Use realstd current thread static variables in tests#150131

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sardok wants to merge 2 commits intorust-lang:mainfrom

sardok:realstd_thread_variables

Commits on Dec 18, 2025

Use all thread::current static variables from realstd in tests.
Sinan Nalkaya
committed
Use re-exports from test_internals.
Sinan Nalkaya
committed