Looking at the Error Tracker crash buckets linked to from the bug description the version of the package from focal-proposed and bionic-proposed does not appear. Additionally, I was unable to find any similar looking crashes in the Error Tracker so there are no new "double free" buckets with the version of the package from -proposed. Subsequently, I'm setting the tags to verification-done.
Looking at the Error Tracker crash buckets linked to from the bug description the version of the package from focal-proposed and bionic-proposed does not appear. Additionally, I was unable to find any similar looking crashes in the Error Tracker so there are no new "double free" buckets with the version of the package from -proposed. Subsequently, I'm setting the tags to verification-done.