Bug#1004740: exim4: SIGSEGV (maybe attempt to write to immutable memory) when sending a mail; message frozen

[Vincent Lefevre]

On 2022-02-01 14:44:21 +0100, Vincent Lefevre wrote:
> 2022-02-01 14:23:23 1nEt2b-0008jG-97 SIGSEGV (maybe attempt to write to immutable memory)
> 2022-02-01 14:23:23 1nEt2b-0008jG-97 Delivery status for xxx at yyy: got 0 of 7 bytes (pipeheader) from transport process 35015 for transport smtp

And at midnight, root at cventin.lip.ens-lyon.fr got a mail with

  exim paniclog /var/log/exim4/paniclog on cventin.lip.ens-lyon.fr
  has non-zero size, mail system might be broken. Up to 10 lines
  are quoted below.

and the above two lines.

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Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)