Re: BUG #15446: Crash on ALTER TABLE

Hi,

On 2018-10-19 23:20:10 +0000, PG Bug reporting form wrote:
> The following bug has been logged on the website:
> 
> Bug reference:      15446
> Logged by:          Dmitry Molotkov
> Email address:      aldarund@gmail.com
> PostgreSQL version: 11.0
> Operating system:   docker
> Description:        
> 
> postgres via docker.
> latest tag dont work. 
> 
> 2018-10-19 23:17:53.903 UTC [1] LOG:  server process (PID 69) was terminated
> by signal 11: Segmentation fault
> 2018-10-19 23:17:53.903 UTC [1] DETAIL:  Failed process was running: ALTER
> TABLE "admin_interface_theme" ALTER COLUMN
> "related_modal_background_opacity" TYPE varchar(5) USING
> "related_modal_background_opacity"::varchar(5)

Unfortunately this is not enough information to reproduce the
problem. It'd be very helpful if you could provide a reproducible set of
commands that trigger the crash.  Alternatively, should that prove hard,
the very least we're going to need the table definition of that
admin_interface_theme table, so we can attempt to reproduce the issue
ourselves.

Greetings,

Andres Freund