[png-mng-implement] libpng fail with zlib 1.2.11.1

[Mika Lindqvist]

=====================================
libpng 1.6.29: ./test-suite.log
=====================================

# TOTAL: 32
# PASS: 31
# SKIP: 0
# XFAIL: 0
# FAIL: 1
# XPASS: 0
# ERROR: 0

.. contents:: :depth: 2

FAIL: tests/pngtest
===================


Testing libpng version 1.6.29
with zlib version 1.2.11.1-motley.zlib-ng

libpng version 1.6.29 - March 16, 2017
Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
Copyright (c) 1996-1997 Andreas Dilger
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
library (10629): libpng version 1.6.29 - March 16, 2017

pngtest (10629): libpng version 1.6.29 - March 16, 2017

Testing ./tests/badcrc.png:
Image width = 1, height = 1

Files ./tests/badcrc.png and pngout.png are different
Was ./tests/badcrc.png written with the same maximum IDAT chunk size
(8192 bytes),
filtering heuristic (libpng default), compression level (zlib default),
and zlib version (1.2.11.1-motley.zlib-ng)?


PASS (1 zero samples)

Testing ./tests/badcrc.png:
Pass 0: rw
Image width = 1, height = 1

Files ./tests/badcrc.png and pngout.png are different

PASS (1 zero samples)

Testing ./tests/badcrc.png:rw
Image width = 1, height = 1

Files ./tests/badcrc.png and pngout.png are different

PASS (1 zero samples)
libpng passes test
Default limits:
width_max = 1000000
height_max = 1000000
cache_max = 1000
malloc_max = 8000000
libpng error: IDAT: incorrect data check

Testing libpng version 1.6.29
with zlib version 1.2.11.1-motley.zlib-ng

libpng version 1.6.29 - March 16, 2017
Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
Copyright (c) 1996-1997 Andreas Dilger
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
library (10629): libpng version 1.6.29 - March 16, 2017

pngtest (10629): libpng version 1.6.29 - March 16, 2017

Testing ./tests/badadler.png:./tests/badadler.png: libpng warning:
IDAT: incorrect data check
./tests/badadler.png -> libpng error: IDAT: incorrect data check
libpng error: IDAT: incorrect data check
pngout.png: libpng read error
FAIL

Testing ./tests/badadler.png:./tests/badadler.png: libpng warning:
IDAT: incorrect data check
./tests/badadler.png -> pngout.png: libpng read error
FAIL

Testing ./tests/badadler.png:./tests/badadler.png: libpng warning:
IDAT: incorrect data check
./tests/badadler.png -> pngout.png: libpng read error
FAIL
libpng FAILS test
Default limits:
width_max = 1000000
height_max = 1000000
cache_max = 1000
malloc_max = 8000000

Testing libpng version 1.6.29
with zlib version 1.2.11.1-motley.zlib-ng

libpng version 1.6.29 - March 16, 2017
Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
Copyright (c) 1996-1997 Andreas Dilger
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
library (10629): libpng version 1.6.29 - March 16, 2017

pngtest (10629): libpng version 1.6.29 - March 16, 2017

Testing ./pngtest.png:
Text compression[0]=-1

stereo mode = 1
vpAg = 100 x 100, units = 0

Text compression[0]=0

Image width = 91, height = 69

Files ./pngtest.png and pngout.png are different
Was ./pngtest.png written with the same maximum IDAT chunk size (8192
bytes),
filtering heuristic (libpng default), compression level (zlib default),
and zlib version (1.2.11.1-motley.zlib-ng)?

FAIL

Testing ./pngtest.png:
Text compression[0]=-1

stereo mode = 1
vpAg = 100 x 100, units = 0

Pass 0: rwrwrwrwrwrwrwrwrw
Pass 1: rwrwrwrwrwrwrwrwrw
Pass 2: rwrwrwrwrwrwrwrw
Pass 3: rwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrw
Pass 4: rwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrw
Pass 5: rwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrw
rwrwrwrw
Pass 6: rwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrw
rwrwrwrwrw
Text compression[0]=0

Image width = 91, height = 69

Files ./pngtest.png and pngout.png are different
FAIL

Testing ./pngtest.png:
Text compression[0]=-1

stereo mode = 1
vpAg = 100 x 100, units = 0

Pass 0: rwrwrwrwrwrwrwrwrw
Pass 1: rwrwrwrwrwrwrwrwrw
Pass 2: rwrwrwrwrwrwrwrw
Pass 3: rwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrw
Pass 4: rwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrw
Pass 5: rwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrw
rwrwrwrw
Pass 6: rwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrwrw
rwrwrwrwrw
Text compression[0]=0

Image width = 91, height = 69

Files ./pngtest.png and pngout.png are different
FAIL
libpng FAILS test
Default limits:
width_max = 1000000
height_max = 1000000
cache_max = 1000
malloc_max = 8000000
FAIL tests/pngtest (exit status: 1)

./pngfix pngtest.png ; ./pngfix pngout.png
IDAT OK default 15 15 8119 25247 pngtest.png
zTXt OK default 8 8 185 246 pngtest.png
IDAT OK default 15 15 8099 25247 pngout.png
zTXt OK default 8 8 185 246 pngout.png

[Glenn Randers-Pehrson]

There's nothing helpful in the zlib ChangeLog:

--------cut-----------------------------------
ChangeLog file for zlib

Changes in 1.2.11.1 (xx Jan 2017)
-
--------cut------------------------------------

I'll investigate further as time permits.

Glenn

Post by Mika Lindqvist
Image width = 91, height = 69
Files ./pngtest.png and pngout.png are different
FAIL