Thumbor 6.7.3 breaks on Debian 10 and Ubuntu 18.04

Behaviour

After running pip install thumbor and starting Thumbor 6.7.3, there are a lot of warnings about filters that can’t be used:

root@static:~# thumbor
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.brightness could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_brightness.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.colorize could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_colorize.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.contrast could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_contrast.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.rgb could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_rgb.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.round_corner could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_round_corner.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.noise could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_noise.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.watermark could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_alpha.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.equalize could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_equalize.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.fill could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_fill.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.sharpen could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_sharpen.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.frame could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_nine_patch.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.convolution could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_convolution.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.blur could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_convolution.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.saturation could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_saturation.so)
2020-03-06 18:07:57 thumbor:WARNING Module thumbor.filters.curve could not be imported: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /usr/local/lib/python2.7/dist-packages/thumbor/ext/filters/_curve.so)
2020-03-06 18:07:57 thumbor:WARNING Error importing bounding_box filter, trimming won't work

When doing pip install thumbor==6.7.2 on exactly the same system the warnings go away.

root@static:~# thumbor
2020-03-06 18:07:10 thumbor:WARNING Error importing bounding_box filter, trimming won't work

Operating system

Debian 10 and Ubuntu 18.04

[heynemann]

I think I found the culprit. Can you please try with: pip install https://github.com/thumbor/thumbor/archive/fixes/6.7.x.zip

[yjwong]

Ran into the last warning; thumbor:WARNING Error importing bounding_box filter, trimming won't work. Upon closer look, it seems like there’s a relocation error related to color_distance (this is in Alpine Linux):

/thumbor-6.7.5 # ldd /usr/lib/python2.7/site-packages/thumbor-6.7.5-py2.7-linux-x86_64.egg/thumbor/ext/filters/_bounding_box.so 
	/lib/ld-musl-x86_64.so.1 (0x7f1373895000)
	libpython2.7.so.1.0 => /usr/lib/libpython2.7.so.1.0 (0x7f13736ea000)
	libc.musl-x86_64.so.1 => /lib/ld-musl-x86_64.so.1 (0x7f1373895000)
Error relocating /usr/lib/python2.7/site-packages/thumbor-6.7.5-py2.7-linux-x86_64.egg/thumbor/ext/filters/_bounding_box.so: color_distance: symbol not found

I’m not terribly proficient with C at this point, but removing the inline specifier in thumbor/ext/filters/_bounding_box.c solves the problem (probably at the expense of performance?).