bug#33561: when opening a msg with a 4 MB attachment emacs (master) consumes 6.4 GB of RAM

[Uwe Brauer]

Hi 

I tried to open a msg which contained an attachment of 3.9 MB, my system
with 8 GB got almost frozen and 
#!/usr/bin/python

# -*- coding: utf-8 -*-
import re
import sys

from ps_mem import main

if __name__ == '__main__':
    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
    sys.exit(main())

Told me 
rivate  +   Shared  =  RAM used       Program

 6.6 GiB + 343.5 KiB =   6.6 GiB       emacs-27.0.50

This cannot be good.

Gnus v5.13
GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2018-04-26
200 news.gmane.org InterNetNews NNRP server INN 2.5.4 ready (posting ok)
100 Legal commands
  ARTICLE [message-ID|number]
  AUTHINFO USER name|PASS password|SASL mechanism [initial-response]|GENERIC 
program [argument ...]
  BODY [message-ID|number]
  CAPABILITIES [keyword]
  DATE
  GROUP newsgroup
  HDR header [message-ID|range]
  HEAD [message-ID|number]
  HELP
  IHAVE message-ID
  LAST
  LIST [ACTIVE [wildmat]|ACTIVE.TIMES [wildmat]|COUNTS 
[wildmat]|DISTRIB.PATS|DISTRIBUTIONS|HEADERS 
[MSGID|RANGE]|MODERATORS|MOTD|NEWSGROUPS [wildmat]|OVERVIEW.FMT|SUBSCRIPTIONS 
[wildmat]]
  LISTGROUP [newsgroup [range]]
  MODE READER
  NEWGROUPS [yy]yymmdd hhmmss [GMT]
  NEWNEWS wildmat [yy]yymmdd hhmmss [GMT]
  NEXT
  OVER [range]
  POST
  QUIT
  STARTTLS
  STAT [message-ID|number]
  XGTITLE [wildmat]
  XHDR header [message-ID|range]
  XOVER [range]
  XPAT header message-ID|range pattern [pattern ...]
Report problems to <usenet@blaine.gmane.org>.
.
382 Begin TLS negotiation now
100 Legal commands
  ARTICLE [message-ID|number]
  AUTHINFO USER name|PASS password|SASL mechanism [initial-response]|GENERIC 
program [argument ...]
  BODY [message-ID|number]
  CAPABILITIES [keyword]
  DATE
  GROUP newsgroup
  HDR header [message-ID|range]
  HEAD [message-ID|number]
  HELP
  IHAVE message-ID
  LAST
  LIST [ACTIVE [wildmat]|ACTIVE.TIMES [wildmat]|COUNTS 
[wildmat]|DISTRIB.PATS|DISTRIBUTIONS|HEADERS 
[MSGID|RANGE]|MODERATORS|MOTD|NEWSGROUPS [wildmat]|OVERVIEW.FMT|SUBSCRIPTIONS 
[wildmat]]
  LISTGROUP [newsgroup [range]]
  MODE READER
  NEWGROUPS [yy]yymmdd hhmmss [GMT]
  NEWNEWS wildmat [yy]yymmdd hhmmss [GMT]
  NEXT
  OVER [range]
  POST
  QUIT
  STARTTLS
  STAT [message-ID|number]
  XGTITLE [wildmat]
  XHDR header [message-ID|range]
  XOVER [range]
  XPAT header message-ID|range pattern [pattern ...]
Report problems to <usenet@blaine.gmane.org>.
.