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kern/55437: Panic: fpudna from kernel

>Number:         55437
>Category:       kern
>Synopsis:       Panic: fpudna from kernel
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jun 30 20:05:00 +0000 2020
>Originator:     Sevan Janiyan
>Release:        NetBSD-HEAD
NetBSD 9.99.68 202006300450Z amd64
Upgraded to latest available build from head (202006300450Z), attempting to compile a new kernel results in panic with string "fpudna from kernel, ip 0xffffffff802292df, trapframe 0xffffce013e4"

vpanic() at netbsd:vpanic+0x152
snprintf() at netbsd:snprintf
fpu_set_default_cw() at netbsd:fpu_set_default_cw     (no address here - sevan)
Xtrap07() at netbsd:Xtrap07+0xbd
cpu_switchto() at netbsd:cpu_switchto+0xa1
idle_loop() at netbsd:idle_loop+0x180

Install 202006300450Z amd64 build
Attempt to build a kernel

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