Add a separate pipeline constants error

wgpu-core/src/device/resource.rs

@@ -2745,6 +2745,9 @@ impl<A: HalApi> Device<A> {
             hal::PipelineError::EntryPoint(_stage) => {
                 pipeline::CreateComputePipelineError::Internal(ENTRYPOINT_FAILURE_ERROR.to_string())
             }
+            hal::PipelineError::PipelineConstants(_stages, msg) => {
+                pipeline::CreateComputePipelineError::PipelineConstants(msg)
+            }
         })?;
 
         let pipeline = pipeline::ComputePipeline {
@@ -3326,6 +3329,9 @@ impl<A: HalApi> Device<A> {
                     error: ENTRYPOINT_FAILURE_ERROR.to_string(),
                 }
             }
+            hal::PipelineError::PipelineConstants(stage, error) => {
+                pipeline::CreateRenderPipelineError::PipelineConstants { stage, error }
+            }
         })?;
 
         let pass_context = RenderPassContext {

wgpu-core/src/pipeline.rs

@@ -234,6 +234,8 @@ pub enum CreateComputePipelineError {
     Stage(#[from] validation::StageError),
     #[error("Internal error: {0}")]
     Internal(String),
+    #[error("Pipeline constant error: {0}")]
+    PipelineConstants(String),
     #[error(transparent)]
     MissingDownlevelFlags(#[from] MissingDownlevelFlags),
 }
@@ -525,6 +527,11 @@ pub enum CreateRenderPipelineError {
         stage: wgt::ShaderStages,
         error: String,
     },
+    #[error("Pipeline constant error in {stage:?} shader: {error}")]
+    PipelineConstants {
+        stage: wgt::ShaderStages,
+        error: String,
+    },
     #[error("In the provided shader, the type given for group {group} binding {binding} has a size of {size}. As the device does not support `DownlevelFlags::BUFFER_BINDINGS_NOT_16_BYTE_ALIGNED`, the type must have a size that is a multiple of 16 bytes.")]
     UnalignedShader { group: u32, binding: u32, size: u64 },
     #[error("Using the blend factor {factor:?} for render target {target} is not possible. Only the first render target may be used when dual-source blending.")]

wgpu-hal/src/dx12/device.rs

@@ -234,7 +234,7 @@ impl super::Device {
             &stage.module.naga.info,
             stage.constants,
         )
-        .map_err(|e| crate::PipelineError::Linkage(stage_bit, format!("HLSL: {e:?}")))?;
+        .map_err(|e| crate::PipelineError::PipelineConstants(stage_bit, format!("HLSL: {e:?}")))?;
 
         let needs_temp_options = stage.zero_initialize_workgroup_memory
             != layout.naga_options.zero_initialize_workgroup_memory;

wgpu-hal/src/gles/device.rs

@@ -223,7 +223,7 @@ impl super::Device {
         )
         .map_err(|e| {
             let msg = format!("{e}");
-            crate::PipelineError::Linkage(map_naga_stage(naga_stage), msg)
+            crate::PipelineError::PipelineConstants(map_naga_stage(naga_stage), msg)
         })?;
 
         let entry_point_index = module

wgpu-hal/src/lib.rs

@@ -321,6 +321,8 @@ pub enum PipelineError {
     EntryPoint(naga::ShaderStage),
     #[error(transparent)]
     Device(#[from] DeviceError),
+    #[error("Pipeline constant error for stage {0:?}: {1}")]
+    PipelineConstants(wgt::ShaderStages, String),
 }
 
 #[derive(Clone, Debug, Eq, PartialEq, Error)]

wgpu-hal/src/metal/device.rs

@@ -112,7 +112,7 @@ impl super::Device {
             &stage.module.naga.info,
             stage.constants,
         )
-        .map_err(|e| crate::PipelineError::Linkage(stage_bit, format!("MSL: {:?}", e)))?;
+        .map_err(|e| crate::PipelineError::PipelineConstants(stage_bit, format!("MSL: {:?}", e)))?;
 
         let ep_resources = &layout.per_stage_map[naga_stage];
 

wgpu-hal/src/vulkan/device.rs

@@ -764,7 +764,9 @@ impl super::Device {
                     &naga_shader.info,
                     stage.constants,
                 )
-                .map_err(|e| crate::PipelineError::Linkage(stage_flags, format!("{e}")))?;
+                .map_err(|e| {
+                    crate::PipelineError::PipelineConstants(stage_flags, format!("{e}"))
+                })?;
 
                 let spv = {
                     profiling::scope!("naga::spv::write_vec");