NoMethodError in session_flusher.rb

[avdi]

Issue Description

This exception from sentry-ruby popped up on Sentry:

Reproduction Steps

We've only seen it happen once, so not sure how to reproduce.

Expected Behavior

Not an exception

Actual Behavior

An exception

Ruby Version

3.2.4

SDK Version

5.21.0

Integration and Its Version

Rails

Sentry Config

No response

[sl0thentr0py]

I'm at a loss how this could happen, this is the relevant code

sentry-ruby/sentry-ruby/lib/sentry/session_flusher.rb

Lines 31 to 33 in ceba0da

	return unless Session::AGGREGATE_STATUSES.include?(session.status)
	@pending_aggregates[session.aggregation_key] ||= init_aggregates(session.aggregation_key)
	@pending_aggregates[session.aggregation_key][session.status] += 1

EDIT: nvm, I think we need a lock, will add.