LIBPNG_BUG        645 contrib/libtests/pngimage.c          case LIBPNG_BUG:     lp = "bug(libpng)"; break;
LIBPNG_BUG        856 contrib/libtests/pngimage.c       display_log(dp, LIBPNG_BUG, "png_get_rowbytes returned 0");
LIBPNG_BUG        860 contrib/libtests/pngimage.c       display_log(dp, LIBPNG_BUG, "png_read_png did not set IDAT flag");
LIBPNG_BUG        864 contrib/libtests/pngimage.c       display_log(dp, LIBPNG_BUG, "png_read_png did not create row buffers");
LIBPNG_BUG        869 contrib/libtests/pngimage.c       display_log(dp, LIBPNG_BUG, "png_get_IHDR failed");
LIBPNG_BUG        985 contrib/libtests/pngimage.c          display_log(dp, LIBPNG_BUG, "png_get_rows returned NULL");
LIBPNG_BUG       1073 contrib/libtests/pngimage.c                   display_log(dp, LIBPNG_BUG,
LIBPNG_BUG       1128 contrib/libtests/pngimage.c                display_log(dp, LIBPNG_BUG, "invalid bit depth %d", bit_depth);