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Maniphest T46403

Motion tracking on Blender 2.76 rc3 on mac osx
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Description

System Information
Mac OsX 10.10.5

Blender Version
fb78f6d
2.76 rc3

Short description of error
Motion tracking don't work.
"Detect Features" works but when I click play in "Track" nothing happens.
It works perfectly on 2.75 (c27589e)

Best regards

Revisions and Commits

rB Blender
rB64e4f9967fbc Fix T46403: motion tracking not workig with Xcode 7 on OS X.

Related Objects

Event Timeline

Sillon (robsil47) created this task.Oct 7 2015, 9:35 AM
Sillon (robsil47) raised the priority of this task from to 90.
Sillon (robsil47) updated the task description. (Show Details)
Sillon (robsil47) added a project: BF Blender.
Sillon (robsil47) edited a custom field.
Sillon (robsil47) added a subscriber: Sillon (robsil47).
Campbell Barton (campbellbarton) assigned this task to Sergey Sharybin (sergey).Oct 7 2015, 11:00 AM
Campbell Barton (campbellbarton) added a subscriber: Campbell Barton (campbellbarton).
Bastien Montagne (mont29) lowered the priority of this task from 90 to 30.Oct 8 2015, 10:21 AM
Bastien Montagne (mont29) added a subscriber: Bastien Montagne (mont29).

As usual, please attach here needed files to help reproducing the issue (here would be .blend + video file I guess)…

Sillon (robsil47) added a comment.Oct 8 2015, 12:07 PM

Hello, I hope it'll help.

MTrack_test.blend475 KBDownload

Bastien Montagne (mont29) raised the priority of this task from 30 to Normal.Oct 8 2015, 1:13 PM

thanks for the files. Cannot confirm that here on linux with latest master, tracks works as expected afaikt…

Brecht Van Lommel (brecht) added a subscriber: Brecht Van Lommel (brecht).Oct 10 2015, 1:07 AM

I can confirm the issue on OS X with 2.76 RC3 and my own build using Xcode 7 and the 10.11 SDK. The build with the older SDK / compiler at T46341#339613 works though, so I think for the 2.76 release this should work, but there's definitely something broken here.

In my own builds it works fine in debug mode, but not release mode. It sometimes crashes even, but there's no consistent backtrace, looks like some random memory corruption.

Brecht Van Lommel (brecht) changed the task status from Unknown Status to Resolved by committing rB64e4f9967fbc: Fix T46403: motion tracking not workig with Xcode 7 on OS X..Oct 10 2015, 4:21 AM
Brecht Van Lommel (brecht) added a commit: rB64e4f9967fbc: Fix T46403: motion tracking not workig with Xcode 7 on OS X..
Brecht Van Lommel (brecht) added a comment.Oct 10 2015, 4:24 AM

Fixed now, thanks for the report.

It seems the new clang version compiles this code in such a way that FloatImage temp_image is on exactly the same stack location on the second call to GetImageForMarker(), without getting overwritten by something else, so the uninitialized shape_ in the second call has the exact same value as the one from the first call.

Sillon (robsil47) added a comment.Oct 15 2015, 3:59 PM

Hello, I tried today 2.76 and the bug is fixed.
Congratulations.
Thank you