git tip: Error in winner-save-old-configurations (flyspell-post-command-hook): (wrong-type-argument stringp nil) [73 times]

[Sam Steingold]

Hi,
With the fresh Emacs from yesterday, I get

Error in winner-save-old-configurations (flyspell-post-command-hook): 
(wrong-type-argument stringp nil)

in the Echo Area and *Messages* on every move in an Org-mode buffer.

I don't know how to debug it (I tried stepping through
`flyspell-post-command-hook' and got nothing), so I wonder if someone
sees anything like that.

Thank you.

PS. The trivial sequence of

emacs -Q
C-x b foo RET
M-x org-mode RET
M-x winner-mode RET
M-x flyspell-mode RET
foo bar baz

does not, alas, produce the described behavior...

-- 
Sam Steingold (https://aphar.dreamwidth.org/) on darwin Ns 10.3.2113
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