codex: update TODO

[Thomas Klausner (via pkgsrc-wip) <commit-notify%pkgsrc.org@localhost>]

Module Name:	pkgsrc-wip
Committed By:	Thomas Klausner <wiz%NetBSD.org@localhost>
Pushed By:	wiz
Date:		Thu Aug 21 14:51:37 2025 +0200
Changeset:	db65f5d49c78cebda4ca1bfd77e30325c4534765

Modified Files:
	codex/TODO

Log Message:
codex: update TODO

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Please note that diffs are not public domain; they are subject to the
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diffstat:
 codex/TODO | 11 +++++++++++
 1 file changed, 11 insertions(+)

diffs:
diff --git a/codex/TODO b/codex/TODO
index c7949be92c..1ded9cc79a 100644
--- a/codex/TODO
+++ b/codex/TODO
@@ -1 +1,12 @@
 Untested.
+
+Needs rust > 1.86:
+
+error[E0658]: `let` expressions in this position are unstable
+   --> protocol/src/protocol.rs:335:24
+    |
+335 |                     && let Some(tmpdir) = std::env::var_os("TMPDIR")
+    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+    |
+    = note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
+