mozilla/servo — pull request #2426 by bjwbell (2014-05-14 00:06:29+00:00)
Title: Add message to fonts.len() == 0 assert

If msttcorefonts isn't installed, output a more informative error message.

./servo ../src/test/html/about-mozilla.html prints
"task 'LayoutWorker' failed at 'No matching font(s), are the appropriate fonts installed?',
../servo/src/components/gfx/font_context.rs:195"
vs.
"task 'LayoutWorker' failed at 'assertion failed: fonts.len() > 0',
../servo/src/components/gfx/font_context.rs:195"