SolveSpace version: from git, 5d78f99

Operating system: Debian Buster

Expected behavior

Showing some text rendered with Terminus or display an error because of failure.

Actual behavior

Crash. Here is the log:

Generate::ALL took 184 ms
Missing (absent) translation for 'click to place bottom right of text'
Generate::DIRTY took 40 ms
Generate::DIRTY took 40 ms
freetype: cannot set character size: invalid pixel size
File /home/foobar/contrib/solvespace/src/solvespace/src/ttf.cpp, line 404, function AspectRatio:
Assertion failed: fontFace != NULL.
Message: Expected font face to be loaded.
zsh: abort      solvespace

The message about "cannot set character size" is thrown by ttf.cpp:234, content of sizeRequest is:
{type = FT_SIZE_REQUEST_TYPE_REAL_DIM, width = 65536, height = 65536, horiResolution = 128, vertResolution = 128}

Error value is not used or sent to caller on ttf.cpp:102, should be checked and probably return NULL. With other things, I guess.