Proptest testing!

src/backend/error.rs

@@ -1,7 +1,7 @@
-use codespan_reporting::diagnostic::Diagnostic;
-use cranelift_codegen::{CodegenError, settings::SetError, isa::LookupError};
-use cranelift_module::ModuleError;
 use crate::backend::runtime::RuntimeFunctionError;
+use codespan_reporting::diagnostic::Diagnostic;
+use cranelift_codegen::{isa::LookupError, settings::SetError, CodegenError};
+use cranelift_module::ModuleError;
 use thiserror::Error;
 
 #[derive(Debug, Error)]
@@ -44,4 +44,3 @@ impl From<BackendError> for Diagnostic<usize> {
         }
     }
 }
-