QGIS hangs on WMS layer without network

[qgib]

Author Name: marisn - (marisn -)
Original Redmine Issue: 3419
Affected QGIS version: master
Redmine category:web_services_clients/wms
Assignee: Jürgen Fischer

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Steps to reproduce:

• Add a WMS layer;
• Disconnect network;
• Zoom/Pan map canvas.

QGIS get's stuck. It's impossible to cancel redraw - only kill QGIS.

QGIS r15051M Qt 4.7.1

strace is spilling nonstop:

poll([{fd=3, events=POLLIN}, {fd=8, events=POLLIN}, {fd=9, events=POLLIN}, {fd=7, events=POLLIN}, {fd=10, events=POLLIN}], 5, 0) = 0 (Timeout)
read(7, 0x1a06374, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
read(7, 0x1a06374, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=3, events=POLLIN}, {fd=8, events=POLLIN}, {fd=9, events=POLLIN}, {fd=7, events=POLLIN}, {fd=10, events=POLLIN}], 5, 0) = 0 (Timeout)
read(7, 0x1a06374, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
read(7, 0x1a06374, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=3, events=POLLIN}, {fd=8, events=POLLIN}, {fd=9, events=POLLIN}, {fd=7, events=POLLIN}, {fd=10, events=POLLIN}], 5, 0) = 0 (Timeout)
read(7, 0x1a06374, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
read(7, 0x1a06374, 4096)                = -1 EAGAIN (Resource temporarily unavailable)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• fixed_version_id was changed from Version 1.7.0 to Version 1.7.4

[qgib]

Author Name: Paolo Cavallini (@pcav)

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• crashes_corrupts_data was configured as 0
• version was configured as master
• fixed_version_id was changed from Version 1.7.4 to Version 1.8.0

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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fixed in bb623a8

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• resolution was configured as fixed
• status_id was changed from Open to Closed
• pull_request_patch_supplied was configured as 0