lua: Fix isolate teardown segfault issue on macOS

Author: ingydotnet

Makefile

@@ -48,13 +48,6 @@ BUILD-DOC := $(BINDINGS:%=build-doc-%)
 INSTALL := $(INSTALL-DIRS:%=install-%)
 TEST := $(DIRS:%=test-%)
 TEST-BINDINGS := $(BINDINGS:%=test-%)
-
-# XXX - Lua has issues on macOS
-ifdef IS-MACOS
-TEST := $(filter-out test-lua,$(TEST))
-TEST-BINDINGS := $(filter-out test-lua,$(TEST-BINDINGS))
-endif
-
 PUBLISH := $(DIRS:%=publish-%)
 CLEAN := $(DIRS:%=clean-%)
 REALCLEAN := $(DIRS:%=realclean-%)

lua/lib/yamlscript.lua

@@ -176,14 +176,15 @@ function YAMLScript:load(input)
   return resp.data
 end
 
--- YAMLScript instance destructor
-function YAMLScript:__gc()
+-- Manual cleanup method for the isolate
+function YAMLScript:close()
   if self.isolatethread then
     -- Tear down the isolate thread to free resources
     local rc = libys.graal_tear_down_isolate(self.isolatethread)
     if rc ~= 0 then
       error("Failed to tear down isolate")
     end
+    self.isolatethread = nil
   end
 end