Fix GC_test#test_enable leaving GC disabled for the rest of the suite - #3059
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`GC.enable` returns whether GC was *disabled* before the call (true when the call actually re-enabled GC), not whether it was enabled. The ensure clause `GC.disable unless was_enabled` therefore inverted the restore: in the common case where GC is enabled when the test starts, GC.enable returns false and the ensure clause disables GC permanently. Every test that runs after GC_test then executes with GC turned off, so the whole stdlib test process accumulates garbage until exit. On the ruby/ruby Windows CI runners this reaches the process memory limit and the suite dies with NoMemoryError (deterministically), and on all platforms it silently changes what later tests exercise. Rename the variable to what the value actually means and restore the previous state with `GC.disable if was_disabled`, mirroring test_disable. Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
soutaro
approved these changes
Jul 31, 2026
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GC.enablereturns whether GC was disabled before the call (true when the call actually re-enabled GC), not whether it was enabled. The ensure clauseGC.disable unless was_enabledtherefore inverted the restore: in the common case where GC is enabled when the test starts, GC.enable returns false and the ensure clause disables GC permanently.Every test that runs after GC_test then executes with GC turned off, so the whole stdlib test process accumulates garbage until exit. On the ruby/ruby Windows CI runners this reaches the process memory limit and the suite dies with NoMemoryError (deterministically), and on all platforms it silently changes what later tests exercise.
Rename the variable to what the value actually means and restore the previous state with
GC.disable if was_disabled, mirroring test_disable.