macOS 10.12.4, locale set to En_US.UTF-8, Python 2.7.13 from Homebrew.
I have been running with this for a long time but after doing the upgrade to 2.85.1, I now get this stacktrace and calibre has to be manually killed. Any idea?
<pre>
calibre, version 2.85.1
ERROR: Startup error: There was an error during calibre startup. Parts of calibre may not function. Click Show details to learn more.
Traceback (most recent call last):
File "site-packages/calibre/gui2/main.py", line 291, in initialize_db_stage2
File "site-packages/calibre/gui2/main.py", line 226, in start_gui
File "site-packages/calibre/gui2/ui.py", line 158, in __init__
File "site-packages/calibre/gui2/ui.py", line 172, in init_iaction
File "site-packages/calibre/customize/__init__.py", line 614, in load_actual_plugin
File "lib/python2.7/importlib/__init__.py", line 37, in import_module
File "site-packages/calibre/gui2/actions/catalog.py", line 13, in <module>
File "site-packages/calibre/gui2/tools.py", line 16, in <module>
File "site-packages/calibre/gui2/convert/single.py", line 20, in <module>
File "site-packages/calibre/gui2/convert/search_and_replace.py", line 11, in <module>
File "site-packages/calibre/gui2/convert/search_and_replace_ui.py", line 155, in <module>
File "site-packages/calibre/gui2/convert/regex_builder.py", line 18, in <module>
File "site-packages/calibre/ebooks/conversion/search_replace.py", line 7, in <module>
File "site-packages/regex/__init__.py", line 673, in <module>
File "site-packages/regex/__init__.py", line 426, in _compile
File "lib/python2.7/locale.py", line 562, in getlocale
File "lib/python2.7/locale.py", line 475, in _parse_localename
ValueError: unknown locale: UTF-8
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