Linear Gradient not working

[jabrware]

Please make sure you are testing with the latest release of html2canvas.
Old versions are not supported and issues reported for them will be closed.

Please follow the general troubleshooting steps first:

• You are using the latest version
• You are testing using the non-minified version of html2canvas and checked any potential issues reported in the console

Bug reports:

When using this css:

background-image: linear-gradient(rgba(0, 0, 0, 0.7) 0.1em, transparent 0.1em), linear-gradient(90deg, rgba(0, 0, 0, 0.7) 0.1em, transparent 0.1em);
background-size: 1em 1em;

Nothing is drawn on the image.

JS Fiddle

Specifications:

• html2canvas version tested with: 1.0.0-alpha.12
• Browser & version: all
• Operating system: windows 10