This bug was fixed in the package initramfs-tools - 0.133ubuntu10
--------------- initramfs-tools (0.133ubuntu10) eoan; urgency=medium
* Add support for panic=-1 value (LP: #1831252)
-- Julian Andres Klode <email address hidden> Thu, 05 Sep 2019 12:31:43 +0200
This bug was fixed in the package initramfs-tools - 0.133ubuntu10
---------------
initramfs-tools (0.133ubuntu10) eoan; urgency=medium
* Add support for panic=-1 value (LP: #1831252)
-- Julian Andres Klode <email address hidden> Thu, 05 Sep 2019 12:31:43 +0200