MustWaitDownload: "invalid memory address or nil pointer dereference"

[jvegaseg]

Rod Version: v0.114.2.

From time to time, I get this error:

error => error value: "invalid memory address or nil pointer dereference"
goroutine 452393 [running]:
runtime/debug.Stack()
/usr/local/go/src/runtime/debug/stack.go:24 +0x67
github.com/go-rod/rod.Try.func1()
/root/go/pkg/mod/github.com/go-rod/rod@v0.114.2/utils.go:213 +0x47
panic({0x299c7a0?, 0x45e1810?})
/usr/local/go/src/runtime/panic.go:920 +0x270
github.com/go-rod/rod.(*Browser).MustWaitDownload.func1()
/root/go/pkg/mod/github.com/go-rod/rod@v0.114.2/must.go:127 +0xb4

The code which generates the error is very simple.

err = rod.Try(func() {
   wait := b.Browser.Timeout(options.Timeout).MustWaitDownload()
   el.MustClick()
   content = wait()
})

Seems something internal to rod.

[github-actions]

Please fix the format of your markdown:

30 MD012/no-multiple-blanks Multiple consecutive blank lines [Expected: 1; Actual: 2]
31 MD012/no-multiple-blanks Multiple consecutive blank lines [Expected: 1; Actual: 3]

_{generated by check-issue}

[ysmood]

Could you provide more info to help us reproduce it?

[jvegaseg]

Of course, here you have some logs issued by ROD package and the callstack when panics.
Take in account that it is very random, sometimes it works and sometimes not.

`[2023-12-04 22:30:45.8625] DEBUG  : [3]: [ROD] => [wait]stable<page:F419AE4C>
[2023-12-04 22:30:46.5122] DEBUG  : [3]: [ROD] => [wait]dom-stable<page:F419AE4C>
[2023-12-04 22:30:46.5127] DEBUG  : [3]: [ROD] => [wait]load<page:F419AE4C>
[2023-12-04 22:30:46.5136] DEBUG  : [3]: [ROD] => [wait]request-idle<page:F419AE4C>
[2023-12-04 22:30:46.5546] DEBUG  : [3]: [ROD] => [wait requests idle]map[excludes:[] includes:[]] <page:F419AE4C>
[2023-12-04 22:30:47.5636] DEBUG  : [3]: [ROD] => [wait requests]<page:F419AE4C> map[]
[2023-12-04 22:30:49.7304] DEBUG  : [3]: [ROD] => [query]rod.element(".frame")  <page:F419AE4C>
[2023-12-04 22:30:49.7446] DEBUG  : [3]: [ROD] => [query]rod.element("#cuentaCompleta0")  <page:F419AE4C>
[2023-12-04 22:30:49.7605] DEBUG  : [3]: [ROD] => [query]rod.element("input[name=\"t_divisa\"]")  <page:F419AE4C>
[2023-12-04 22:30:49.7690] DEBUG  : [3]: [ROD] => [query]rod.element("#listIcons > ul > li:nth-child(1) > a")  <page:F419AE4C>
[2023-12-04 22:30:49.7785] DEBUG  : [3]: [ROD] => [wait]interactable<a.ico_excelFile>
[2023-12-04 22:30:49.7869] DEBUG  : [3]: [ROD] => [input]scroll into view<a.ico_excelFile>
[2023-12-04 22:30:49.7886] DEBUG  : [3]: [ROD] => [wait]visible<a.ico_excelFile>
[2023-12-04 22:30:49.7942] DEBUG  : [3]: [ROD] => [wait]stable RAF<a.ico_excelFile>
[2023-12-04 22:30:49.8425] DEBUG  : [3]: [ROD] => [wait]enabled<a.ico_excelFile>
[2023-12-04 22:30:49.8458] DEBUG  : [3]: [ROD] => [input]left click<a.ico_excelFile>
[2023-12-04 22:31:19.7794] DEBUG  : [1]: DownloadOnClick: #listIcons > ul > li:nth-child(1) > a => error value: "invalid memory address or nil pointer dereference"
goroutine 15916 [running]:
runtime/debug.Stack()
        /usr/local/go/src/runtime/debug/stack.go:24 +0x67
github.com/go-rod/rod.Try.func1()
        /root/go/pkg/mod/github.com/go-rod/rod@v0.114.5/utils.go:213 +0x47
panic({0x29fb000?, 0x463ec50?})
        /usr/local/go/src/runtime/panic.go:920 +0x270
github.com/go-rod/rod.(*Browser).MustWaitDownload.func1()
        /root/go/pkg/mod/github.com/go-rod/rod@v0.114.5/must.go:128 +0xb4
vegator/vgtlib/navigator.(*Navigator).DownloadOnClick.func1()
        /opt/vegator/vgtlib/navigator/rod.go:339 +0xaf
github.com/go-rod/rod.Try(0xc000c295a0)
        /root/go/pkg/mod/github.com/go-rod/rod@v0.114.5/utils.go:217 +0x6c
vegator/vgtlib/navigator.(*Navigator).DownloadOnClick(0xc0003fb030, {0x2d718ff, 0x25}, {0xc001039400, 0x38}, {0x0, 0x0, 0x0})
        /opt/vegator/vgtlib/navigator/rod.go:336 +0x24e
`