OK, I'll backport it. On Jan 4, 2008 4:49 AM, Thomas Wouters <twouters at google.com> wrote: > > > > On Jan 4, 2008 2:46 AM, Guido van Rossum <guido at python.org> wrote: > > See http://bugs.python.org/issue1731. Should we consider it safe to > > backport r57216 to 2.5.2? This is Thomas Wouters's code to disable > > spurious tracebacks when daemon threads die. We're running some 2.4 > > apps with (a variant of) this at Google that get many 1000s of > > invocations a day, so I'm pretty confident that it works. > > > > I'm also pretty confident it works, although it isn't really guaranteed to > catch *all* such situations. No reason not to backport it, just a remark > about how it checks to see if Python is shutting down. It is, however, > incredibly unlikely '_sys' won't be gone when we check for it if the > exception is indeed a spurious one. What could happen is that a legitimate > exception happens right before interpreter shutdown, then a thread switch > occurs before Python tries to report the exception, the interpreter exits, > and then the daemonic thread starts to report its exception. The only way to > catch that is to do the 'are we exiting' check in the C code that does the > actual thread-exception reporting. I'm not sure if it's worth it, as the > timing has to be pretty exact for that to happen, and you wouldn't want to > introduce a bug there; could be years before someone figures it out :P > > -- > Thomas Wouters <twouters at google.com> > > Hi! I'm a .signature virus! copy me into your .signature file to help me > spread! -- --Guido van Rossum (home page: http://www.python.org/~guido/)
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