codeLens panic when working on a include!(source)

[edwin0cheng]

Here is a MRE for this bug:

// main.rs
fn main() {
    println!("Hello, world!");
}

include!("./out.rs");

// out.rs
#[test]
fn test_out(){
}

When you go to the out.rs file, A panic is triggered:

thread 'Worker' panicked at crates/ide/src/runnables.rs:134:13:
tried adding a runnable pointing to a different file: TestMod { path: "" } for FileId(2014)
stack backtrace:
   0: rust_begin_unwind
   1: core::panicking::panic_fmt
   2: <core::iter::adapters::map::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
   3: ide::runnables::runnables
   4: ide::annotations::annotations
   5: ra_salsa::Cancelled::catch
   6: ide::Analysis::annotations
   7: rust_analyzer::handlers::request::handle_code_lens
   8: std::panic::catch_unwind
   9: core::ops::function::FnOnce::call_once{{vtable.shim}}
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
[Error - 2:19:45 PM] Request textDocument/codeLens failed.
  Message: request handler panicked: tried adding a runnable pointing to a different file: TestMod { path: "" } for FileId(2014)
  Code: -32603 
Panic context: