Inkscape 0.92 freezes on importing clipart

[uwestoehr]

- start Inkscape 0.92.2 on Win 7
- now use the menu File -> Import Clip Art
- in the appearing dialog press the button "Search"

result: Inkscape freezes

- try to click on the Close button

result: Windows will automatically kill Inkscape after a while. This happens not always. Sometimes Inkscape awakes after a while before Windows would kill it.

[Patrick Storz (ede123)]

Not reproduced on Windows 7 with Inkscape 0.92.2 (5c3e80d, 2017-08-06).
The search is executed properly and available clip arts are listed.

I assume the search request to openclipart.org times out for some reason - can you figure out why this request can not complete on your machine (e.g. proxy settings / security software / whatever)?

Note that if the server is unreachable (i.e. no internet connection) Inkscape does not attempt a search and informs the user accordingly, so it has to be something less obvious.

[uwestoehr (uwestoehr)]

> Not reproduced on Windows 7 with Inkscape 0.92.2

Interestingly now it works here fine too. I haven't changed anything not even turned off the PC. So I guess the clipart server had problems. However, Inkscape should not become unresponsive when the server responds too slow or if there are similar connection problems to the server.

[Patrick Storz (ede123)]

I'm afraid the blocking behavior is a regression of
https://gitlab.com/inkscape/inkscape/commit/738e2fcae54ef8764d33d3a47bf7868641efdcfd

Actually the search request should be done asynchronously (and therefore should be non-blocking), however the existence check added is a synchronous request (and therefore potentially blocks the UI).

[Patrick Storz (ede123)]

Fixed in
  https://gitlab.com/inkscape/inkscape/commit/906deef80961e9949d3bec7ef1d2a8b1c1fc8f65

The operations should now be fully asynchronous, even on Windows.

[Patrick Storz (ede123)]

Backported to 0.92.x in
  https://gitlab.com/inkscape/inkscape/commit/450a8e08dd18336909e4f1f248ba5e48a097660d