I see what's happening. The PR originator versions are very out of date.

hopefully this fixes the issue.

Author: bunnie

kernel/Cargo.toml

@@ -4,7 +4,7 @@ description = "Core kernel for Xous, including task switching and memory managem
 license = "MIT OR Apache-2.0"
 edition = "2018"
 name = "xous-kernel"
-version = "0.9.15"
+version = "0.9.18"
 resolver = "2"
 
 # Dependency versions enforced by Cargo.lock.