From 645d04012df10c847960ea97535e5ba655ad7c11 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Wed, 19 Jul 2023 09:26:56 -0700
Subject: [PATCH] Fix off by one span counter, 0 is used for call_site()

---
 precompiled/proc-macro2/src/watt/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/precompiled/proc-macro2/src/watt/mod.rs b/precompiled/proc-macro2/src/watt/mod.rs
index bb4f66a9..21ea53e1 100644
--- a/precompiled/proc-macro2/src/watt/mod.rs
+++ b/precompiled/proc-macro2/src/watt/mod.rs
@@ -35,7 +35,7 @@ fn post_increment(counter: &mut u32) -> impl FnMut() -> u32 + '_ {
 }
 
 pub fn load(buf: &mut InputBuffer) -> TokenStream {
-    let mut span_counter = 0;
+    let mut span_counter = 1;
     let mut next_span = post_increment(&mut span_counter);
     let mut next_span = || {
         let next = next_span();