message: Fix a bug in toy LateLowering where a type conversion was using 'cast' instead of 'dyn_cast'.
diff: @@ -337,7 +337,7 @@ protected:
  /// Convert a Toy type, this gets called for block and region arguments, and
  /// attributes.
  Type convertType(Type t) override {
  - if (auto array = t.cast<toy::ToyArrayType>())
  + if (auto array = t.dyn_cast<toy::ToyArrayType>())
  return array.toMemref();
  return t;
  }
  