byte-compile-bind
byte-compile-bind is a compiled Lisp function in `bytecomp.el
'.
(byte-compile-bind VAR INIT-LEXENV)
Emit byte-codes to bind VAR and update `byte-compile--lexical-environment'.
INIT-LEXENV should be a lexical-environment alist describing the
positions of the init value that have been pushed on the stack.
Return non-nil if the TOS value was popped.