Elpy: Emacs 25.5 elpy 1.18

[mauriciocm9]

Hi everyone, I have been using elpy 1.16.1 in my laptop and it works fine, but recently i move my emacs configuration to another computer and install elpy 1.18 but when i open my emacs editor the next error appear

Debugger entered--Lisp error: (void-variable xref-location-marker) byte-code("\306\307!\203\201
\310\311\312\313#\210\314\315\316\317#\210\314\320\321\322#\210\323\324\325\"\210\314\315\326\317#\210\314\320\327\322#\210\323\330\331\"\210\314\315\332\317#\210\314\320\333\322#\210\323\334\335\"\210\323\336\337\"\210\314\315\340\317#\210\314\320\341\322#\210\323\342\343\"\210\314\315\344\317#\210\314\320\345\322#\210\323\346\347\"\210\350C\310\311\351\352#\210\310\311\353\354#\210\310\311\355\356#\210\310\311\357\360#\210\310\346\361\360#\210\310\342\361\360#\210\310\336\361\360#\210\310\334\361\362#\210\310\330\361\360#\210\310\324\361\360#\210\323\346\363\"\210\364 \365 r\366\n\367H>\204\276

[galaunay]

Hi,

Could you enable debug on error (toggle-debug-on-error) and post the complete backtrace ?

From what I see, this is apparently due to xref not been loaded properly...
What happen if you add (require 'xref) before load elpy in your init.el ?

[mauriciocm9]

Thanks for the answer, this is what i get

Debugger entered--Lisp error: (void-variable xref-location-marker)
byte-
autoload-do-load((autoload "elpy" "Enable Elpy in all future Python buffers.\n\n(fn &optional IGNORED)" t nil) elpy-enable)
command-execute(elpy-enable record)
execute-extended-command(nil "elpy-enable" "elpy-enable")
funcall-interactively(execute-extended-command nil "elpy-enable" "elpy-enable")
call-interactively(execute-extended-command nil nil)
command-execute(execute-extended-command)

and this when i try to enable

elpy-mode: Elpy only works with ‘python-mode’
elpy-mode: Symbol’s function definition is void: elpy-modules-buffer-init
elpy-enable: Symbol’s function definition is void: elpy-modules-global-init

[galaunay]

I assume you install elpy from melpa ?

elpy-mode: Elpy only works with ‘python-mode’

This is what you are supposed to get when trying to activate elpy in a buffer that is a non-python buffer. Is this the case here ?

Adding (require 'xref) did not change anything ?

[mauriciocm9]

This is what you are supposed to get when trying to activate elpy in a buffer that is a non-python buffer. Is this the case here ?

Yes that is the case

Adding (require 'xref) did not change anything ?

Nothing change

[galaunay]

Ok, maybe xref is implemented slightly differently than we expected in the version of Emacs you are using.
Is this 24.5 (25.5 is not out yet) ?

[mauriciocm9]

25.3*

[galaunay]

This is the version I am currently using as well.
This is quite strange.
Is xref-location-marker defined after doing (require 'xref)

[mauriciocm9]

This is the version I am currently using as well.
This is quite strange.
Is xref-location-marker defined after doing (require 'xref)

Is defined but, return that is void

[jorgenschaefer]

This looks like old byte-compiled files after an Emacs upgrade (or downgrade). Could you uninstall Elpy and install it again?

[mauriciocm9]

Thanks that worked, i don't know why now works if i already tried that

[jimparker96313]

FWIW, I had the same problem (migrated to new version of Emacs with old init.el file) and was able to solve it by simply deleting the *.elc files in the .emacs.d directory. No need to re-install anything.