Can an undischarged bankrupt maintain an action for damages on a contract for personal services entered into before bankruptcy?

At p. 530 reference is made to Cohen v. Mitchell and to s. 67 of the Bankruptcy Act which is now s. 99: "The section as it stands now, however, places both real and personal after— acquired property on the same footing. It applies to after—acquired leaseholds, to a legacy and a share and a residue under a will, and to a chose in action. Consequently, until the trustee intervenes, an undischarged bankrupt can maintain an action with respect to after—acquired prop— erty; an action for damages on a contract for personal services entered into before bankruptcy, ...'"