Fix compaction during ary_make_partial

The ary_make_shared call may allocate, which can trigger a GC
compaction. This can cause the array to be embedded because it has a
length of 0.

1 files changed, 9 insertions, 0 deletions

diff --git a/tool/lib/envutil.rb b/tool/lib/envutil.rb
index 1ca76d17a7..e47523a24b 100644
--- a/tool/lib/envutil.rb
+++ b/tool/lib/envutil.rb
@@ -245,6 +245,15 @@ module EnvUtil
   end
   module_function :under_gc_stress
 
+  def under_gc_compact_stress(&block)
+    auto_compact = GC.auto_compact
+    GC.auto_compact = true
+    under_gc_stress(&block)
+  ensure
+    GC.auto_compact = auto_compact
+  end
+  module_function :under_gc_compact_stress
+
   def with_default_external(enc)
     suppress_warning { Encoding.default_external = enc }
     yield