Can't Compile

[stoplion]

Hello,
FontCustom won't compile. CPU spikes to 100% and CLI hangs and never completes. It actually creates the font files but they are 0kb.

fontcustom -v
//fontcustom-1.3.0
fontforge --version
//fontforge 20120731
//libfontforge 20120731

# --------------------------------------------------------------------------- #
# Project Info
#   Defaults shown. Learn more about these options by running
#   `fontcustom help` or visiting <http://fontcustom.com>.
# --------------------------------------------------------------------------- #

font_name: fontcustom
css_selector: .icon-{{glyph}}
preprocessor_path: ""
autowidth: false
no_hash: false
force: false
debug: false
quiet: false


# --------------------------------------------------------------------------- #
# Input Paths
# --------------------------------------------------------------------------- #

input:
  vectors: ./SVG         # required
  # templates: ./templates


# --------------------------------------------------------------------------- #
# Output Paths
# --------------------------------------------------------------------------- #

output:
  fonts: ./Fonts
  css: ./stylesheets
  preview: ./styleguide
  #my-custom-template.yml: path/to/template/output


# --------------------------------------------------------------------------- #
# Templates
#   Included in Font Custom: preview, css, scss, scss-rails
#   Custom templates should be saved in the INPUT[:templates] directory and
#   referenced by their baserame.
# --------------------------------------------------------------------------- #

# templates:
#  - scss
#  - preview
 #- my-custom-template.yml

[kaizau]

Do you mind upgrading to the latest version and trying again with fontcustom watch --debug?