r.buffer crashes when trying to buffer rasterized polygons

[dido]

At crash time r.buffer outputs this:

Reading input raster map <defekti_rast@PERMANENT>...

100%

Finding buffer zones...

57%

crash here

Here is the windows crash log:

Problem signature:

Problem Event Name: APPCRASH Application Name: r.buffer.EXE Application Version: 7.4.0.0 Application Timestamp: 5a6bcca6 Fault Module Name: r.buffer.EXE Fault Module Version: 7.4.0.0 Fault Module Timestamp: 5a6bcca6 Exception Code: c0000005 Exception Offset: 000000000000164c OS Version: 6.1.7601.2.1.0.256.48 Locale ID: 1026 Additional Information 1: bbf7 Additional Information 2: bbf7706b53fbb0fa7695ff337b93e0f9 Additional Information 3: 9d52 Additional Information 4: 9d5215a4a4810f4d9a53d895d6bdf7b3

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Problem is manifested using a python script. Script and data provided as attachment.

!!! The script must be tweaked slightly in the beginning to match the grass install path. A proper GRASS DB must be provided there with a BG_DEM location and a PERMANENT mapset projected in EPSG:32635 (UTM Z35N)

[dido]

Cannot attach a too-big file, please download it here: ​http://dido.bajhui.org/pics_aquarium/dem_blending_test.zip

[mmetz]

In 73111:

r.buffer: fix interger overflow (fixes #3620)

[mmetz]

In 73112:

r.buffer: fix interger overflow (fixes #3620, backport trunk r73111)