#1698 Handle unindentifiable images without erroring
I don't have an example to duplicate it, but you could try interlaced and non-interlaced PNGs, or just fake it.
Module allura.model.filesystem:149 in save_image << return None, None image = Image.open(fp) format = image.format if save_original: >> image = Image.open(fp) Module Image:1980 in open << pass raise IOError("cannot identify image file") # >> raise IOError("cannot identify image file") IOError: cannot identify image file
Fixing with [#4726]