docstring key substitution fails to notice certain binding changes

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In GNU Emacs 20.7.1 (i386-redhat-linux-gnu, X toolkit)
 of Tue Jun 13 2000 on porky.devel.redhat.com
configured using `configure  --mandir=/usr/man --infodir=/usr/info 
--prefix=/usr --libexecdir=/usr/lib --sharedstatedir=/var --with-gcc --with-pop 
--with-x-toolkit i386-redhat-linux-gnu'

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

the docstring sequence \\[...] is supposed to replace the named
function with the key sequence that is bound to that function.  if the
function is not bound to a key sequence it produces a sequence of
"M-x" followed by the function name, even if M-x is not bound or not
bound to execute-extended-function, i.e., it should attempt to resolve
it as if \\[execute-extended-function] had preceeded \\[...].

to reproduce:

eval: (global-set-key [(meta x)] 'foo)
eval: (global-set-key [(meta ?>)] 'execute-extended-command)
type: C-h f transient-mark-mode RET
results: [...]
incremental search, M-<, and M-x end-of-buffer.

M-x should be M->

Recent input:
ESC x r e p o r t TAB RET

Recent messages:
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