Fix luacov.tick

luacov.runner.init used package.loaded["luacov.tick"] to
determine whether it should save stats from time to time.
luacov.tick module used to set that field implicitly because
it called module().

In @8872071 (Oct 2012) module() call was removed, leaving luacov.tick broken.
Incidentally that always enabled on-exit gc hooks, so the problem was
not visible unless Lua somehow exited without calling them.

The fix is to use runner.tick field instead of package.loaded for
storing the flag.

3 files changed, 5 insertions, 3 deletions

diff --git a/src/luacov/runner.lua b/src/luacov/runner.lua
index 48d7ba7..23d96f0 100644
--- a/src/luacov/runner.lua
+++ b/src/luacov/runner.lua
@@ -476,7 +476,7 @@ end
 function runner.init(configuration)
    runner.configuration = runner.load_config(configuration)
    stats.statsfile = runner.configuration.statsfile
-   tick = package.loaded["luacov.tick"]
+   tick = runner.tick
    runner.resume()
 
    -- metatable trick on filehandle won't work if Lua exits through
diff --git a/src/luacov/tick.lua b/src/luacov/tick.lua
index dbb43c6..fdf2b2d 100644
--- a/src/luacov/tick.lua
+++ b/src/luacov/tick.lua
@@ -5,5 +5,7 @@
 -- @class module
 -- @name luacov.tick
 -- @see luacov.defaults.savestepsize
-require("luacov")
+local runner = require("luacov.runner")
+runner.tick = true
+runner.init()
 return {}
diff --git a/tests/nested/subdir/script.lua b/tests/nested/subdir/script.lua
index ef278a2..f69da5c 100644
--- a/tests/nested/subdir/script.lua
+++ b/tests/nested/subdir/script.lua
@@ -2,4 +2,4 @@ local testlib = require "testlib"
 testlib.f1()
 testlib.f2()
 testlib.f2()
-os.exit()
+osexit()