libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image how comes that "libpng" of RHEL7 brings back that problem not seen for many years? the log beloe is from httpd and so most like php with gd-library is the messenger http://stackoverflow.com/questions/12990602/libpng-warning-interlace-handling-should-be-turned-on-when-using-png-read-image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image
I will look at this bug.
thank you! it seems to come diect from libpng because any PHP oder httpd warning would have a date / time in the logs these appears practically the same way as someone is calling a binary/script with exec() which produces stdout/stderr messages which all land in apaches errorlog
I have looked at the libpng code and patch mentioned in upstream is included in libpng-1.5.13 version too. Do you have the same version? How can I reproduce the error? Any suitable example? I have browsed the libpng sources and the message is relevant only for this part of code.
libpng-1.5.13-5.el7.x86_64 sadly since it's missing any timestamps i have no way to ask anybody what he may did and on what website - pretty sure the context is Magento webshop if you can make a patch to include date/time in the message and provide me a binary RPM it should be easy to grep through the apache access logs which IP did what requests at the same time and find a reproducer
As I have mentioned above the message comes from pngread.c file. Upstream bug was already assigned http://sourceforge.net/p/libpng/bugs/165/ and it is already fixed in libpng-1.5.13-5 at least. Please update to the latest one and let us know If the problem is still persistent. I am closing the bug for now because I have not insufficient data. Any reproducer would be welcome, though.
WTF - we write 2019-11-08, PHP - simple imagecreatefrompng() from a with gd-library created image are you kidding me? who gives a fuck about "should be" when some library spits junk left and right? libpng-1.6.36-1.fc30.x86_64 libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image libpng warning: Interlace handling should be turned on when using png_read_image