syclcompat/warnings_deprecated.cpp failing in nightly #20218
Description
Describe the bug
FAIL: SYCL :: syclcompat/warnings_deprecated.cpp (866 of 903)
******************** TEST 'SYCL :: syclcompat/warnings_deprecated.cpp' FAILED ********************
Exit Code: 1
Command Output (stdout):
--
# RUN: at line 4
/__w/llvm/llvm/build/bin/clang --driver-mode=g++ -Xsycl-target-backend=amdgcn-amd-amdhsa --offload-arch=gfx90a -fsycl -fsyntax-only -Xclang -verify -Xclang -verify-ignore-unexpected=note,warning /__w/llvm/llvm/src/sycl/test/syclcompat/warnings_deprecated.cpp -Wall -Wextra
# executed command: /__w/llvm/llvm/build/bin/clang --driver-mode=g++ -Xsycl-target-backend=amdgcn-amd-amdhsa --offload-arch=gfx90a -fsycl -fsyntax-only -Xclang -verify -Xclang -verify-ignore-unexpected=note,warning /__w/llvm/llvm/src/sycl/test/syclcompat/warnings_deprecated.cpp -Wall -Wextra
# .---command stderr------------
# | clang: warning: argument unused during compilation: '-Xsycl-target-backend=amdgcn-amd-amdhsa --offload-arch=gfx90a' [-Wunused-command-line-argument]
# | error: 'expected-error' diagnostics seen but not expected:
# | File /__w/llvm/llvm/build/bin/../include/syclcompat/traits.hpp Line 129: no template named 'tuple_size_v' in namespace 'std'; did you mean 'tuple_size'?
# | File /__w/llvm/llvm/build/bin/../include/syclcompat/traits.hpp Line 129: expected '(' for function-style cast or type construction
# | File /__w/llvm/llvm/build/bin/../include/syclcompat/traits.hpp Line 160: no template named 'tuple_size_v' in namespace 'std'; did you mean 'tuple_size'?
# | File /__w/llvm/llvm/build/bin/../include/syclcompat/traits.hpp Line 159: use 'template' keyword to treat 'value' as a dependent template name
# | File /__w/llvm/llvm/build/bin/../include/syclcompat/traits.hpp Line 160: expected '>'
# | File /__w/llvm/llvm/src/sycl/test/syclcompat/warnings_deprecated.cpp Line 46: no viable constructor or deduction guide for deduction of template arguments of 'syclcompat::experimental::launch_policy'
# | 6 errors generated.
# `-----------------------------
# error: command failed with exit status: 1
https://github.com/intel/llvm/actions/runs/17995851108/job/51195110339
The first fail is in the nightly which ran on 9/25/25 at 3 AM GMT, and the nightly from the previous day which ran at 9/24/25 3AM GMT didn't have this failure, so that should bound the possible guilty commits, but I don't see one that's obviously guilty and I'm too busy to bisect.