On Fri, Oct 9, 2015 at 11:38 AM, 蔡君琦 <caijq4ever@163.com> wrote:
> Hi,
> I copy json.el from 
> github(https://github.com/emacs-mirror/emacs/tree/master/lisp/json.el), 
> override local json.el and compile it.
> After I restart emacs, and emacs shows this error in startup:
> ---
> Warning (initialization): An error occurred while loading 
> `c:/Users/caijunqi/AppData/Roaming/.emacs.d/init.el':
> 
> error: Attempt to modify read-only object, (error)

Hi again,

I'm not sure what that error comes from. Can you produce a backtrace?

It looks like the crash happens in your init file. Can you reproduce it
starting from 'emacs -Q'?

Also, I'm unsure whether it has to do with with the commit that fixed
this bug. Could you test with a version of json.el pre commit 6b663751?

-- Simen