From: [EMAIL PROTECTED] Operating system: Linux 2.4.18 PHP version: 4.2.3 PHP Bug Type: GD related Bug description: libpng 1.2.5; segfault while loading png image
After recompiling php 4.2.3 with the gd image functions, I've found that libpng 1.2.5 is not compatible with php 4.2.3. While loading a png file using ImageCreateFromPNG($img); where $img is the filename, php would segfault. After recompiling php multiple times, i've still had the same problem. I gave the stable version of php in the development stage a try, and still recieved a segfault. So then i used the strace function at the command line along with the php cli to figure out that it would segfault when the png image was loaded. When i viewed the libpng website, i found the following... "The current public release, libpng 1.2.5, has a new API (since 1.0.x) for dynamically enabling and disabling certain optimizations (currently limited to MMX code--which is compiled into GNU C versions only if PNG_THREAD_UNSAFE_OK is defined, due to the gcc code's use of static global variables to work around addressing limitations). As a consequence of this and some other changes, its DLL and shared-library (.so) numbers were bumped from 2 to 3." After reading this, i've decided to downgrade to libpng1.0.15 and recompiled php. After doing this, the segfault would not appear again. Hopes this helps... -- Edit bug report at http://bugs.php.net/?id=21005&edit=1 -- Try a CVS snapshot: http://bugs.php.net/fix.php?id=21005&r=trysnapshot Fixed in CVS: http://bugs.php.net/fix.php?id=21005&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=21005&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=21005&r=needtrace Try newer version: http://bugs.php.net/fix.php?id=21005&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=21005&r=support Expected behavior: http://bugs.php.net/fix.php?id=21005&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=21005&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=21005&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=21005&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=21005&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=21005&r=dst IIS Stability: http://bugs.php.net/fix.php?id=21005&r=isapi
