Fix error not reported if at least one other error expected. (#485)

* fix error not reported if at least one other error expected.

* Fixed unused extern crate error if wasm feature is not enabled.

* No longer reporting deref cycles multiple times.

* Fix filetest type_check.clif.

* Switched comparison order for perf.

* Fixed isa/riscv/verify-encoding.clif filetest.

lib/filetests/src/test_verifier.rs

@@ -66,7 +66,7 @@ impl SubTest for TestVerifier {
                 for expect in expected {
                     let pos = errors
                         .iter()
-                        .position(|err| err.message.contains(expect.1) && err.location == expect.0);
+                        .position(|err| err.location == expect.0 && err.message.contains(expect.1));
 
                     match pos {
                         None => {
@@ -78,6 +78,11 @@ impl SubTest for TestVerifier {
                     }
                 }
 
+                // report remaining errors
+                for err in errors {
+                    write!(msg, "unexpected error {}", err).unwrap();
+                }
+
                 if msg.is_empty() {
                     Ok(())
                 } else {