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Subject: bug#45617: <query-replace> loses the edit region. Works in 23.3,
 broke in 26.3
Date: Sat, 2 Jan 2021 17:05:57 -0800
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Use this c++ test:

main()

{

  int         _xx;

 

  _xx = _xx + 2;

 

  return _xx;

}

 

"query-replace" loses the edit region. 

Works in Emacs 23.3. Broke in GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)

of 2019-08-29

 

1. Select region from line 2 '{' to line 8 '}'

 

2. Do "query-replace" to begin "Query replace in region"

 

3. Do Double-click left mouse to select '_xx' on line 3

   -or-

   <down-mouse-one> "mouse-drag-region" to select '_xx' on line 3

 

4. In "Query replace in region:" window do <mouse-2> "mouse-yank-at-click"

   to insert '_xx'.

 

5. Via keyboard hit "Enter" key, now you see:

   "Query replace in region _xx with:"

 

6. Via keyboard type '_yy' and 'enter'

"Query replace in region _xx with: _yy"

 

7. Nothing happens because the region in step (1) has been lost.

    It should ask to replace 4 '_xx's in the region.


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xmlns=3D"http://www.w3.org/TR/REC-html40"><head><META =
HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
charset=3Dus-ascii"><meta name=3DGenerator content=3D"Microsoft Word 12 =
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--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><div =
style=3D'mso-element:para-border-div;border:none;border-bottom:solid =
windowtext 1.0pt;padding:0in 0in 1.0pt 0in'><p class=3DMsoNormal =
style=3D'border:none;padding:0in'>Use this c++ =
test:<o:p></o:p></p></div><p class=3DMsoNormal>main()<o:p></o:p></p><p =
class=3DMsoNormal>{<o:p></o:p></p><p class=3DMsoNormal>&nbsp; =
int&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
_xx;<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>&nbsp; _xx =3D _xx + 2;<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>&nbsp; =
return _xx;<o:p></o:p></p><div =
style=3D'mso-element:para-border-div;border:none;border-bottom:solid =
windowtext 1.0pt;padding:0in 0in 1.0pt 0in'><p class=3DMsoNormal =
style=3D'border:none;padding:0in'>}<o:p></o:p></p></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>&quot;query-replace&quot; loses the edit region. =
<o:p></o:p></p><p class=3DMsoNormal>Works in Emacs 23.3. Broke in GNU =
Emacs 26.3 (build 1, x86_64-w64-mingw32)<o:p></o:p></p><p =
class=3DMsoNormal> of 2019-08-29<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>1. Select =
region from line 2 '{' to line 8 '}'<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>2. Do =
&quot;query-replace&quot; to begin &quot;Query replace in =
region&quot;<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>3. Do Double-click left mouse to select '_xx' on line =
3<o:p></o:p></p><p class=3DMsoNormal>&nbsp;&nbsp; -or-<o:p></o:p></p><p =
class=3DMsoNormal>&nbsp;&nbsp; &lt;down-mouse-one&gt; =
&quot;mouse-drag-region&quot; to select '_xx' on line 3<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>4. In =
&quot;Query replace in region:&quot; window do &lt;mouse-2&gt; =
&quot;mouse-yank-at-click&quot;<o:p></o:p></p><p =
class=3DMsoNormal>&nbsp;&nbsp; to insert '_xx'.<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>5. Via =
keyboard hit &quot;Enter&quot; key, now you see:<o:p></o:p></p><p =
class=3DMsoNormal>&nbsp;&nbsp; &quot;Query replace in region _xx =
with:&quot;<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>6. Via keyboard type '_yy' and =
'enter'<o:p></o:p></p><p class=3DMsoNormal>&quot;Query replace in region =
_xx with: _yy&quot;<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>7. Nothing =
happens because the region in step (1) has been lost.<o:p></o:p></p><p =
class=3DMsoNormal>&nbsp;&nbsp;&nbsp; It should ask to replace 4 =
&#8216;_xx&#8217;s in the region.<o:p></o:p></p></div></body></html>
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