The png library uses setjmp/longjmp to throw exceptions when reading. If this is not set up, the png library calls abort(). This change handles the errors and throws a C++ exception instead. This issue was found by testing images from pngsuite at http://www.schaik.com/pngsuite/. These images are included and a unit test was added to test both images that should be successful and images that should throw an exception.
792 B
32x32px
792 B
32x32px
![](/sij/mapnik/raw/commit/98a145acd0f30a511426589077a893c97890d04b/tests/data/pngsuite/ct1n0g04.png)