Improve compute shader validation error message (#3139)

* Improve compute shader validation error message

* Add entry to changelog.

* Improve error message wording (by cwfitzgerald)

Co-authored-by: Connor Fitzgerald <connorwadefitzgerald@gmail.com>

* Add credit and PR link to changelog

Co-authored-by: Connor Fitzgerald <connorwadefitzgerald@gmail.com>

CHANGELOG.md

@@ -34,7 +34,7 @@ Bottom level categories:
 - DX11
 - GLES
 - WebGPU
-- Enscripten
+- Emscripten
 - Hal
 -->
 
@@ -46,6 +46,7 @@ Bottom level categories:
 
 - Convert all `Default` Implementations on Enums to `derive(Default)`
 - Implement `Default` for `CompositeAlphaMode`
+- Improve compute shader validation error message. By @haraldreingruber in [#3139](https://github.com/gfx-rs/wgpu/pull/3139)
 
 #### WebGPU
 - Implement `queue_validate_write_buffer` by @jinleili in [#3098](https://github.com/gfx-rs/wgpu/pull/3098)

wgpu-core/src/validation.rs

@@ -236,10 +236,11 @@ pub enum StageError {
     #[error("shader module is invalid")]
     InvalidModule,
     #[error(
-        "shader entry point current workgroup size {current:?} must be less or equal to {limit:?} of total {total}"
+        "shader entry point's workgroup size {current:?} ({current_total} total invocations) must be less or equal to the per-dimension limit {limit:?} and the total invocation limit {total}"
     )]
     InvalidWorkgroupSize {
         current: [u32; 3],
+        current_total: u32,
         limit: [u32; 3],
         total: u32,
     },
@@ -1098,6 +1099,7 @@ impl Interface {
             {
                 return Err(StageError::InvalidWorkgroupSize {
                     current: entry_point.workgroup_size,
+                    current_total: total_invocations,
                     limit: max_workgroup_size_limits,
                     total: self.limits.max_compute_invocations_per_workgroup,
                 });