Very true, you cannot assign what is not yours. (Ianal, but I assume that means if you did sign a CLA and submit then you are breaking copyright.) But that's

Very true, you cannot assign what is not yours. (Ianal, but I assume that means if you did sign a CLA and submit then you are breaking copyright.) But that's not my point. My point is that "not signing a CLA" is only half the job. The other part of the job is actively finding out your status with your company to understand their position. (And I recommend getting that answer in writing. )