fix TestHashNotMarshalable

hash.go

@@ -112,14 +112,10 @@ func SHA3_512(p []byte) (sum [64]byte) {
 }
 
 var isMarshallableCache sync.Map
-var testNotMarshalable bool // Used in tests.
 
 // isHashMarshallable returns true if the memory layout of cb
 // is known by this library and can therefore be marshalled.
 func isHashMarshallable(ch crypto.Hash) bool {
-	if testNotMarshalable {
-		return false
-	}
 	if vMajor == 1 {
 		return true
 	}
@@ -235,12 +231,14 @@ func (h *evpHash) sum(out []byte) {
 	runtime.KeepAlive(h)
 }
 
+var testNotMarshalable bool // Used in tests.
+
 // hashState returns a pointer to the internal hash structure.
 //
 // The EVP_MD_CTX memory layout has changed in OpenSSL 3
 // and the property holding the internal structure is no longer md_data but algctx.
 func (h *evpHash) hashState() unsafe.Pointer {
-	if !h.marshallable {
+	if !h.marshallable || testNotMarshalable {
 		return nil
 	}
 	switch vMajor {