From 7c418c38f85778b1fb22f3b370862a87c9204ee9 Mon Sep 17 00:00:00 2001
From: 9names <60134748+9names@users.noreply.github.com>
Date: Sat, 30 Dec 2023 12:28:29 +1100
Subject: [PATCH] Pin build deps to avoid MSRV bump

---
 .github/workflows/ci.yml | 2 +-
 Cargo.toml               | 6 ++++++
 README.md                | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5b95838..8c4c8b8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
 
         include:
           # Run check with MSRV as well
-          - rust: 1.65.0
+          - rust: 1.60.0
 
     steps:
       - uses: actions/checkout@v2
diff --git a/Cargo.toml b/Cargo.toml
index 75b4e01..a667cfd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -33,6 +33,12 @@ critical-section = "1.1"
 
 [build-dependencies]
 riscv-target = "0.1.2"
+# riscv-target depends on regex, which depends on memchr.
+# memchr bumped it's MSRV to 1.61 midway through 2.6.x releases 
+# regex increased it's MSRV to 1.65 in release 1.10.x
+# pinning regex to 1.9.6 and memchr to 2.5 until we bump our MSRV above 1.60
+regex = "=1.9.6"
+memchr = "=2.5"
 
 [features]
 default = ["critical-section-impl"]
diff --git a/README.md b/README.md
index d54dd8d..889e351 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Matrix: [#bl602-rust:matrix.org](https://matrix.to/#/#bl602-rust:matrix.org)
 
 ## Minimum Supported Rust Version
 
-The minimum supported Rust version (MSRV) for this project is Rust **v1.65.0**. The
+The minimum supported Rust version (MSRV) for this project is Rust **v1.60.0**. The
 project might build on earlier versions, but this is the earliest version that
 is expected to work.