Closed
Description
Bug report
Bug summary
When cross-compiling matplotlib and dependencies (numpy, six, pytz, etc) for OpenWRT in Ubuntu 16.04LTS, all code properly compiles. However, when testing matplotlib on the target, when importing matplotlib.pyplot I get the failure "terminate called after throwing an instance of 'char const*'". Specifically, after a font is imported in font_manager, the failure comes up when attempting to add a second font (regardless of the first font). I've attempted multiple versions of Python3 (3.6.2, 3.6.0, 3.5.4), as well as numerous combinations of dependent packages. Not that I am only compiling freetype as a library for the shared object "libfreetype.so.6*", as well as the ft2font header file, instead of the full freetype package.
Code for reproduction
import matplotlib
print(matplotlib.__version__)
import matplotlib.pyplot as plt
print("Success!")Actual outcome
root@LEDE:~# python3 test.py --verbose-debug
$HOME=/root
matplotlib data path /usr/lib/python3.6/site-packages/matplotlib/mpl-data
*****************************************************************
You have the following UNSUPPORTED LaTeX preamble customizations:
Please do not ask for support with these customizations active.
*****************************************************************
loaded rc file /usr/lib/python3.6/site-packages/matplotlib/mpl-data/matplotlibrc
matplotlib version 2.0.2
verbose.level debug
interactive is False
platform is linux
loaded modules: <dict_keyiterator object at 0x17ebb00>
CACHEDIR=/root/.cache/matplotlib
font search path ['/usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf', '/usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/afm', '/usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/pdfcorefonts']
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/cmb10.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/cmr10.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXSizOneSymReg.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXSizThreeSymBol.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSansMono.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSansMono-Oblique.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSerif-Bold.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXGeneral.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSerifDisplay.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXNonUniBolIta.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/cmex10.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/cmmi10.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/cmss10.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXSizTwoSymBol.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/cmsy10.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/cmtt10.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXNonUni.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSans-BoldOblique.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXGeneralItalic.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXGeneralBolIta.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSans-Bold.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSans.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXSizFiveSymReg.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSans-Oblique.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXGeneralBol.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXSizThreeSymReg.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSerif.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXSizFourSymBol.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXSizFourSymReg.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXNonUniBol.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXNonUniIta.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSerif-BoldItalic.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSansDisplay.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSansMono-Bold.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXSizTwoSymReg.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STIXSizOneSymBol.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSansMono-BoldOblique.ttf
trying fontname /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSerif-Italic.ttf
createFontDict: /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/cmb10.ttf
createFontDict: /usr/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/cmr10.ttf
terminate called after throwing an instance of 'char const*'
Aborted
Expected outcome
root@LEDE:~# python3 test.py
2.0.2
Success!
Matplotlib version
- Operating System: OpenWRT / LEDE V17.01.02
- Matplotlib Version: 2.0.2
- Python Version: 3.6.2
- Other Libraries:
- numpy: 1.12.1
- six: 1.10.0
- dateutil: 2.6.1
- pytz: 2017.2
- cycler: 0.10.0
- pyparsing: 2.2.0
- libfreetype: 2.5.5
- libpng: 1.2.57
BUILDING MATPLOTLIB
matplotlib: yes [2.0.2]
python: yes [3.6.2 (default, Jun 8 2017, 21:02:37) [GCC
5.4.0 20160609]]
platform: yes [linux]
REQUIRED DEPENDENCIES AND EXTENSIONS
numpy: yes [version 1.12.1]
six: yes [using six version 1.10.0]
dateutil: yes [using dateutil version 2.6.1]
functools32: yes [Not required]
subprocess32: yes [Not required]
pytz: yes [using pytz version 2017.2]
cycler: yes [using cycler version 0.10.0]
tornado: yes [tornado was not found. It is required for the
WebAgg backend. pip/easy_install may attempt to
install it after matplotlib.]
pyparsing: yes [using pyparsing version 2.2.0]
libagg: yes [pkg-config information for 'libagg' could not
be found. Using local copy.]
freetype: yes [version 2.5.5]
png: yes [version 1.2.57]
qhull: yes [pkg-config information for 'qhull' could not be
found. Using local copy.]