fixup! fix: reject fragment shader output locations > max_color_attachments limit

Author: ErichDonGubler

wgpu-core/src/validation.rs

@@ -313,11 +313,12 @@ pub enum StageError {
     MultipleEntryPointsFound,
     #[error(transparent)]
     InvalidResource(#[from] InvalidResourceError),
-    #[error(
-        "Location[{location}] {var}'s index exceeds `max_color_attachments` ({})",
-        hal::MAX_COLOR_ATTACHMENTS
-    )]
-    ColorAttachmentLocationExceedsLimit { location: u32, var: InterfaceVar },
+    #[error("Location[{location}] {var}'s index exceeds `max_color_attachments` ({limit})")]
+    ColorAttachmentLocationExceedsLimit {
+        location: u32,
+        var: InterfaceVar,
+        limit: u32,
+    },
 }
 
 impl WebGpuError for StageError {
@@ -1366,6 +1367,7 @@ impl Interface {
                         return Err(StageError::ColorAttachmentLocationExceedsLimit {
                             location,
                             var: iv.clone(),
+                            limit: self.limits.max_color_attachments,
                         });
                     }
                 }