Micro encountered an error: runtime.errorString runtime error: invalid memory address or nil pointer dereference

Description of the problem or steps to reproduce

Specifications

Commit hash:
OS: ubuntu
Terminal:

liuhy@t480:~/learning/notes$ micro
Micro encountered an error: runtime.errorString runtime error: invalid memory address or nil pointer dereference
runtime/panic.go:212 (0x4365db)
runtime/signal_unix.go:734 (0x44f853)
github.com/zyedidia/micro/v2/internal/action/tab.go:292 (0x946ace)
github.com/zyedidia/micro/v2/internal/action/tab.go:155 (0x947975)
github.com/zyedidia/micro/v2/internal/action/termpane.go:98 (0x94778c)
github.com/zyedidia/micro/v2/internal/action/termpane.go:200 (0x94809c)
github.com/zyedidia/micro/v2/internal/action/termpane.go:26 (0x94b102)
github.com/zyedidia/micro/v2/internal/action/termpane.go:133 (0x947fae)
github.com/zyedidia/micro/v2/internal/action/tab.go:254 (0x946570)
github.com/zyedidia/micro/v2/internal/action/tab.go:136 (0x945caa)
github.com/zyedidia/micro/v2/cmd/micro/micro.go:445 (0x96e585)
github.com/zyedidia/micro/v2/cmd/micro/micro.go:382 (0x96dfcc)
runtime/proc.go:225 (0x43b516)
runtime/asm_amd64.s:1371 (0x46f9a1)

If you can reproduce this error, please report it at https://github.com/zyedidia/micro/issues

Start by reproducing the crash with micro on Ubuntu, then inspect internal/action/tab.go around line 292 and follow the call chain from cmd/micro/micro.go. The issue is resolved when launching micro no longer produces the reported nil-pointer panic; the missing commit hash and terminal details may limit reproduction.