[MSVC2015/x86] Crash when rendering with cycles. #50176

New Issue

Ray molenkamp · 2016-12-03T22:17:25+01:00

Ray molenkamp commented

2016-12-03 22:17:25 +01:00

When rendering with cycles (any scene), blender crashes instantly (in release x86 builds only, debug is fine, x64 is fine)

a nullref in beckmann_table_rows seems to be the culprit, problem goes away if i turn int index_slope_x to volatile (feels like a codegen bug, but lack the time to properly investigate).

Bumped into it while running sanity checks on the lib updates from this week, but can replicate the crash with a daily from the buildbot (used blender-2.78-841f3e4-win32-vc14.zip but really doubt it matters much)

When rendering with cycles (any scene), blender crashes instantly (in release x86 builds only, debug is fine, x64 is fine) a nullref in beckmann_table_rows seems to be the culprit, problem goes away if i turn int index_slope_x to volatile (feels like a codegen bug, but lack the time to properly investigate). Bumped into it while running sanity checks on the lib updates from this week, but can replicate the crash with a daily from the buildbot (used blender-2.78-841f3e4-win32-vc14.zip but really doubt it matters much)

Ray molenkamp commented

2016-12-03 22:17:25 +01:00

Changed status to: 'Open'

Ray molenkamp commented

2016-12-03 22:17:26 +01:00

Added subscriber: @LazyDodo

Ray molenkamp commented

2016-12-03 22:17:46 +01:00

Added subscribers: @Sergey, @MartijnBerger

blessed nyatsine commented

2016-12-03 23:38:15 +01:00

Added subscriber: @BFTKO

blessed nyatsine commented

2016-12-03 23:39:05 +01:00

i would just loike the rendering to start not to take me off the software

blessed nyatsine commented

2016-12-03 23:42:54 +01:00

is their anyway i could prevent this from happening

Ray molenkamp commented

2016-12-04 01:00:08 +01:00

Use a different build. Just the experimental 2015 x86 build has this issue.

Bastien Montagne commented

2016-12-09 10:17:10 +01:00

Added subscriber: @mont29

Ray molenkamp was assigned by Bastien Montagne

2016-12-09 10:17:10 +01:00

Bastien Montagne commented

2016-12-09 10:17:10 +01:00

@LazyDodo assigning to you since you maintain MSVC2015 afaik? Feel free to merge or close if you consider this as known issue for now, though.

Maybe @Sergey will also want to have a lok here (if he is not yet aware of the issue)?

@LazyDodo assigning to you since you maintain MSVC2015 afaik? Feel free to merge or close if you consider this as known issue for now, though. Maybe @Sergey will also want to have a lok here (if he is not yet aware of the issue)?

Sergey Sharybin commented

2016-12-09 10:22:25 +01:00

Interesting. Are you talking about index_slope_x for loop over random number U1 ?

Interesting. Are you talking about `index_slope_x` for `loop over random number U1` ?

Ray molenkamp commented

2016-12-09 14:44:09 +01:00

https://git.blender.org/gitweb/gitweb.cgi/blender.git/blob/HEAD:/intern/cycles/render/shader.cpp#l75
^^ this guy

I have to admit, i have no idea why this solves the crash, nor have I confirmed the resulting table is identical to 'good' build.

https://git.blender.org/gitweb/gitweb.cgi/blender.git/blob/HEAD:/intern/cycles/render/shader.cpp#l75 ^^ this guy I have to admit, i have no idea why this solves the crash, nor have I confirmed the resulting table is identical to 'good' build.

Ray molenkamp commented

2016-12-17 20:27:24 +01:00

Update: With this fix and D2367 applied , x86/2015 passes all of our tests tests.

Update: With this fix and [D2367](https://archive.blender.org/developer/D2367) applied , x86/2015 passes all of our tests tests.

Ray molenkamp commented

2017-04-25 22:23:56 +02:00

Changed status from 'Open' to: 'Resolved'

Ray molenkamp closed this issue

2017-04-25 22:23:56 +02:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

[MSVC2015/x86] Crash when rendering with cycles. #50176