diff --git a/crates/language_tools/src/lsp_button.rs b/crates/language_tools/src/lsp_button.rs
index 9da38f9d6b44a7daf760419a88d07b39a684533d..2a34c17c1d145aec5bbd9bc9f6adb901ef56a007 100644
--- a/crates/language_tools/src/lsp_button.rs
+++ b/crates/language_tools/src/lsp_button.rs
@@ -125,7 +125,11 @@ impl ProcessMemoryCache {
 
     fn is_descendant_of(&self, pid: Pid, root_pid: Pid, parent_map: &HashMap<Pid, Pid>) -> bool {
         let mut current = pid;
+        let mut visited = HashSet::default();
         while current != root_pid {
+            if !visited.insert(current) {
+                return false;
+            }
             match parent_map.get(&current) {
                 Some(&parent) => current = parent,
                 None => return false,