Hi,
Please post this on the issue tracker. http://bugs.python.org
On Fri, Dec 5, 2008 at 4:42 AM,
Hello,
This concerns a known bug in the frame_setlineno() function for Python 2.5.x and 2.6.x (maybe in earlier version too). It is not possible to use this function when the address or line offset are greater than 127. The problem comes from the lnotab variable which is typed char*, therefore implicitely signed char*. Any value above 127 becomes a negative number.
The fix is very simple (applied on the Python 2.6.1 version of the source code):
--- frameobject.c Thu Oct 02 19:39:50 2008 +++ frameobject_fixed.c Fri Dec 05 11:27:42 2008 @@ -119,8 +119,8 @@ line = f->f_code->co_firstlineno; new_lasti = -1; for (offset = 0; offset < lnotab_len; offset += 2) { - addr += lnotab[offset]; - line += lnotab[offset+1]; + addr += ((unsigned char*)lnotab)[offset]; + line += ((unsigned char*)lnotab)[offset+1]; if (line >= new_lineno) { new_lasti = addr; new_lineno = line;
-- Cheers, Benjamin Peterson "There's nothing quite as beautiful as an oboe... except a chicken stuck in a vacuum cleaner."