llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-armv8-quick` running 
on `linaro-clang-armv8-quick` while building `clang` at step 5 "ninja check 1".

Full details are available at: 
https://lab.llvm.org/buildbot/#/builders/154/builds/25707

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

```
Step 5 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'Clang :: AST/ast-dump-APValue-addrlabeldiff.c' 
FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/clang -cc1 
-internal-isystem 
/home/tcwg-buildbot/worker/clang-armv8-quick/stage1/lib/clang/22/include 
-nostdsysteminc -std=c23 -ast-dump 
/home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ast-dump-APValue-addrlabeldiff.c
 -ast-dump-filter Test  | 
/home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/FileCheck 
--strict-whitespace --match-full-lines 
/home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ast-dump-APValue-addrlabeldiff.c
# executed command: 
/home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/clang -cc1 
-internal-isystem 
/home/tcwg-buildbot/worker/clang-armv8-quick/stage1/lib/clang/22/include 
-nostdsysteminc -std=c23 -ast-dump 
/home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ast-dump-APValue-addrlabeldiff.c
 -ast-dump-filter Test
# .---command stderr------------
# | 
/home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ast-dump-APValue-addrlabeldiff.c:15:23:
 error: constexpr variable 'ar' must be initialized by a constant expression
# |    15 |   constexpr long long ar = &&l2 - &&l1;
# |       |                       ^    ~~~~~~~~~~~
# | 1 error generated.
# `-----------------------------
# error: command failed with exit status: 1
# executed command: 
/home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/FileCheck 
--strict-whitespace --match-full-lines 
/home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ast-dump-APValue-addrlabeldiff.c
# .---command stderr------------
# | 
/home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ast-dump-APValue-addrlabeldiff.c:13:10:
 error: CHECK: expected string not found in input
# | // CHECK:  |   |-value: AddrLabelDiff &&l2 - &&l1
# |          ^
# | <stdin>:1:1: note: scanning from here
# | Dumping Test:
# | ^
# | <stdin>:2:88: note: possible intended match here
# | FunctionDecl 0xde666e8 
</home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ast-dump-APValue-addrlabeldiff.c:14:1,
 line:20:1> line:14:5 Test 'int (void)'
# |                                                                             
           ^
# | 
# | Input file: <stdin>
# | Check file: 
/home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ast-dump-APValue-addrlabeldiff.c
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             1: Dumping Test: 
# | check:13'0     X~~~~~~~~~~~~~ error: no match found
# |             2: FunctionDecl 0xde666e8 
</home/tcwg-buildbot/worker/clang-armv8-quick/llvm/clang/test/AST/ast-dump-APValue-addrlabeldiff.c:14:1,
 line:20:1> line:14:5 Test 'int (void)' 
# | check:13'0     
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | check:13'1                                                                  
                          ?                                                     
                           possible intended match
# |             3: `-CompoundStmt 0xde669a4 <col:16, line:20:1> 
# | check:13'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             4:   |-DeclStmt 0xde66900 <line:15:3, col:39> 
# | check:13'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             5:   | `-VarDecl 0xde667a0 <col:3, col:37> col:23 ar 'const 
long long' constexpr cinit 
# | check:13'0     
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             6:   |   `-ImplicitCastExpr 0xde668a8 <col:28, col:37> 'long 
long' <IntegralCast> 
# | check:13'0     
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             7:   |     `-BinaryOperator 0xde66890 <col:28, col:37> 
'__ptrdiff_t':'int' '-' 
# | check:13'0     
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             .
...

```

</details>

https://github.com/llvm/llvm-project/pull/171437
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