fix tests that touch the mpool; mock block must have a ParentBaseFee

chain/types/mock/chain.go

@@ -9,6 +9,7 @@ import (
 	"github.com/filecoin-project/specs-actors/actors/crypto"
 	"github.com/ipfs/go-cid"
 
+	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/chain/wallet"
 )
@@ -80,6 +81,7 @@ func MkBlock(parents *types.TipSet, weightInc uint64, ticketNonce uint64) *types
 		Height:                height,
 		ParentStateRoot:       pstateRoot,
 		BlockSig:              &crypto.Signature{Type: crypto.SigTypeBLS, Data: []byte("boo! im a signature")},
+		ParentBaseFee:         types.NewInt(uint64(build.MinimumBaseFee)),
 	}
 }