IExtractIconW::GetIconLocation [1] when used with GIL_ASYNC flag can return E_PENDING. In this case, the application is expected to create a background thread and call GetIconLocation without GIL_ASYNC to get the location of the icon.

It could be a very rare situation though.

Currently E_PENDING is handled by requesting a default icon instead [2].

If JDK-8289708 is implemented, the E_PENDING value could also be handled.

[1] https://docs.microsoft.com/en-us/windows/win32/api/shlobj_core/nf-shlobj_core-iextracticonw-geticonlocation
[2] https://github.com/openjdk/jdk/blob/94127f43a4a28a89094fa93cd1da49763134f9db/src/java.desktop/windows/native/libawt/windows/ShellFolder2.cpp#L941-L942