crash in storage.List()

[secsys-go]

Checklist

• I have searched the issue tracker for open issues that relate to the same problem, before opening a new one.
• This issue only relates to a single bug. I will open new issues for any other problems.

Describe the bug

We used the Fuzz engine to modify some Test(TestInMemoryRepositoryListing) data, and then the following crash appeared. Although Test does not handle the error returned by (storage.ParseURI, storage.CanList(foo)), such a crash occurs when corrupt data is passed into the storage.List()

How to reproduce

The simplified test code is in Example code

Screenshots

CrashLog

panic: runtime error: index out of range [-1] [recovered]
        panic: runtime error: index out of range [-1]

goroutine 19 [running]:
testing.tRunner.func1.2({0x6f8480, 0xc0001643d8})
        /home/zjx/.local/go/src/testing/testing.go:1211 +0x24e
testing.tRunner.func1()
        /home/zjx/.local/go/src/testing/testing.go:1214 +0x218
panic({0x6f8480, 0xc0001643d8})
        /home/zjx/.local/go/src/runtime/panic.go:1038 +0x215
fyne.io/fyne/v2/internal/repository.(*InMemoryRepository).List(0xc000140180, {0x789360, 0xc00012c360})
        /home/zjx/workspace/gowork/src/purelib/crashConfirm/fyne/internal/repository/memory.go:281 +0x330
fyne.io/fyne/v2/storage.List({0x789360, 0xc00012c360})
        /home/zjx/workspace/gowork/src/purelib/crashConfirm/fyne/storage/uri.go:481 +0x58
fyne.io/fyne/v2/internal/repository.TestInMemoryRepositoryListing(0x0)
        /home/zjx/workspace/gowork/src/purelib/crashConfirm/fyne/internal/repository/memory_test.go:334 +0x309

Example code

//part of the Test Code
	m := NewInMemoryRepository("000")
	repository.Register("dht", m)
	m.Data["/foo"] = []byte{1, 2, 3}
	m.Data["/foo/bar"] = []byte{1, 2, 3}
	m.Data["/foo/baz/"] = []byte{1, 2, 3}
	m.Data["/foo/baz/quux"] = []byte{1, 2, 3}

	foo, _ := storage.ParseURI("dht:?00000")

	canList, err := storage.CanList(foo)
	listing, err := storage.List(foo)

Fyne version

commit 638ae24 (HEAD -> master, origin/master, origin/HEAD)

Go compiler version

1.17.8

Operating system

Linux

Operating system version

OS: Linux r920 4.15.0-159-generic #167-Ubuntu

Additional Information

No response