Fix race in the tests

Author: matklad

crates/ra_prof/src/lib.rs

@@ -339,6 +339,14 @@ pub fn print_backtrace() {
     let bt = backtrace::Backtrace::new();
     eprintln!("{:?}", bt);
 }
+#[cfg(not(feature = "backtrace"))]
+pub fn print_backtrace() {
+    eprintln!(
+        r##"enable the backtrace feature:
+    ra_prof = { path = "../ra_prof", features = [ "backtrace"] }
+"##
+    );
+}
 
 thread_local!(static IN_SCOPE: RefCell<bool> = RefCell::new(false));
 

crates/rust-analyzer/tests/heavy_tests/support.rs

@@ -83,9 +83,10 @@ pub fn project(fixture: &str) -> Server {
 pub struct Server {
     req_id: Cell<u64>,
     messages: RefCell<Vec<Message>>,
-    dir: TempDir,
     _thread: jod_thread::JoinHandle<()>,
     client: Connection,
+    /// XXX: remove the tempdir last
+    dir: TempDir,
 }
 
 impl Server {