in src/openslideUtil.cpp [40:51]
void OpenSlidePtr::_open(const char *filename) {
osr_ = openslide_open(filename);
if (osr_ == nullptr) {
// Openslide did not intialize
throw 1;
}
if (openslide_get_error(osr_)) {
BOOST_LOG_TRIVIAL(error) << openslide_get_error(osr_);
openslide_close(osr_);
throw 1;
}
}