Subject: bug#28626: 25.3; problem displaying images

From: Glenn Morris <[email-masked]>
Date: Wed, 27 Sep 2017 17:33:34 -0400

[email-masked] wrote:

> All of the sudden (probably after latest updates) when I C-x f any image
> to display in the buffer it does not appear!
[...]
> ImageMagick error: no decode delegate for this image format `PNG' @ error/constitute.c/ReadImage/504 [2 times]

Looks like a problem with your ImageMagick installation.
Check DELEGATES line in

  convert -list configure

and check libpng installation too, I guess.