Re: backward-sexp throws scan-error "Unbalanced parentheses", but forward-sexp works

[ndame]

> Apparently, aggressive-indent-mode is the culprit. I can replicate the 
> problem with -Q and aggressive-indent-mode turned on.

Reported the problem to aggressive-indent-mode author with steps how to 
reproduce:

https://github.com/Malabarba/aggressive-indent-mode/issues/153

We'll see what he can say about it.