Manuel Sugawara wrote:

I have a simple query that uses digest(data, 'sha1') and consistently
crashes the backend


The problem is with null arguments:

ciencias=# select digest(null, 'sha1');
el servidor ha cerrado la conexión inesperadamente,

Can you check if the function is defined "STRICT"? That should automatically return null if a parameter is null without calling the function.

Simplest way to check is probably to pg_dump --schema-only and search for the function defn.

--
  Richard Huxton
  Archonet Ltd

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