[clang] [libclang] Always Dup in createRef(StringRef) (PR #125020)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-aarch64-linux-bootstrap-asan` running on `sanitizer-buildbot7` while building `clang` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/24/builds/5252

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

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 86445 tests, 72 workers --
Testing:  0.. 10
FAIL: Clang :: Index/USR/structural-value-tpl-arg.cpp (12308 of 86445)
******************** TEST 'Clang :: Index/USR/structural-value-tpl-arg.cpp' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/c-index-test -test-load-source-usrs local -std=c++20 -- /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/USR/structural-value-tpl-arg.cpp | /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/USR/structural-value-tpl-arg.cpp
+ /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/USR/structural-value-tpl-arg.cpp
+ /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/c-index-test -test-load-source-usrs local -std=c++20 -- /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/USR/structural-value-tpl-arg.cpp
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/USR/structural-value-tpl-arg.cpp

--

********************
Testing:  0.. 10
FAIL: Clang :: Index/annotate-attribute.cpp (12311 of 86445)
******************** TEST 'Clang :: Index/annotate-attribute.cpp' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/c-index-test -test-load-source all /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/annotate-attribute.cpp | /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/annotate-attribute.cpp
+ /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/annotate-attribute.cpp
+ /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/c-index-test -test-load-source all /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/annotate-attribute.cpp
/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/annotate-attribute.cpp:25:11: error: CHECK: expected string not found in input
// CHECK: ClassDecl=Test:3:7 (Definition) Extent=[3:1 - 17:2]
          ^
<stdin>:1:1: note: scanning from here
// CHECK: <invalid loc>:2:9: macro definition=__llvm__
^
<stdin>:1:30: note: possible intended match here
// CHECK: <invalid loc>:2:9: macro definition=__llvm__
                             ^

Input file: <stdin>
Check file: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/annotate-attribute.cpp

-dump-input=help explains the following input dump.
Step 11 (stage2/asan check) failure: stage2/asan check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 86445 tests, 72 workers --
Testing:  0.. 10
FAIL: Clang :: Index/USR/structural-value-tpl-arg.cpp (12308 of 86445)
******************** TEST 'Clang :: Index/USR/structural-value-tpl-arg.cpp' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/c-index-test -test-load-source-usrs local -std=c++20 -- /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/USR/structural-value-tpl-arg.cpp | /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/USR/structural-value-tpl-arg.cpp
+ /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/USR/structural-value-tpl-arg.cpp
+ /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/c-index-test -test-load-source-usrs local -std=c++20 -- /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/USR/structural-value-tpl-arg.cpp
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/USR/structural-value-tpl-arg.cpp

--

********************
Testing:  0.. 10
FAIL: Clang :: Index/annotate-attribute.cpp (12311 of 86445)
******************** TEST 'Clang :: Index/annotate-attribute.cpp' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/c-index-test -test-load-source all /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/annotate-attribute.cpp | /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/annotate-attribute.cpp
+ /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/annotate-attribute.cpp
+ /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/c-index-test -test-load-source all /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/annotate-attribute.cpp
/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/annotate-attribute.cpp:25:11: error: CHECK: expected string not found in input
// CHECK: ClassDecl=Test:3:7 (Definition) Extent=[3:1 - 17:2]
          ^
<stdin>:1:1: note: scanning from here
// CHECK: <invalid loc>:2:9: macro definition=__llvm__
^
<stdin>:1:30: note: possible intended match here
// CHECK: <invalid loc>:2:9: macro definition=__llvm__
                             ^

Input file: <stdin>
Check file: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/clang/test/Index/annotate-attribute.cpp

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

```

</details>

https://github.com/llvm/llvm-project/pull/125020