bug#47456: 27.1; emacs hangs using aspell in auctex

[Eli Zaretskii]

> From: Brian Elmegaard <be@mek.dtu.dk>
> CC: "47456@debbugs.gnu.org" <47456@debbugs.gnu.org>
> Date: Tue, 30 Mar 2021 12:50:59 +0000
> 
> Without DICTIONARY set I get:
> SEARCH PATH:
> .;c:/msys64/mingw64/bin/;c:/msys64/mingw64/share/hunspell;c:/msys64/mingw64/share/myspell;c:/msys64/mingw64/share/myspell/dicts;c:/msys64;%USERPROFILE%/Application
>  Data/OpenOffice.org 2/user/wordbook;c:/msys64/mingw64/share/dict/ooo;
> AVAILABLE DICTIONARIES (path is not mandatory for -d option):
> c:/msys64/mingw64/share/hunspell/en_AG
> c:/msys64/mingw64/share/hunspell/en_AU-large
> c:/msys64/mingw64/share/hunspell/en_AU
> c:/msys64/mingw64/share/hunspell/en_BS
> c:/msys64/mingw64/share/hunspell/en_BW
> c:/msys64/mingw64/share/hunspell/en_BZ
> c:/msys64/mingw64/share/hunspell/en_CA
> c:/msys64/mingw64/share/hunspell/en_DK
> c:/msys64/mingw64/share/hunspell/en_GB
> c:/msys64/mingw64/share/hunspell/en_GH
> c:/msys64/mingw64/share/hunspell/en_HK
> c:/msys64/mingw64/share/hunspell/en_IE
> c:/msys64/mingw64/share/hunspell/en_IN
> c:/msys64/mingw64/share/hunspell/en_JM
> c:/msys64/mingw64/share/hunspell/en_NA
> c:/msys64/mingw64/share/hunspell/en_NG
> c:/msys64/mingw64/share/hunspell/en_NZ
> c:/msys64/mingw64/share/hunspell/en_PH
> c:/msys64/mingw64/share/hunspell/en_SG
> c:/msys64/mingw64/share/hunspell/en_TT
> c:/msys64/mingw64/share/hunspell/en_US-large
> c:/msys64/mingw64/share/hunspell/en_US
> c:/msys64/mingw64/share/hunspell/en_ZA
> c:/msys64/mingw64/share/hunspell/en_ZW
> c:/msys64/mingw64/share/myspell/dicts/en_AG
> c:/msys64/mingw64/share/myspell/dicts/en_AU-large
> c:/msys64/mingw64/share/myspell/dicts/en_AU
> c:/msys64/mingw64/share/myspell/dicts/en_BS
> c:/msys64/mingw64/share/myspell/dicts/en_BW
> c:/msys64/mingw64/share/myspell/dicts/en_BZ
> c:/msys64/mingw64/share/myspell/dicts/en_CA
> c:/msys64/mingw64/share/myspell/dicts/en_DK
> c:/msys64/mingw64/share/myspell/dicts/en_GB
> c:/msys64/mingw64/share/myspell/dicts/en_GH
> c:/msys64/mingw64/share/myspell/dicts/en_HK
> c:/msys64/mingw64/share/myspell/dicts/en_IE
> c:/msys64/mingw64/share/myspell/dicts/en_IN
> c:/msys64/mingw64/share/myspell/dicts/en_JM
> c:/msys64/mingw64/share/myspell/dicts/en_NA
> c:/msys64/mingw64/share/myspell/dicts/en_NG
> c:/msys64/mingw64/share/myspell/dicts/en_NZ
> c:/msys64/mingw64/share/myspell/dicts/en_PH
> c:/msys64/mingw64/share/myspell/dicts/en_SG
> c:/msys64/mingw64/share/myspell/dicts/en_TT
> c:/msys64/mingw64/share/myspell/dicts/en_US-large
> c:/msys64/mingw64/share/myspell/dicts/en_US
> c:/msys64/mingw64/share/myspell/dicts/en_ZA
> c:/msys64/mingw64/share/myspell/dicts/en_ZW
> Can't open affix or dictionary files for dictionary named "default".
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
That's your problem, right there.  By default, Hunspell looks for a
dictionary called "default".  If you always use the en_US dictionary
by default, simply copy en_US.dic to default.dic and en_US.aff to
default.aff (in the same directory), and then the problem will go
away.

Another measure that I would recommend is to copy en_US.* into the
corresponding ENU.* files.  That is because Windows locale names are
different from Posix ones: what is called en_US on Posix platforms is
called ENU on Windows.  When Hunspell is run by Emacs, Emacs by
default instructs it to load the dictionary that corresponds to the
locale, or "default" if the locale-specific name fails, and so ENU.dic
will also work.