1 files changed, 6 insertions, 2 deletions
diff --git a/backend/lib/CodeGen/InstructionDescriptor.cpp b/backend/lib/CodeGen/InstructionDescriptor.cpp
index 48d4f10..fa00537 100644
--- a/backend/lib/CodeGen/InstructionDescriptor.cpp
+++ b/backend/lib/CodeGen/InstructionDescriptor.cpp
@@ -395,8 +395,12 @@ Expected<void> InstructionSet::validateExplicitOperands(const InstructionDescrip
     }
     const OperandDescriptor &OperandDesc = descriptorForOperand(Descriptor, *Shape, Index);
     const auto Validation = validateOperand(OperandDesc, Operand, RegInfo);
-    if (!Validation)
-      return std::unexpected(Validation.error());
+    if (!Validation) {
+      return makeUnexpected(
+          Validation.error().code(),
+          "operand " + std::to_string(Index) + " of '" + Descriptor.Name + "': " +
+              std::string(Validation.error().message()));
+    }
     if (Operand.isRegister()) {
       if (isDefRole(OperandDesc.RegisterRole)) {
         if (SawUse) {