Caught panic: runtime error: invalid memory address or nil pointer dereference

[vkd]

Version:

⇒ fx --version
30.0.2
⇒ go version
go version go1.21.1 darwin/arm64

How to reproduce: Execute command echo '{"name": "mike"}' | fx and press Space and then Left (<-).

Logs:

⇒ echo '{"name": "mike"}' | fx
Caught panic:

runtime error: invalid memory address or nil pointer dereference

Restoring terminal...

goroutine 1 [running]:
runtime/debug.Stack()
 /usr/local/go/src/runtime/debug/stack.go:24 +0x64
runtime/debug.PrintStack()
 /usr/local/go/src/runtime/debug/stack.go:16 +0x1c
github.com/charmbracelet/bubbletea.(*Program).Run.func1()
 /src/go/pkg/mod/github.com/charmbracelet/bubbletea@v0.24.2/tea.go:440 +0x88
panic({0x1027dbde0?, 0x102909470?})
 /usr/local/go/src/runtime/panic.go:920 +0x26c
main.(*node).hasChildren(...)
 /src/go/pkg/mod/github.com/antonmedv/fx@v0.0.0-20230919114525-adf377582815/node.go:72
main.(*model).handleKey(0x1400016a000, {0xfffffffffffffffb, {0x0, 0x0, 0x0}, 0x0})
 /src/go/pkg/mod/github.com/antonmedv/fx@v0.0.0-20230919114525-adf377582815/main.go:368 +0x48f0
main.(*model).Update(0x14000122370?, {0x1027eea80?, 0x1400010f770?})
 /src/go/pkg/mod/github.com/antonmedv/fx@v0.0.0-20230919114525-adf377582815/main.go:215 +0x30c
github.com/charmbracelet/bubbletea.(*Program).eventLoop(0x1400016c000, {0x1028063b8?, 0x1400016a000?}, 0x1028062c8?)
 /src/go/pkg/mod/github.com/charmbracelet/bubbletea@v0.24.2/tea.go:373 +0x5cc
github.com/charmbracelet/bubbletea.(*Program).Run(0x1400016c000)
 /src/go/pkg/mod/github.com/charmbracelet/bubbletea@v0.24.2/tea.go:503 +0x6ac
main.main()
 /src/go/pkg/mod/github.com/antonmedv/fx@v0.0.0-20230919114525-adf377582815/main.go:140 +0xe48