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bug#11308: 24.1.50; More completion confusion

From: Drew Adams
Subject: bug#11308: 24.1.50; More completion confusion
Date: Sat, 21 Apr 2012 13:57:35 -0700

Nothing new.  Just another example of how completion with multiple
styles chained together can be confusing.  At least that's what I
suppose the culprit is (without looking).
emacs -Q
M-x find-library RET isearch.e
Put point at bol (i.e. on/just before the `i') and hit TAB.  You get
(only) the completion isearch.elc.  And point is not moved to eol: it
stays where it was.
Or put point on `.' - same thing.  But quicker - when point is on the
`i' it takes a while.
But putting point on or after the second `e' gives isearch.el as the
only completion.  Likewise, point on the `h', the `c', the `r', the `a',
and the `s'.
But first complete with point at bol (on `i'), then remove the final
`lc' and move point to the `s'.  TAB then completes to isearch.el, as
before, but this time with the message [Complete but not unique], which
was not shown before with point at the same place (on `s').
Well not quite.  _Sometimes_ you will see [Complete but not unique] when
you follow that recipe.  Sometimes you will not.  Depends on the tide
Hardly what I would call "least surprise".  YMMV.

In GNU Emacs (i386-mingw-nt5.1.2600)
 of 2012-04-19 on MARVIN
Bzr revision: 107968 address@hidden
Windowing system distributor `Microsoft Corp.', version 5.1.2600
Configured using:
 `configure --with-gcc (4.6) --no-opt --enable-checking --cflags

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