From 2b565612eeb5b3cc9699299cfa010124337b124b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Teemu=20P=C3=A4tsi?= <frendsick@gmail.com>
Date: Tue, 27 May 2025 16:43:43 +0300
Subject: [PATCH] expr: Fix parsing regex range quantifier

---
 src/uu/expr/src/syntax_tree.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/uu/expr/src/syntax_tree.rs b/src/uu/expr/src/syntax_tree.rs
index e660b096d..3570dd6a4 100644
--- a/src/uu/expr/src/syntax_tree.rs
+++ b/src/uu/expr/src/syntax_tree.rs
@@ -295,8 +295,9 @@ where
         if pattern_chars_clone.peek().is_none() {
             return Err(ExprError::UnmatchedOpeningBrace);
         }
-
-        quantifier.push(curr);
+        if prev != '\0' {
+            quantifier.push(prev);
+        }
         prev = curr;
     }