From 5535a1383611425a245002126eaf39734e590f1c Mon Sep 17 00:00:00 2001
From: Shuhei Kadowaki <aviatesk@gmail.com>
Date: Wed, 18 Jun 2025 01:03:15 +0900
Subject: [PATCH] fix fallback code path in `take!(::IOBuffer)` method

JET told me that the `data` local variable was inparticular is
undefined at this point.
After reviewing this code, I think this code path is unreachable
actually since `bytesavailable(io::IOBuffer)` returns `0` when
`io` has been closed. So it's probably better to make it clear.
---
 base/iobuffer.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/base/iobuffer.jl b/base/iobuffer.jl
index b2e51618a8835..dd3b757c0e3f0 100644
--- a/base/iobuffer.jl
+++ b/base/iobuffer.jl
@@ -771,7 +771,7 @@ function take!(io::IOBuffer)
         elseif io.writable
             data = wrap(Array, memoryref(io.data, io.ptr), nbytes)
         else
-            data = read!(io, data)
+            error("Unreachable IOBuffer state")
         end
     end
     if io.writable