"leaks - reading file sync" test fails on i386/1.30.1

[jamessan]

The Debian i386 build failed with the below test failure:

  1024	8609792
  2048	14700544
  3072	14700544
  4096	14700544
  5120	11386880
  6144	14532608
  7168	14532608
  8192	14761984
  { before = 8609792, after = 14761984 }
  ./tests/test-leaks.lua:24: assertion failed!
  stack traceback:
  	[C]: in function 'assert'
  	./tests/test-leaks.lua:24: in upvalue 'bench'
  	./tests/test-leaks.lua:102: in field 'fn'
  	./lib/tap.lua:53: in function <./lib/tap.lua:42>
  	[C]: in function 'xpcall'
  	./lib/tap.lua:42: in upvalue 'run'
  	./lib/tap.lua:136: in function 'lib/tap'
  	tests/run.lua:35: in main chunk
not ok 25 leaks - reading file sync

This was with the app shim (dynamically linked against luv) I've previously mentioned. The test passed when using lua to directly run the tests.