fix(core): check query set index before other validation

Author: ErichDonGubler

CHANGELOG.md

@@ -40,6 +40,12 @@ Bottom level categories:
 
 ## Unreleased
 
+### Bug Fixes
+
+#### General
+
+- Emit a validation error instead of panicking when a query set index is OOB. By @ErichDonGubler in [#7908](https://github.com/gfx-rs/wgpu/pull/7908).
+
 ## v26.0.0 (2025-07-09)
 
 ### Major Features

cts_runner/test.lst

@@ -47,6 +47,7 @@ webgpu:api,validation,encoding,programmable,pipeline_bind_group_compat:bind_grou
 webgpu:api,validation,encoding,programmable,pipeline_bind_group_compat:bind_groups_and_pipeline_layout_mismatch:encoderType="render%20pass";*
 webgpu:api,validation,encoding,programmable,pipeline_bind_group_compat:buffer_binding,render_pipeline:*
 webgpu:api,validation,encoding,programmable,pipeline_bind_group_compat:sampler_binding,render_pipeline:*
+webgpu:api,validation,encoding,queries,general:occlusion_query,query_index:*
 webgpu:api,validation,image_copy,layout_related:copy_end_overflows_u64:*
 webgpu:api,validation,image_copy,texture_related:format:dimension="1d";*
 webgpu:api,validation,queue,submit:command_buffer,device_mismatch:*

wgpu-core/src/command/query.rs

@@ -210,6 +210,14 @@ impl QuerySet {
         query_index: u32,
         reset_state: Option<&mut QueryResetMap>,
     ) -> Result<(), QueryUseError> {
+        // NOTE: Further code assumes the index is good, so do this first.
+        if query_index >= self.desc.count {
+            return Err(QueryUseError::OutOfBounds {
+                query_index,
+                query_set_size: self.desc.count,
+            });
+        }
+
         // We need to defer our resets because we are in a renderpass,
         // add the usage to the reset map.
         if let Some(reset) = reset_state {
@@ -227,13 +235,6 @@ impl QuerySet {
             });
         }
 
-        if query_index >= self.desc.count {
-            return Err(QueryUseError::OutOfBounds {
-                query_index,
-                query_set_size: self.desc.count,
-            });
-        }
-
         Ok(())
     }