Fix flaky TestGc#test_heaps_grow_independently

peterzhu2118 · peterzhu2118 · commit f48d0ba93c69 · 2025-06-26T11:34:31.000-04:00
The test sometimes fails with "Expected 2062788 to be < 2000000" because heap 0 has not been cleared yet by GC. This commit fixes it to run GC before the assertion to ensure that it does not flake.
diff --git a/test/ruby/test_gc.rb b/test/ruby/test_gc.rb
@@ -701,6 +701,8 @@ def allocate_large_object = Array.new(10)
         allocate_large_object
       end
 
+      GC.start
+
       heap_available_slots = GC.stat(:heap_available_slots)
 
       assert_operator(heap_available_slots, :<, COUNT * 2, "GC.stat: #{GC.stat}\nGC.stat_heap: #{GC.stat_heap}")
