From d025cd829ea96f8dd35fa8bea0b03a240157a917 Mon Sep 17 00:00:00 2001
From: Ryan James Stewart <47729789+RyanJamesStewart@users.noreply.github.com>
Date: Tue, 23 Jun 2026 08:50:24 -0700
Subject: [PATCH] ci: raise is-terminal and tempfile dev floors so
 minimal-versions builds

The `Minimal versions` job (`cargo +nightly update -Zminimal-versions`
then build and test) is latently broken. Under minimal versions two
dev-dep paths resolve rustix 0.37: `codspeed-criterion-compat ->
is-terminal 0.4.6` and `proptest -> tempfile`. rustix below 0.38.6 uses
the `rustc_layout_scalar_valid_range_start` attribute, which the
compiler removed in rust-lang/rust#155433, so it no longer compiles on
current nightly (tracked in bytecodealliance/rustix#1620). The job only
still passes because it has not re-run on a post-removal nightly.

Raise two dev-dep floors so minimal versions resolves a buildable
rustix. `is-terminal = "0.4.8"` moves the codspeed path off the rustix
0.37 line, and `tempfile = "3.9"` raises the proptest path to rustix
0.38.26 -- the lowest tempfile floor whose rustix builds, since
tempfile 3.7 and 3.8 still resolve the unbuildable rustix 0.38.0. No
direct rustix floor is added, so the normal latest-versions resolution
is unchanged and keeps a single rustix.

Verified on nightly 2026-05-12: with `-Zminimal-versions`, rustix
resolves to a single 0.38.26 and `cargo build --workspace` plus
`cargo test --all-features --workspace` pass; the latest-versions build
is unaffected (single rustix 1.1.4, tests pass).
---
 Cargo.toml | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Cargo.toml b/Cargo.toml
index 3ddb24d5..4272bbf4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -39,6 +39,15 @@ criterion = { version = "4.7.0", package = "codspeed-criterion-compat" }
 env_logger = "0.11.6"
 # Lower-bound guard for `codspeed-criterion-compat` in the minimal-versions CI job.
 cc = "1.2.40"
+# Lower-bound guards to keep the transitive `rustix` buildable in the
+# minimal-versions CI job. rustix below 0.38.6 uses the
+# `rustc_layout_scalar_valid_range_start` attribute removed from the compiler in
+# rust-lang/rust#155433, so it no longer builds on nightly (see
+# bytecodealliance/rustix#1620). `codspeed-criterion-compat -> is-terminal` pulls
+# rustix 0.37 until is-terminal 0.4.8, and `proptest -> tempfile` resolves rustix
+# 0.38.0 until tempfile 3.9 raises its floor to rustix 0.38.26.
+is-terminal = "0.4.8"
+tempfile = "3.9"
 proptest = "1.6.0"
 ron = "0.12.0"
 varisat = "0.2.2"