llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-aarch64-darwin` 
running on `doug-worker-4` while building `clang` at step 6 
"test-build-unified-tree-check-all".

Full details are available at: 
https://lab.llvm.org/buildbot/#/builders/190/builds/9516

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'Clang :: AST/HLSL/AppendStructuredBuffer-AST.hlsl' 
FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/clang 
-cc1 -internal-isystem 
/Users/buildbot/buildbot-root/aarch64-darwin/build/lib/clang/20/include 
-nostdsysteminc -triple dxil-pc-shadermodel6.0-library -x hlsl -ast-dump 
-DEMPTY 
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/AST/HLSL/AppendStructuredBuffer-AST.hlsl
 | /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/FileCheck 
-check-prefix=EMPTY 
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/AST/HLSL/AppendStructuredBuffer-AST.hlsl
+ /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/FileCheck 
-check-prefix=EMPTY 
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/AST/HLSL/AppendStructuredBuffer-AST.hlsl
+ /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/clang -cc1 
-internal-isystem 
/Users/buildbot/buildbot-root/aarch64-darwin/build/lib/clang/20/include 
-nostdsysteminc -triple dxil-pc-shadermodel6.0-library -x hlsl -ast-dump 
-DEMPTY 
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/AST/HLSL/AppendStructuredBuffer-AST.hlsl
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/AST/HLSL/AppendStructuredBuffer-AST.hlsl:15:16:
 error: EMPTY-NEXT: expected string not found in input
// EMPTY-NEXT: TemplateTypeParmDecl 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> 
<invalid sloc> class depth 0 index 0 element_type
               ^
<stdin>:39:98: note: scanning from here
| |-ClassTemplateDecl 0x133853fa0 <<invalid sloc>> <invalid sloc> implicit 
AppendStructuredBuffer
                                                                       
                          ^
<stdin>:40:7: note: possible intended match here
| | |-TemplateTypeParmDecl 0x133853f00 <<invalid sloc>> <invalid sloc> 
typename depth 0 index 0 element_type
      ^

Input file: <stdin>
Check file: 
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/AST/HLSL/AppendStructuredBuffer-AST.hlsl

-dump-input=help explains the following input dump.

Input was:
<<<<<<
           1: TranslationUnitDecl 0x13382c608 
<<invalid sloc>> <invalid sloc> 
           2: |-NamespaceDecl 0x13382cf28 <<invalid 
sloc>> <invalid sloc> implicit hlsl 
           3: | |-TypeAliasTemplateDecl 0x13382d280 
<<invalid sloc>> <invalid sloc> implicit vector 
           4: | | |-TemplateTypeParmDecl 0x13382cfb0 
<<invalid sloc>> <invalid sloc> class depth 0 index 0 element 
           5: | | | `-TemplateArgument type 'float' 

           6: | | | `-BuiltinType 0x13382c810 'float' 

           7: | | |-NonTypeTemplateParmDecl 
0x13382d0b0 <<invalid sloc>> <invalid sloc> 'int' depth 0 index 1 element_count 

           8: | | | `-TemplateArgument expr '4' 
           9: | | | `-IntegerLiteral 0x13382d108 
<<invalid sloc>> 'int' 4 
          10: | | `-TypeAliasDecl 0x13382d220 
<<invalid sloc>> <invalid sloc> implicit vector 'vector<element, 
element_count>' 
          11: | | `-DependentSizedExtVectorType 
0x13382d1d0 'vector<element, element_count>' dependent <invalid sloc> 
          12: | | |-TemplateTypeParmType 0x13382d030 
'element' dependent depth 0 index 0 
          13: | | | `-TemplateTypeParm 0x13382cfb0 
'element' 
          14: | | `-DeclRefExpr 0x13382d170 <<invalid 
sloc>> 'int' lvalue NonTypeTemplateParm 0x13382d0b0 'element_count' 'int' 
          15: | |-ClassTemplateDecl 0x1338521a8 
<<invalid sloc>> <invalid sloc> implicit RWBuffer 
          16: | | |-TemplateTypeParmDecl 0x13382d538 
<<invalid sloc>> <invalid sloc> typename depth 0 index 0 element_type 
          17: | | |-ConceptSpecializationExpr 
0x133852148 <<invalid sloc>> 'bool' Concept 0x13382d3f0 
'__is_typed_resource_element_compatible' 
          18: | | | 
|-ImplicitConceptSpecializationDecl 0x133852080 <<invalid sloc>> <invalid sloc> 

          19: | | | | `-TemplateArgument type 
'type-parameter-0-0' 
          20: | | | | `-TemplateTypeParmType 
0x133852050 'type-parameter-0-0' dependent depth 0 index 0 
          21: | | | | `-TemplateTypeParm 0x133852000 
'' 
          22: | | | `-TemplateArgument type 
'element_type':'type-parameter-0-0' 
          23: | | | `-TemplateTypeParmType 
0x13382d330 'element_type' dependent depth 0 index 0 
          24: | | | `-TemplateTypeParm 0x13382d2d8 
'element_type' 
          25: | | `-CXXRecordDecl 0x13382d438 
<<invalid sloc>> <invalid sloc> implicit <undeserialized declarations> class 
RWBuffer 
...

```

</details>

https://github.com/llvm/llvm-project/pull/112600
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