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NPD when calling deferred handle.Dispose #4279

@ankur22

Description

@ankur22

Brief summary

Here's the stack trace:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x13957a1]

goroutine 1517439 [running]:
go.k6.io/k6/js/modules/k6/browser/common.(*Frame).waitForSelector.func1()
go.k6.io/k6/js/modules/k6/browser/common/frame.go:505 +0x21
go.k6.io/k6/js/modules/k6/browser/common.(*Frame).waitForSelector(0xc004638fc0, {0xc00041e2d0, 0x2a}, 0xc00005d3e0)
go.k6.io/k6/js/modules/k6/browser/common/frame.go:511 +0x434
go.k6.io/k6/js/modules/k6/browser/common.(*Frame).typ.(*Frame).newAction.func2({0x1f9f158, 0xc001bee770}, 0xc004f21340, 0xc004f21c70)
go.k6.io/k6/js/modules/k6/browser/common/frame.go:2111 +0xfb
created by go.k6.io/k6/js/modules/k6/browser/common.call in goroutine 1517438
go.k6.io/k6/js/modules/k6/browser/common/helpers.go:104 +0x14c

Looking at the code in question:

		defer func() {
			if err := handle.Dispose(); err != nil {
				err = fmt.Errorf("disposing element handle: %w", err)
				rerr = errors.Join(err, rerr)
			}
		}()
		if handle, err = ec.adoptElementHandle(handle); err != nil {
			return nil, fmt.Errorf("waiting for selector %q: adopting element handle: %w", selector, err)
		}

If an error is returned from ec.adoptElementHandle it overwrites the handle with a nil. The deferred function tries to use the handle but fails with an NPD since it is now nil.

k6 version

v0.56.0

OS

na

Docker version and image (if applicable)

No response

Steps to reproduce the problem

NA

Expected behaviour

Don't NPD

Actual behaviour

NPD

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