vscode extension includes not working well on macos

I have been using the vscode extension on macos with embree and have found that include paths are not working.

I have the following includes in the file I am trying to compile.

```
#include
#include "float3.ih"
#include "util.ih"
```

because I can't specify the include path in the settings I get the error -
`fatal error: 'embree3/rtcore.isph' file not found #include `

If I change the include for embree to `#include ` I receive the error:
`fatal error: 'float3.ih' file not found #include "float3.ih"` and

```
/Users/ispc/ispc_release2/src/stmt.cpp:3597: Assertion failed: "!printImplArgs.empty() && "Haven't managed to produce __do_print args"".
***
*** Please file a bug report at https://github.com/ispc/ispc/issues
*** (Including as much information as you can about how to reproduce this error).
*** You have apparently encountered a bug in the compiler that we'd like to fix!
***
/Users/ispc/ispc_release2/src/main.cpp(385): FATAL ERROR: Unhandled signal sent to process; terminating.
```

If I run ispc from the command line it compiles properly in both cases