28 Dec 2015 17:32:32 -0000

Python developers feel this is not a decimal.py issue but in pychecker: see http://bugs.python.org/issue25965

decimal.py:1997: INTERNAL ERROR -- STOPPED PROCESSING FUNCTION --

Martin Mokrejs — Mon, 28 Dec 2015 17:31:08 -0000

$ pychecker testcase.py
Processing module testcase (testcase.py)...

Warnings...

[system path]/decimal.py:1345: INTERNAL ERROR -- STOPPED PROCESSING FUNCTION --
Traceback (most recent call last):
File "/usr/lib64/python2.7/site-packages/pychecker/warn.py", line 242, in _checkFunction
_checkCode(code, codeSource)
File "/usr/lib64/python2.7/site-packages/pychecker/warn.py", line 155, in _checkCode
raise NotImplementedError('No DISPATCH member for op %r' % op)
NotImplementedError: No DISPATCH member for op 28

[system path]/decimal.py:1430: Invalid arguments to (rdivmod), got 3, expected 2
[system path]/decimal.py:1437: Invalid arguments to (mod), got 3, expected 2
[system path]/decimal.py:1464: Invalid arguments to (rmod), got 3, expected 2
[system path]/decimal.py:1546: Invalid arguments to (floordiv), got 3, expected 2
[system path]/decimal.py:1574: Invalid arguments to (rfloordiv), got 3, expected 2
[system path]/decimal.py:1997: INTERNAL ERROR -- STOPPED PROCESSING FUNCTION --
Traceback (most recent call last):
File "/usr/lib64/python2.7/site-packages/pychecker/warn.py", line 242, in _checkFunction
_checkCode(code, codeSource)
File "/usr/lib64/python2.7/site-packages/pychecker/warn.py", line 155, in _checkCode
raise NotImplementedError('No DISPATCH member for op %r' % op)
NotImplementedError: No DISPATCH member for op 28

[system path]/decimal.py:2173: Invalid arguments to (pow), got 4, expected 3
[system path]/decimal.py:2389: Invalid arguments to (rpow), got 3, expected 2
[system path]/decimal.py:2692: INTERNAL ERROR -- STOPPED PROCESSING FUNCTION --
Traceback (most recent call last):
File "/usr/lib64/python2.7/site-packages/pychecker/warn.py", line 242, in _checkFunction
_checkCode(code, codeSource)
File "/usr/lib64/python2.7/site-packages/pychecker/warn.py", line 155, in _checkCode
raise NotImplementedError('No DISPATCH member for op %r' % op)
NotImplementedError: No DISPATCH member for op 28

30 errors suppressed, use -#/--limit to increase the number of errors displayed

This happens with python-2.7 and pychecker-0.8.19.

#337 optparse.py:1668: (file) shadows builtin

Martin Mokrejs — Mon, 28 Dec 2015 17:27:45 -0000

Sorry, wrong URL: http://bugs.python.org/issue25964

optparse.py:1668: (file) shadows builtin

Martin Mokrejs — Mon, 28 Dec 2015 17:26:42 -0000

It seems pychecker is incorrect with its checks: please refer to http://bugs.python.org/issue25965

$ pychecker testcase.py
Processing module testcase (testcase.py)...

Warnings...

[system path]/optparse.py:1191: Function (init) has too many arguments (11)
[system path]/optparse.py:1400: Local variable (stop) not used
[system path]/optparse.py:1668: (file) shadows builtin
$ pychecker --version
0.8.19
$

Incorrect warning for function declared after use

Paul J. Lucas — Fri, 24 Oct 2014 20:14:21 -0000

Given:

def split_value( value, delim ):
    return [ i.strip() for i in value.split( delim ) ]

def format_user_info( name, roles ):
    return name + ";" + ':'.join( split_value( roles, ':' ) ) # <-- line 7

print format_user_info( "foo", ' a : b : c ' )

with pychecker 0.8.18, I get:

Processing module x (/tmp/x.py)...
foo;a:b:c

Warnings...

/tmp/x.py:7: Using the return value from (split_value) which is always None

If the functions are declared in the other order, there is no warning.

#335 string and string methods handling

Boris Egorov — Tue, 23 Sep 2014 05:55:30 -0000

Example for the second problem

string and string methods handling

Boris Egorov — Tue, 23 Sep 2014 05:54:38 -0000

pychecker --version
0.8.19

I tried to check ipython project with pychecker. It gives me " INTERNAL ERROR -- STOPPED PROCESSING FUNCTION --"

Some investigation shows that:

'str' type doesn't have 'format' method in pycheker internals. It was the problem which triggers error. I saw a list of builtin methods with ipython:

from pychecker import python
python.BUILTIN_METHODS.get(str)

See missing_format.py. Example output:

Processing module missing_format (missing_format.py)...

missing_format.py:3: INTERNAL ERROR -- STOPPED PROCESSING FUNCTION --
        Traceback (most recent call last):
          File "/usr/lib/python2.7/dist-packages/pychecker/warn.py", line 242, in _checkFunction
            _checkCode(code, codeSource)
          File "/usr/lib/python2.7/dist-packages/pychecker/warn.py", line 153, in _checkCode
            dispatch_func(oparg, operand, codeSource, code)
          File "/usr/lib/python2.7/dist-packages/pychecker/CodeChecks.py", line 1690, in _CALL_FUNCTION
            _handleFunctionCall(codeSource, code, oparg)
          File "/usr/lib/python2.7/dist-packages/pychecker/CodeChecks.py", line 474, in _handleFunctionCall
            check_arg_count)
          File "/usr/lib/python2.7/dist-packages/pychecker/CodeChecks.py", line 250, in _checkBuiltin
            _validateKwArgs(code, methodInfo, func_name[1], kwArgs)
          File "/usr/lib/python2.7/dist-packages/pychecker/CodeChecks.py", line 192, in _validateKwArgs
            if len(info) < 4:
        TypeError: object of type 'NoneType' has no len()

pychecker can't deduce type of string without a variable (string literal): the same problem don't appear if I use the same example with "string_contents" instead of variable 'src = "string_contents"'. I found a code in CodeChecks.py which determine a type of a variable, it looks like this:
```
objType = code.typeMap.get(utils.safestr(func_name[0]), [])
```

Pychecker probably need to distinguish variable from literals to handle such cases. Example for the second problem is in str_handling.py.

Found INTERNAL ERROR -- STOPPED PROCESSING FUNCTION --

Ben Kaehler — Thu, 04 Sep 2014 01:47:52 -0000

$ pychecker-2.7 --version
0.8.18
$ pychecker-2.7 for_pychecker.py
Processing module for_pychecker (for_pychecker.py)...
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pychecker/OP.py:101: RuntimeWarning: tp_compare didn't return -1 or -2 for exception
  if op in _HAS_NAME :

Warnings...

[system path]/site-packages/rpy2/robjects/robject.py:45: No global (WindowsError) found

[system path]/site-packages/rpy2/robjects/vectors.py:252: Local variable (res) not used
[system path]/site-packages/rpy2/robjects/vectors.py:298: __repr_content__ is not a special method
[system path]/site-packages/rpy2/robjects/vectors.py:301: INTERNAL ERROR -- STOPPED PROCESSING FUNCTION --
    Traceback (most recent call last):
      File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pychecker/warn.py", line 250, in _checkFunction
        _handleNestedCode(func_code, code, codeSource)
      File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pychecker/warn.py", line 188, in _handleNestedCode
        _checkCode(code, codeSource)
      File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pychecker/warn.py", line 149, in _checkCode
        op, oparg, operand = code.popNextOp()
      File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pychecker/CodeChecks.py", line 999, in popNextOp
        operand = OP.getOperand(op, self.func_code, oparg)
      File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pychecker/OP.py", line 101, in getOperand
        if op in _HAS_NAME :
    ValueError: NA values cannot be evaluated as booleans.

$ python -c 'import rpy2; print rpy2.__version__'
2.4.3