diff --git a/go/types/objectpath/objectpath.go b/go/types/objectpath/objectpath.go
index 7e96fc2..557202b 100644
--- a/go/types/objectpath/objectpath.go
+++ b/go/types/objectpath/objectpath.go
@@ -254,18 +254,18 @@
 
 		if tname.IsAlias() {
 			// type alias
-			if r := find(obj, T, path); r != nil {
+			if r := find(obj, T, path, nil); r != nil {
 				return Path(r), nil
 			}
 		} else {
 			if named, _ := T.(*types.Named); named != nil {
-				if r := findTypeParam(obj, typeparams.ForNamed(named), path); r != nil {
+				if r := findTypeParam(obj, typeparams.ForNamed(named), path, nil); r != nil {
 					// generic named type
 					return Path(r), nil
 				}
 			}
 			// defined (named) type
-			if r := find(obj, T.Underlying(), append(path, opUnderlying)); r != nil {
+			if r := find(obj, T.Underlying(), append(path, opUnderlying), nil); r != nil {
 				return Path(r), nil
 			}
 		}
@@ -279,7 +279,7 @@
 		if _, ok := o.(*types.TypeName); !ok {
 			if o.Exported() {
 				// exported non-type (const, var, func)
-				if r := find(obj, o.Type(), append(path, opType)); r != nil {
+				if r := find(obj, o.Type(), append(path, opType), nil); r != nil {
 					return Path(r), nil
 				}
 			}
@@ -299,7 +299,7 @@
 				if m == obj {
 					return Path(path2), nil // found declared method
 				}
-				if r := find(obj, m.Type(), append(path2, opType)); r != nil {
+				if r := find(obj, m.Type(), append(path2, opType), nil); r != nil {
 					return Path(r), nil
 				}
 			}
@@ -316,41 +316,44 @@
 }
 
 // find finds obj within type T, returning the path to it, or nil if not found.
-func find(obj types.Object, T types.Type, path []byte) []byte {
+//
+// The seen map is used to short circuit cycles through type parameters. If
+// nil, it will be allocated as necessary.
+func find(obj types.Object, T types.Type, path []byte, seen map[*types.TypeName]bool) []byte {
 	switch T := T.(type) {
 	case *types.Basic, *types.Named:
 		// Named types belonging to pkg were handled already,
 		// so T must belong to another package. No path.
 		return nil
 	case *types.Pointer:
-		return find(obj, T.Elem(), append(path, opElem))
+		return find(obj, T.Elem(), append(path, opElem), seen)
 	case *types.Slice:
-		return find(obj, T.Elem(), append(path, opElem))
+		return find(obj, T.Elem(), append(path, opElem), seen)
 	case *types.Array:
-		return find(obj, T.Elem(), append(path, opElem))
+		return find(obj, T.Elem(), append(path, opElem), seen)
 	case *types.Chan:
-		return find(obj, T.Elem(), append(path, opElem))
+		return find(obj, T.Elem(), append(path, opElem), seen)
 	case *types.Map:
-		if r := find(obj, T.Key(), append(path, opKey)); r != nil {
+		if r := find(obj, T.Key(), append(path, opKey), seen); r != nil {
 			return r
 		}
-		return find(obj, T.Elem(), append(path, opElem))
+		return find(obj, T.Elem(), append(path, opElem), seen)
 	case *types.Signature:
-		if r := findTypeParam(obj, typeparams.ForSignature(T), path); r != nil {
+		if r := findTypeParam(obj, typeparams.ForSignature(T), path, seen); r != nil {
 			return r
 		}
-		if r := find(obj, T.Params(), append(path, opParams)); r != nil {
+		if r := find(obj, T.Params(), append(path, opParams), seen); r != nil {
 			return r
 		}
-		return find(obj, T.Results(), append(path, opResults))
+		return find(obj, T.Results(), append(path, opResults), seen)
 	case *types.Struct:
 		for i := 0; i < T.NumFields(); i++ {
-			f := T.Field(i)
+			fld := T.Field(i)
 			path2 := appendOpArg(path, opField, i)
-			if f == obj {
+			if fld == obj {
 				return path2 // found field var
 			}
-			if r := find(obj, f.Type(), append(path2, opType)); r != nil {
+			if r := find(obj, fld.Type(), append(path2, opType), seen); r != nil {
 				return r
 			}
 		}
@@ -362,7 +365,7 @@
 			if v == obj {
 				return path2 // found param/result var
 			}
-			if r := find(obj, v.Type(), append(path2, opType)); r != nil {
+			if r := find(obj, v.Type(), append(path2, opType), seen); r != nil {
 				return r
 			}
 		}
@@ -374,7 +377,7 @@
 			if m == obj {
 				return path2 // found interface method
 			}
-			if r := find(obj, m.Type(), append(path2, opType)); r != nil {
+			if r := find(obj, m.Type(), append(path2, opType), seen); r != nil {
 				return r
 			}
 		}
@@ -384,7 +387,14 @@
 		if name == obj {
 			return append(path, opObj)
 		}
-		if r := find(obj, T.Constraint(), append(path, opConstraint)); r != nil {
+		if seen[name] {
+			return nil
+		}
+		if seen == nil {
+			seen = make(map[*types.TypeName]bool)
+		}
+		seen[name] = true
+		if r := find(obj, T.Constraint(), append(path, opConstraint), seen); r != nil {
 			return r
 		}
 		return nil
@@ -392,11 +402,11 @@
 	panic(T)
 }
 
-func findTypeParam(obj types.Object, list *typeparams.TypeParamList, path []byte) []byte {
+func findTypeParam(obj types.Object, list *typeparams.TypeParamList, path []byte, seen map[*types.TypeName]bool) []byte {
 	for i := 0; i < list.Len(); i++ {
 		tparam := list.At(i)
 		path2 := appendOpArg(path, opTypeParam, i)
-		if r := find(obj, tparam, path2); r != nil {
+		if r := find(obj, tparam, path2, seen); r != nil {
 			return r
 		}
 	}
diff --git a/go/types/objectpath/objectpath_go118_test.go b/go/types/objectpath/objectpath_go118_test.go
index 829dd13..d9735df 100644
--- a/go/types/objectpath/objectpath_go118_test.go
+++ b/go/types/objectpath/objectpath_go118_test.go
@@ -34,7 +34,7 @@
 
 type A = T[int, N]
 
-func F[FP0, FP1 any](FP0, FP1) {}
+func F[FP0 any, FP1 interface{ M() }](FP0, FP1) {}
 `},
 	}
 	paths := []pathTest{
@@ -46,6 +46,8 @@
 		// {"b", "T.T0O", "type TP0 b.TP0", ""},
 		// {"b", "T.T1O", "type TP1 b.TP1", ""},
 		{"b", "T.T1CM0", "func (interface).M0()", ""},
+		{"b", "F.T0O", "type parameter FP0 any", ""},
+		{"b", "F.T1CM0", "func (interface).M()", ""},
 		// Obj of an instance is the generic declaration.
 		// {"b", "A.O", "type b.T[b.TP0 interface{}, b.TP1 interface{M0(); M1()}] struct{}", ""},
 		{"b", "A.M0", "func (b.T[int, b.N]).M()", ""},
@@ -79,7 +81,7 @@
 		wantErr string
 	}{
 		{types.Universe.Lookup("any"), "predeclared type any = interface{} has no path"},
-		{types.Universe.Lookup("comparable"), "predeclared type comparable interface{} has no path"},
+		{types.Universe.Lookup("comparable"), "predeclared type comparable interface{comparable} has no path"},
 	} {
 		path, err := objectpath.For(test.obj)
 		if err == nil {
@@ -92,3 +94,44 @@
 		}
 	}
 }
+
+func TestGenericPaths_Issue51717(t *testing.T) {
+	pkgs := map[string]map[string]string{
+		"p": {"p.go": `
+package p
+
+type S struct{}
+
+func (_ S) M() {
+	// The go vet stackoverflow crash disappears when the following line is removed
+	panic("")
+}
+
+func F[WL interface{ N(item W) WL }, W any]() {
+}
+
+func main() {}
+`},
+	}
+	paths := []pathTest{
+		{"p", "F.T0CM0.RA0", "var  WL", ""},
+		{"p", "F.T0CM0.RA0.CM0", "func (interface).N(item W) WL", ""},
+
+		// Finding S.M0 reproduced the infinite recursion reported in #51717,
+		// because F is searched before S.
+		{"p", "S.M0", "func (p.S).M()", ""},
+	}
+
+	conf := loader.Config{Build: buildutil.FakeContext(pkgs)}
+	conf.Import("p")
+	prog, err := conf.Load()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for _, test := range paths {
+		if err := testPath(prog, test); err != nil {
+			t.Error(err)
+		}
+	}
+}