bug#46607: 25.2; Emacs hangs with Error running timer 'blink-cursor-start'

[Lars Ingebrigtsen]

Peter Flynn <peter@silmaril.ie> writes:

> Summary:
> ====================================================================
> The moment I start Emacs, I get the error message
>
> Error running timer 'blink-cursor-start': (wrong-type-argument listp
> 0.5)
>
> It then refuses all keyboard input; for example C-x d gets the error
> message Wrong type argument: listp 10
> ====================================================================

[...]

> But I don't know where blink-cursor-start is called, or why it's
> failing, but from comments in the emacs.se discussion, frame.el may be
> involved.

Could you put

(setq debug-on-error t)

in your .emacs file?  That should give you a backtrace when the function
fails, which should tell us more about where the error is.

> In GNU Emacs 25.2.2 (x86_64-pc-linux-gnu, GTK+ Version 3.22.21)
>  of 2017-09-22, modified by Debian built on lgw01-amd64-050

Emacs 25.2 is pretty old -- do you also see this in more recent Emacs
versions?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no