Index out of range when returning to homedir

[sarimak]

Micro 1.3.5-17 compiled today from Github + filemanager-plugin compiled today from Github. Tested on Ubuntu. golang-1.8 installed today via apt.

Repro steps:
cd ~/download
micro
Ctrl+E
tree
<navigate using PageUp and Up arrow to .. and press enter => cwd == $HOME>
<navigate using PageUp and Up arrow to .. and press enter => cwd == /home>
<navigate using PageUp and Up arrow to $USER.. and press enter>

Expected: cwd should be $HOME
Actual: micro crashes with unhandled exception:

Micro encountered an error: runtime error: index out of range
runtime.errorString runtime error: index out of range
/usr/lib/go-1.8/src/runtime/panic.go:489 (0x42a87f)
gopanic: reflectcall(nil, unsafe.Pointer(d.fn), deferArgs(d), uint32(d.siz), uint32(d.siz))
/usr/lib/go-1.8/src/runtime/panic.go:28 (0x4294fe)
panicindex: panic(indexError)
/home/sarim/go/src/github.com/zyedidia/micro/cmd/micro/cellview.go:83 (0x86a19e)
(*CellView).Draw: if start > 0 && buf.lines[start-1].rehighlight {
/home/sarim/go/src/github.com/zyedidia/micro/cmd/micro/view.go:774 (0x8cdf52)
(*View).DisplayView: v.cellview.Draw(v.Buf, top, height, left, width-v.lineNumOffset)
/home/sarim/go/src/github.com/zyedidia/micro/cmd/micro/view.go:1028 (0x8d061b)
(*View).Display: v.DisplayView()
/home/sarim/go/src/github.com/zyedidia/micro/cmd/micro/micro.go:224 (0x892001)
RedrawAll: v.Display()
/home/sarim/go/src/github.com/zyedidia/micro/cmd/micro/micro.go:463 (0x8939ac)
main: RedrawAll()
/usr/lib/go-1.8/src/runtime/proc.go:185 (0x42c66a)
main: fn()
/usr/lib/go-1.8/src/runtime/asm_amd64.s:2197 (0x4576d1)
goexit: BYTE $0x90 // NOP

[sarimak]

While the issue is easy to reproduce on Linux, I am not able to reproduce the issue on Android/Termux. The issue can be reproduced by using up arrow itself (no mix with page up) and even if I carefully press the up arrow the exact number of times to reach the .. line.

[tommyshem]

Could you please give more info for testing.
Which version of ubuntu are you using and which terminal?
Pageup is not surported yet. Only up and down arrow keys.
Can you recreate the error with just up and down arrow keys?

[sum01]

Does the folder contain a lot of things? I ran into the same issue when trying to open /usr/lib.

A fix for that is adding the folder contents line-by-line, instead of all at once like the plugin currently does.

[sarimak]

Fix confirmed, many thanks!
Micro version: 1.3.5-17 (e443ade)
Updated the filemanager plugin via plugin update filemanager