[New-bugs-announce] [issue9062] urllib.urlopen crashes when launched from a thread

Olivier Berten report at bugs.python.org
Wed Jun 23 18:15:00 CEST 2010

New submission from Olivier Berten <olivier.berten at gmail.com>:

I'm writing SwatchBooker <https://launchpad.net/swatchbooker>, an app that's (among other things) reading some data from the web. When urllib.urlopen is called first from within a secondary thread, the app crashes (or freezes). If it's been called first from the main thread, there's no problem.

You can reproduce that by downloading http://launchpad.net/swatchbooker/trunk/0.7/+download/SwatchBooker-0.7.noinstall.zip

1. Launch swatchbooker.pyw
2. Open from web
3. Select ICI Dulux, Pantone or RAL
4. Cancel
5. Close the program
6. Relaunch swatchbooker.pyw
7. Open from web
8. Choose any swatch from ICI Dulux, Pantone or RAL (Don't click ColorCharts.org or Digital Colour Atlas!)
9. OK
10. Crash

For ColorCharts.org and Digital Colour Atlas, the list itself is loaded through urllib.urlopen from the main thread so it makes the rest go smoothly...

components: None
messages: 108458
nosy: olivier-berten
priority: normal
severity: normal
status: open
title: urllib.urlopen crashes when launched from a thread
versions: Python 2.6

Python tracker <report at bugs.python.org>

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