From 4c2a36302bec7495626250e3dd018252ec4309da Mon Sep 17 00:00:00 2001
From: Andrew Hlynskyi <ahlincq@gmail.com>
Date: Thu, 6 Apr 2023 03:59:55 +0300
Subject: [PATCH] lib: fix OOB in query engine reported in #2162

---
 lib/src/query.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/src/query.c b/lib/src/query.c
index 18bd7fd3..da7a4166 100644
--- a/lib/src/query.c
+++ b/lib/src/query.c
@@ -938,6 +938,9 @@ static inline int analysis_state__compare(
 }
 
 static inline AnalysisStateEntry *analysis_state__top(AnalysisState *self) {
+  if (self->depth == 0) {
+    return &self->stack[0];
+  }
   return &self->stack[self->depth - 1];
 }