From 85002b09a1858ea8a7e692f969c3c5946febc898 Mon Sep 17 00:00:00 2001
From: y21 <30553356+y21@users.noreply.github.com>
Date: Fri, 9 Jun 2023 04:57:07 +0200
Subject: [PATCH] handle exponent without digits

---
 clippy_utils/src/numeric_literal.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clippy_utils/src/numeric_literal.rs b/clippy_utils/src/numeric_literal.rs
index c225398ad2a..bbe4149fe2a 100644
--- a/clippy_utils/src/numeric_literal.rs
+++ b/clippy_utils/src/numeric_literal.rs
@@ -161,7 +161,7 @@ impl<'a> NumericLiteral<'a> {
         }
 
         if let Some((separator, exponent)) = self.exponent {
-            if exponent != "0" {
+            if !exponent.is_empty() && exponent != "0" {
                 output.push_str(separator);
                 Self::group_digits(&mut output, exponent, group_size, true, false);
             }