Bugs item #1598083, was opened at 2006-11-16 18:50
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Category: Python Interpreter Core
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Jp Calderone (kuran)
Assigned to: Nobody/Anonymous (nobody)
Summary: Top-level exception handler writes to stdout unsafely

Initial Comment:
When an exception reaches the top frame and is displayed by the exception 
handler, they are handled by formatting them to stderr.  This involves a series 
of calls to PyFile_WriteString, either directly from PyErr_Display or 
indirectly through PyTraceBack_Print.  Few, if any, of these PyFile_WriteString 
calls have their result checked for error.  Worse, PyFile_WriteString itself 
does not check the return value of fputs().

So, for example, with a signal handler installed, a signal received while a 
traceback is being printed can result in the traceback _not_ being printed.


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