imap crashes with message "assertion failed: (ctx->nested_parts_count > 0)" regularly

Solution Verified - Updated -

Issue

  • dovecot's imap process crashes with following message seen in the journal

    dovecot[<PID1>]: imap(<email@address>)<PID2><MSGID>:Panic: file message-parser.c: line 174 (message_part_finish): assertion failed: (ctx->nested_parts_count > 0)

Environment

  • Red Hat Enterprise Linux 8 (RHEL8)
    • dovecot (imap)

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