go: regression in path/filepath test suite

[achille-roussel]

Describe the bug

Running tests for the Go standard path/filepath package is failing on wazero v1.2.0+

To Reproduce

• clone the Go source code
• from the root directory of the Go source tree, compile Go: cd src && ./make.bash
• from the root directory of the Go source tree, run the following command :

$ GOWASIRUNTIME=wazero GOROOT=$PWD GOOS=wasip1 GOARCH=wasm PATH=$PWD/misc/wasm:$PATH ./bin/go test ./src/path/filepath
--- FAIL: TestWalkSymlinkRoot (0.00s)
    --- FAIL: TestWalkSymlinkRoot/double_link_with_slash (0.00s)
        path_test.go:916: `/var/folders/qc/zv1mt0j11sscgjygfx47nxlm0000gn/T/TestWalkSymlinkRoot2033040065/001/linklink/`: Lrw-------
        path_test.go:925: Walk(`/var/folders/qc/zv1mt0j11sscgjygfx47nxlm0000gn/T/TestWalkSymlinkRoot2033040065/001/linklink/`) visited [`/var/folders/qc/zv1mt0j11sscgjygfx47nxlm0000gn/T/TestWalkSymlinkRoot2033040065/001/linklink`]; want [`/var/folders/qc/zv1mt0j11sscgjygfx47nxlm0000gn/T/TestWalkSymlinkRoot2033040065/001/linklink` `/var/folders/qc/zv1mt0j11sscgjygfx47nxlm0000gn/T/TestWalkSymlinkRoot2033040065/001/linklink/foo`]
FAIL
FAIL	path/filepath	0.322s
FAIL

Expected behavior

The test should pass.

Screenshots
If applicable, add screenshots to help explain your problem.

Environment (please complete the relevant information):

• Go version: v1.20.4
• wazero Version: v1.2.0
• Host architecture: darwin/arm64
• Runtime mode: compiler

[evacchi]

If I understood correctly, @chriso noted this is a behavioral issue of macOS and the test is being skipped in the Go codebase unless it runs on Linux

see also golang/go#59586 (comment)

[evacchi]

I think we can close this?

[chriso]

+1 to closing. We noticed that wasi-go has the same issue on macOS. Based on the discussions in golang/go#59586, we're confident it's an OS bug rather than an issue with the WASI layer.