can not render out symbol layer's icon image

[tianbaolin]

hello:
now I came across a problem,when I change a style, the symbol layer cann not render out it's icon image.
the icon image area show a black rectangle,but sometimes it render correct. I use the v0.37.

[jfirebaugh]

Thanks for the report! This will be fixed by #4876. Let's track it in that issue.