Merge #3561 #3577

3561: feat: add debug code lens r=matklad a=hdevalke

Refs #3539

3577: Protect against infinite macro expansion in def collector r=edwin0cheng a=flodiebold

Something I noticed while trying to make macro expansion more resilient against errors.

There was a test for this, but it wasn't actually working because the first recursive expansion failed. (The comma...)

Even with this limit, that test (when fixed) still takes some time to pass because of the exponential growth of the expansions, so I disabled it and added a different one without growth.

CC @edwin0cheng 

Co-authored-by: Hannes De Valkeneer <hannes@de-valkeneer.be>
Co-authored-by: hdevalke <2261239+hdevalke@users.noreply.github.com>
Co-authored-by: Florian Diebold <florian.diebold@freiheit.com>

crates/rust-analyzer/src/world.rs

@@ -38,6 +38,7 @@ pub struct Options {
     pub inlay_hints: InlayHintsOptions,
     pub rustfmt_args: Vec<String>,
     pub cargo_watch: CheckOptions,
+    pub vscode_lldb: bool,
 }
 
 /// `WorldState` is the primary mutable state of the language server