Function reset_stdlib_state 

pub fn reset_stdlib_state()

Reset thread-local stdlib state. Call between test runs.

Note: long_running::reset_state() is intentionally NOT called here because that store is process-global, not thread-local. Wiping it from a per-test reset hook lets one test cancel another test’s in-flight worker thread (and lose its push_pending_feedback_global notification), which surfaces as walk_dir_long_running / glob_long_running timing out under parallel test load. The two call sites that genuinely need a clean handle store — stdlib::fs::tests::{walk_dir_long_running,glob_long_running} — call long_running::reset_state() explicitly while holding LONG_RUNNING_TEST_LOCK.