Cannot convert mng/jng images

[andreas-eriksson]

ImageMagick version

7.1.2-2

Operating system

Windows

Operating system, version and so on

11

Description

A permission denied error occurs when trying to convert mng or jng images.

Steps to Reproduce

.\magick.exe "D:\Tmp\image.jng" "D:\Tmp\image.png"
.\magick.exe "D:\Tmp\image.mng" "D:\Tmp\image.png"

Error:
magick.exe: unable to open image 'C:/Users/USER~1/AppData/Local/Temp/magick-SvG2YZ3ZEy4WEiicPVt3L0RCjZJeo7nR': Permission denied @ error/blob.c/OpenBlob/3596.

Images

image.zip

[snibgo]

I confirm the problem with IM v7.1.2-2.

This worked fine in versions 7.1.1-20 and 7.1.1.38.

[dlemstra]

Thanks for reporting this. We recently made some changes to use more secure methods on Windows. It seems that it is no longer allowed to open the same file twice at the same time. I just pushed a patch that closes the file before opening it again. This issue will be resolved in the next release.

[andreas-eriksson]

I have verified that this works in 7.1.2-3. Thanks for the quick resolution.