boxedwine.js: TypeError: Cannot read properties of undefined (reading 'parent')

[stasoid]

Hello, I am trying to get web version working, but stuck.
I cloned the repo and built with emscripten without errors.
I copied Debian10-Wine-5.0.zip to the same dir as boxedwine.html and renamed it to boxedwine.zip
I access boxedwine.html via web server, as suggested in this comment.
I get this error:

boxedwine.js:18 Uncaught TypeError: Cannot read properties of undefined (reading 'parent')
    at BFSEmscriptenFS.realPath (browserfs.boxedwine.js:2386)
    at BFSEmscriptenNodeOps.lookup (browserfs.boxedwine.js:2212)
    at Object.lookup (boxedwine.js:2186)
    at Object.lookupNode (boxedwine.js:1871)
    at ___syscall_getdents64 (boxedwine.js:4404)
    at readdir (0068935e:0x485e9)
    at Platform::listNodes(std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> > const&, std::__2::vector<Platform::ListNodeResult, std::__2::allocator<Platform::ListNodeResult> >&) (0068935e:0x35f78)
    at FsNode::loadChildren() (0068935e:0x1ead4)
    at Fs::getNodeFromLocalPath(std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> > const&, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> > const&, BoxedPtr<FsNode>&, std::__2::vector<std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, std::__2::allocator<std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> > > >&, bool, bool*) (0068935e:0x2eeff)
    at main (0068935e:0xd8423)

I think the problem is that it tries to access /root/base dir, which is not present in Debian10-Wine-5.0.zip
I created it manually, but it didn't help.
How can I fix this error?

Debian10-Wine-1.7.zip - same error
Manually combining debian10.zip and Wine-5.0.zip - same error

Windows 10 64 bit
Emscripten 3.0.0 run on Ubuntu 20.04 through WSL2
Chrome 96

[stasoid]

I just noticed 2 more errors at the start of console log (before message running initial setup):

boxedwine-shell.js:1188 wasm streaming compile failed: TypeError: Failed to execute 'compile' on 'WebAssembly': Incorrect response MIME type. Expected 'application/wasm'.
	printErr @ boxedwine-shell.js:1188
	(anonymous) @ boxedwine.js:611
	Promise.then (async)
	(anonymous) @ boxedwine.js:610
	Promise.then (async)
	instantiateAsync @ boxedwine.js:608
	createWasm @ boxedwine.js:629
	(anonymous) @ boxedwine.js:9289

boxedwine-shell.js:1188 falling back to ArrayBuffer instantiation

[stasoid]

I am very confused. I set a breakpoint in realPath and hit it until node becomes undefined:

Then I inspect the function that called it, lookup, and realPath argument parent is fine (not undefined):

WTF? How is that even possible? Something very wrong is going on here.

Firefox 94: everything is the same.

[stasoid]

The problem is in Emscripten 3.0.0.
I tried Emscripten 2.0.21 and the error is gone.