# must fail: param_set_sha_uppercase
# a pin whose digest is not lowercase hexadecimal read as a fault, not pin_malformed (the corpus tool's param_set)
diff --git a/wai/wai-rs/src/bin/wai_cli/http_vectors_receipts.rs b/wai/wai-rs/src/bin/wai_cli/http_vectors_receipts.rs
index 12a55982..34d16fd9 100644
--- a/wai/wai-rs/src/bin/wai_cli/http_vectors_receipts.rs
+++ b/wai/wai-rs/src/bin/wai_cli/http_vectors_receipts.rs
@@ -925,7 +925,7 @@ mod built {
         // A pin whose digest is not 64 lowercase hexadecimal digits locates no grants
         // file: the pin's own check refuses it (pin_malformed).
         let grants = match (input["grants"].as_str(), unhex32(sha)) {
-            (Some(p), Some(d)) => read_grants_file(&d, &c.file(p)?).map_err(|e| Stop::Fault(format!("the grants file: {e}")))?,
+            (Some(p), d) => read_grants_file(&d.ok_or(Stop::Fault("sha256 is not a hash".into()))?, &c.file(p)?).map_err(|e| Stop::Fault(format!("the grants file: {e}")))?,
             _ => Vec::new(),
         };
         let mut sink = SinkKeyLog::new(revs, anchors).with_statuses(statuses).with_grants(grants);