Merge commit '8fcbeb12' into 2022-10--update-elements (PR #459)

PR 459: Pin dependencies when using MSRV

Another "didn't test" one

Author: apoelstra

README.md

@@ -34,6 +34,14 @@ or in [the `examples/` directory](https://github.com/ElementsProject/elements-mi
 This library should always compile with any combination of features on **Rust 1.41.1**.
 
 
+Some dependencies do not play nicely with our MSRV, if you are running the tests
+you may need to pin as follows:
+
+```
+cargo update --package url --precise 2.2.2
+cargo update --package form_urlencoded --precise 1.0.1
+```
+
 ## Contributing
 Contributions are generally welcome. If you intend to make larger changes please
 discuss them in an issue before PRing them to avoid duplicate work and

contrib/test.sh

@@ -4,27 +4,22 @@ set -e
 
 FEATURES="compiler serde rand"
 
-# Use toolchain if explicitly specified
-if [ -n "$TOOLCHAIN" ]
-then
-    alias cargo="cargo +$TOOLCHAIN"
-fi
-
 cargo update -p serde --precise 1.0.142
 cargo update -p serde_derive --precise 1.0.142
 
 cargo --version
 rustc --version
 
+# Work out if we are using a nightly toolchain.
 MSRV=false
 if cargo --version | grep "1\.41\.0"; then
     MSRV=true
 fi
 
+# form_urlencoded 1.1.0 breaks MSRV.
 if [ "$MSRV" = true ]; then
     cargo update -p url --precise 2.2.2
     cargo update -p form_urlencoded --precise 1.0.1
-    cargo update -p once_cell --precise 1.13.1
 fi
 
 # Format if told to