Part of https://github.com/freebsd/freebsd-ports/commit/8cf728289caf3a06b225866707277d5ff170dff0

Index: source/build/include/libdivide.h
--- source/build/include/libdivide.h.orig
+++ source/build/include/libdivide.h
@@ -2026,8 +2026,8 @@ class divider { (public)
     }
 
     bool operator==(const divider<T, ALGO>& other) const {
-        return div.denom.magic == other.denom.magic &&
-               div.denom.more == other.denom.more;
+        return div.denom.magic == other.div.denom.magic &&
+               div.denom.more == other.div.denom.more;
     }
 
     bool operator!=(const divider<T, ALGO>& other) const {
