[ python-Bugs-852281 ] test_winreg failing, Win98SE

[SourceForge.net]

Bugs item #852281, was opened at 2003-12-01 15:01
Message generated for change (Comment added) made by tim_one
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=852281&group_id=5470

Category: Windows
Group: Python 2.4
Status: Open
Resolution: None
Priority: 7
Submitted By: Tim Peters (tim_one)
Assigned to: Guido van Rossum (gvanrossum)
Summary: test_winreg failing, Win98SE

Initial Comment:
Under current CVS, on Win98SE:

C:\Code\python\PCbuild>python ../lib/test/test_winreg.p
y
Traceback (most recent call last):
  File "../lib/test/test_winreg.py", line 135, in ?
    TestAll(HKEY_CURRENT_USER)
  File "../lib/test/test_winreg.py", line 130, in TestAll
    WriteTestData(root_key)
  File "../lib/test/test_winreg.py", line 37, in 
WriteTestData
    SetValueEx(sub_key, value_name, 0, value_type, 
value_data)
WindowsError: [Errno 87] The parameter is incorrect

C:\Code\python\PCbuild>

That's all I know now.

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

>Comment By: Tim Peters (tim_one)
Date: 2003-12-01 19:34

Message:
Logged In: YES 
user_id=31435

Anthony, yes, it is.

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

Comment By: Anthony Baxter (anthonybaxter)
Date: 2003-12-01 19:23

Message:
Logged In: YES 
user_id=29957

Argh. Is this busted on the 2.3 branch as well?


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

Comment By: Tim Peters (tim_one)
Date: 2003-12-01 15:28

Message:
Logged In: YES 
user_id=31435

Yes, when I reduced the size of Big String to 12, it stopped 
failing there and failed on Big Binary instead.  The docs don't 
promise that anything larger than 2048 will work ...

"x"*(2**14-1) works, "x"*2**14 does not, for Big String.

"x"*2**14 works, "x"*(2**14+1) does not, for Big Binary.

So 2**14 bytes is the max on my Win98SE, when counting 
the trailing zero byte in REG_SZ.

The limits are not documented (apart from the docs saying 
you shouldn't use any value exceeding 2**11 bytes).

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

Comment By: Guido van Rossum (gvanrossum)
Date: 2003-12-01 15:14

Message:
Logged In: YES 
user_id=6380

I bet the Big String and/or Big Binary test values that I
added to the test_data table are too long for Win98. I can
only test this on Win98. Can you experiment and find out
what the largest value is that works on Win98? (The
alternative would be to write code that somehow tries to
*detect* the longest string that works, using bisection. I
don't know if these limits are documented somewhere.)

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

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=852281&group_id=5470