consensus/beacon: copy td value so we can modify it (ethereum#25230)

MariusVanDerWijden · blakehhuynh · commit 77828e32d13e · 2022-10-07T09:59:58.000-07:00
* consensus/beacon: copy td value so we can modify it

* consensus/beacon: copy td value so we can modify it
diff --git a/consensus/beacon/consensus.go b/consensus/beacon/consensus.go
@@ -178,6 +178,7 @@ func verifyTerminalPoWBlock(chain consensus.ChainHeaderReader, preHeaders []*typ
 	if td == nil {
 		return 0, consensus.ErrUnknownAncestor
 	}
+	td = new(big.Int).Set(td)
 	// Check that all blocks before the last one are below the TTD
 	for i, head := range preHeaders {
 		if td.Cmp(chain.Config().TerminalTotalDifficulty) >= 0 {

Original file line number	Diff line number	Diff line change
`@@ -178,6 +178,7 @@ func verifyTerminalPoWBlock(chain consensus.ChainHeaderReader, preHeaders []*typ`
`178`	`178`	`if td == nil {`
`179`	`179`	`return 0, consensus.ErrUnknownAncestor`
`180`	`180`	`}`
	`181`	`+ td = new(big.Int).Set(td)`
`181`	`182`	`// Check that all blocks before the last one are below the TTD`
`182`	`183`	`for i, head := range preHeaders {`
`183`	`184`	`if td.Cmp(chain.Config().TerminalTotalDifficulty) >= 0 {`