fix unwrap (#6825)

* fix unwrap

Signed-off-by: Jess Frazelle <github@jessfraz.com>

* add test

Signed-off-by: Jess Frazelle <github@jessfraz.com>

* updates

Signed-off-by: Jess Frazelle <github@jessfraz.com>

* udaptes

Signed-off-by: Jess Frazelle <github@jessfraz.com>

---------

Signed-off-by: Jess Frazelle <github@jessfraz.com>

rust/kcl-lib/src/simulation_tests.rs

@@ -2729,3 +2729,24 @@ mod involute_circular_units {
         super::execute(TEST_NAME, true).await
     }
 }
+mod panic_repro_cube {
+    const TEST_NAME: &str = "panic_repro_cube";
+
+    /// Test parsing KCL.
+    #[test]
+    fn parse() {
+        super::parse(TEST_NAME)
+    }
+
+    /// Test that parsing and unparsing KCL produces the original KCL input.
+    #[tokio::test(flavor = "multi_thread")]
+    async fn unparse() {
+        super::unparse(TEST_NAME).await
+    }
+
+    /// Test that KCL is executed correctly.
+    #[tokio::test(flavor = "multi_thread")]
+    async fn kcl_test_execute() {
+        super::execute(TEST_NAME, true).await
+    }
+}

rust/kcl-lib/src/std/args.rs

@@ -407,8 +407,15 @@ impl Args {
             })
         })?;
 
-        // TODO unnecessary cloning
-        Ok(T::from_kcl_val(&arg).unwrap())
+        T::from_kcl_val(&arg).ok_or_else(|| {
+            KclError::Semantic(KclErrorDetails {
+                source_ranges: vec![self.source_range],
+                message: format!(
+                    "This function expected the input argument to be {}",
+                    ty.human_friendly_type(),
+                ),
+            })
+        })
     }
 
     // Add a modeling command to the batch but don't fire it right away.