diff --git a/core/src/avm1/globals/color_matrix_filter.rs b/core/src/avm1/globals/color_matrix_filter.rs
index e977d9664af1..7eb8e4c14724 100644
--- a/core/src/avm1/globals/color_matrix_filter.rs
+++ b/core/src/avm1/globals/color_matrix_filter.rs
@@ -61,10 +61,9 @@ impl<'gc> ColorMatrixFilter<'gc> {
     }
 
     fn matrix(self, activation: &mut Activation<'_, 'gc>) -> Value<'gc> {
-        // Use `.as_slice_of_cells()` to avoid a copy out of the `Cell`.
-        // FIXME: use `.as_array_of_cells()` once stabilized.
-        let matrix: &Cell<[f32]> = &self.0.matrix;
-        let matrix = matrix.as_slice_of_cells();
+        // Use `.as_array_of_cells()` to avoid a copy out of the `Cell`.
+        let matrix = self.0.matrix.as_array_of_cells();
+
         ArrayBuilder::new(activation)
             .with(matrix.iter().map(|v| v.get().into()))
             .into()
diff --git a/desktop/src/main.rs b/desktop/src/main.rs
index 385c2f1e711c..814db540c84d 100644
--- a/desktop/src/main.rs
+++ b/desktop/src/main.rs
@@ -81,18 +81,8 @@ fn panic_hook(info: &PanicHookInfo) {
         }
     });
 
-    // [NA] Let me just point out that PanicInfo::message() exists but isn't stable and that sucks.
-    let panic_text = info.to_string();
-    let message = if let Some(text) = panic_text.strip_prefix("panicked at '") {
-        let location = info.location().map(|l| l.to_string()).unwrap_or_default();
-        if let Some(text) = text.strip_suffix(&format!("', {location}")) {
-            text.trim()
-        } else {
-            text.trim()
-        }
-    } else {
-        panic_text.trim()
-    };
+    let message = info.payload_as_str().unwrap_or("panic occurred");
+
     if rfd::MessageDialog::new()
         .set_level(rfd::MessageLevel::Error)
         .set_title("Ruffle")