r - Strange "No documentation" error in ESS -

-

if enter , eval following lines in emacs+ess:

x = list() x$a = 1 x$aa = 2

then type

x$

and wait autocompletion, ess prompt:

no documentation 'x$a' in specified packages , libraries: try '??x$a'

and file locked, in fact whole content disappear, can see error message.

here screenshots:

enter image description here

enter image description here

i using emacs 24 + ess 14.11

is there way solve problem?


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