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.
299 B
32x32px
299 B
32x32px
![](/sij/mapnik/raw/commit/8b97c8a7d1680f36f113b99adff89ec04b12fa2f/tests/data/pngsuite/basi0g16.png)