crash> bt/a ffffa755807c9c00 trace: pid 556 lid 556 at 0xffffffff8069dab2 comintr() at comintr+0x313This one is: 556 > 556 7 0 8020000 ffffa755807c9c00 ttyflags Now that's weird -- this crash dump is from the REMOTE machine using ucom0, isn't it? Not the TARGET machine using com0? So it's curious that comintr should appear in the stack trace of the ttyflags program.
No, the crash dump is from the TARGET machine using com0. I have edited the PR to fix my mistake in the description of the problem.
Any chance you could make the kernel and core dump available?
The kernel and core are now available from: http://ftp.triaxx.org/pub/NetBSD/dumps/NetBSD-10.99.10/