[SYCL] Fix segfault on program exit when user thread is not finished yet - #7908

[SYCL] Fix segfault on program exit when user thread is not finished yet#7908

bader merged 10 commits into

intel:syclintel/llvm:syclfrom

KseniyaTikhomirova:buffer_regressionKseniyaTikhomirova/llvm:buffer_regressionCopy head branch name to clipboard