assert(origin != NULL && origin[0] != '\0');
assert(version != NULL && version[0] != '\0');
HASH_FIND_STR(pkg->deps, origin, d);
HASH_FIND_STR(pkg->deps, __DECONST(char *, origin), d);
if (d != NULL) {
pkg_get(pkg, PKG_NAME, &n1, PKG_VERSION, &v1);
pkg_emit_error("%s-%s: duplicate dependency listing: %s-%s, ignoring",