From 83fd251ab1bd68281a248132a35203fe0707f29b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mos=C3=A8=20Giordano?= <mose@gnu.org>
Date: Sat, 17 Jan 2026 15:46:57 +0000
Subject: [PATCH] Prefix possibly unused generated variable with `_`

In code generated by `@kernel`, the gensym-ed variable may be unused, causing
JETLS to show notes on the function definition.  Prefixing the generated name
with `_` makes the warning go away, greatly reducing noise in downstream
packages when going through JETLS diagnostic messages.
---
 src/macros.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/macros.jl b/src/macros.jl
index 696008727..2da784577 100644
--- a/src/macros.jl
+++ b/src/macros.jl
@@ -277,7 +277,7 @@ function emit_cpu(loop)
     append!(stmts, loop.allocations)
 
     # private_allocations turn into lhs = ntuple(i->rhs, length(__workitems_iterspace()))
-    N = gensym(:N)
+    N = Symbol("_", gensym(:N)) # Prefix name with `_` because it may be unused, but it's ok
     push!(stmts, :($N = length($__workitems_iterspace(__ctx__))))
 
     for stmt in loop.private_allocations