Encoding an array of composite types fails with a segmentation fault

[jacamera]

Environment:

• Ubuntu 24.04.1 LTS
• ruby 3.2.3
• pg 1.5.9

Isolated Example:

require 'pg'

map = PG::TypeMapByColumn.new([PG::TextEncoder::Integer.new, PG::TextEncoder::String.new])
record_encoder = PG::TextEncoder::Record.new(type_map: map)
array_encoder = PG::TextEncoder::Array.new(elements_type: record_encoder)
array_encoder.encode([[123, 'Main St.']])

Log Output:
log.txt

[jacamera]

Thanks for fixing this so quickly!

[larskanis]

Your intention seems to be to encode a record into an array. This doesn't work so far, but I implemented #622 to make it possible. The array must be set to 1 dimension:

array_encoder = PG::TextEncoder::Array.new(elements_type: record_encoder, dimensions: 1)

[jacamera]

Yup, that seemed like a sensible workaround. For my use case I wanted to build up a record encoder and decoder dynamically for a nested graph of composite types. The decoder worked but then when I tried to re-encode the output I ran into this issue.

My use case only allows for arrays of records or primitives, not arrays of arrays, so I can just specify dimensions: 1. Though I suppose you could always just keep a count of the dimensions as well and still be able to perform round-trip encoding and decoding with any number of nested arrays which is a nice feature.