[UR][CUDA] precommit conformance test exp_usm_context_memcpy/urUSMContextMemcpyExp failing

[ianayl]

Describe the bug

Please see precommit testing for PR #19686: https://github.com/intel/llvm/actions/runs/16684666037/job/47231876973?pr=19686

Test that is failing:

FAIL: Unified Runtime Conformance :: exp_usm_context_memcpy//exp_usm_context_memcpy-test/0/12 (217 of 510)
******************** TEST 'Unified Runtime Conformance :: exp_usm_context_memcpy//exp_usm_context_memcpy-test/0/12' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:/__w/llvm/llvm/build/test/conformance/exp_usm_context_memcpy/exp_usm_context_memcpy-test-Unified Runtime Conformance-6079-0-12.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=12 GTEST_SHARD_INDEX=0 /__w/llvm/llvm/build/test/conformance/exp_usm_context_memcpy/exp_usm_context_memcpy-test
--

Script:
--
/__w/llvm/llvm/build/test/conformance/exp_usm_context_memcpy/exp_usm_context_memcpy-test --gtest_filter=urUSMContextMemcpyExpTestDevice.Success/UR_BACKEND_CUDA__NVIDIA_CUDA_BACKEND__NVIDIA_A2_ID0ID__e___6_______W______
--
/__w/llvm/llvm/unified-runtime/test/conformance/exp_usm_context_memcpy/urUSMContextMemcpyExp.cpp:49: Failure
Expected equality of these values:
  host_mem
    Which is: 0
  memset_src_value
    Which is: 42

/__w/llvm/llvm/unified-runtime/test/conformance/exp_usm_context_memcpy/urUSMContextMemcpyExp.cpp:49
Expected equality of these values:
  host_mem
    Which is: 0
  memset_src_value
    Which is: 42

To reproduce

No response

Environment

• OS: Linux CI environment
• Target device and vendor: NVIDIA GPU
• DPC++ version: reproducible since at least 824e751

Additional context

I have not yet tested on an actual machine yet; I will need to dig further, but admittedly this is not the highest priority for me.