Add regression test for #17963
The panic in #17963 (closed) happened to be fixed by commit e3c374cc. This patch adds a regression test to ensure that it remains fixed.
Fixes #17963 (closed).
The panic in #17963 (closed) happened to be fixed by commit e3c374cc. This patch adds a regression test to ensure that it remains fixed.
Fixes #17963 (closed).