170      png_warning (p, "Potential overflow in png_zalloc()");  in png_zalloc()
353       png_warning(png_ptr,  in png_data_freer()
876       png_warning(png_ptr,  in png_check_cHRM_fixed()
889       png_warning(png_ptr,  in png_check_cHRM_fixed()
895       png_warning(png_ptr, "Invalid cHRM white point");  in png_check_cHRM_fixed()
900       png_warning(png_ptr, "Invalid cHRM red point");  in png_check_cHRM_fixed()
905       png_warning(png_ptr, "Invalid cHRM green point");  in png_check_cHRM_fixed()
910       png_warning(png_ptr, "Invalid cHRM blue point");  in png_check_cHRM_fixed()
919       png_warning(png_ptr,  in png_check_cHRM_fixed()
940       png_warning(png_ptr, "Image width is zero in IHDR");  in png_check_IHDR()
946       png_warning(png_ptr, "Image height is zero in IHDR");  in png_check_IHDR()
956       png_warning(png_ptr, "Image width exceeds user limit in IHDR");  in png_check_IHDR()
966       png_warning(png_ptr, "Image height exceeds user limit in IHDR");  in png_check_IHDR()
972       png_warning(png_ptr, "Invalid image width in IHDR");  in png_check_IHDR()
978       png_warning(png_ptr, "Invalid image height in IHDR");  in png_check_IHDR()
988       png_warning(png_ptr, "Width is too large for libpng to process pixels");  in png_check_IHDR()
994       png_warning(png_ptr, "Invalid bit depth in IHDR");  in png_check_IHDR()
1001       png_warning(png_ptr, "Invalid color type in IHDR");  in png_check_IHDR()
1010       png_warning(png_ptr, "Invalid color type/bit depth combination in IHDR");  in png_check_IHDR()
1016       png_warning(png_ptr, "Unknown interlace method in IHDR");  in png_check_IHDR()
1022       png_warning(png_ptr, "Unknown compression method in IHDR");  in png_check_IHDR()
1038       png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");  in png_check_IHDR()
1048          png_warning(png_ptr, "Unknown filter method in IHDR");  in png_check_IHDR()
1054          png_warning(png_ptr, "Invalid filter method in IHDR");  in png_check_IHDR()
1062       png_warning(png_ptr, "Unknown filter method in IHDR");  in png_check_IHDR()