Fix conformance errors

implementations/rust/preserves-schema/src/support/mod.rs

@@ -53,7 +53,18 @@ pub enum ParseError {
     #[error("Input not conformant with Schema: {0}")]
     ConformanceError(&'static str),
     #[error(transparent)]
-    Preserves(#[from] preserves::error::Error),
+    Preserves(preserves::error::Error),
+}
+
+impl From<preserves::error::Error> for ParseError {
+    fn from(v: preserves::error::Error) -> Self {
+        match v {
+            preserves::error::Error::Expected(_, _) =>
+                ParseError::ConformanceError("preserves::error::Error::Expected"),
+            _ =>
+                ParseError::Preserves(v),
+        }
+    }
 }
 
 impl From<io::Error> for ParseError {