No, because the length of the plaintext+encrypt depends only on the length of the plaintext and not on the contents of the plaintext; whereas the length of the

No, because the length of the plaintext+encrypt depends only on the length of the plaintext and not on the contents of the plaintext; whereas the length of the plaintext+compress+encrypt depends on the length of the compressed plaintext, and the length of the compressed plaintext depends on the contents of the plaintext. So, different plaintext of the same lengths, which would've resulted in plaintext+encrypt of the same length, instead results in compressed plaintext of different lengths which results in plaintext+compress+encrypt of different lengths, leaking additional information!