byte compiling defalias

[Dan Nicolaescu]

(defalias 'read-file-name-internal
  (completion-table-in-turn 'completion--embedded-envvar-table
                            'completion--file-name-table)
  "Internal subroutine for `read-file-name'.  Do not call this.")

is byte compiled to:

(byte-code "\300\301\302\303\304\"\305#\207" [defalias read-file-name-internal 
completion-table-in-turn completion--embedded-envvar-table 
completion--file-name-table "Internal subroutine for `read-file-name'.  Do not 
call this."] 5)

Shouldn't it be compiled to a defalias?
That way make-docstring would have a chance to extract the doc string,
so it won't end up in GC memory.