Loading 'A' lua module from 'B' lua module using package.cpath package.path - module

Question

Applying this example of module in HighResolutionTimer, enter link description here, I just encounter some issue attempting to call by B module the A minimalist module that use a HighResTimer.dll build under Msys2 with gcc.
I got the error:
And the corresponding text:
./TimerTest.lua default arch : x86 arch updated : x64 == testing require from TimerTest.lua default arch : x86 arch updated : x64
execution time: 150.9933ms == end testing require from TimerTest.lua
C:\msys64\mingw32\bin\lua.exe: ./TimerTest.lua:33: attempt to index a
boolean value (local 'foo') stack traceback:
./TimerTest.lua:33: in main chunk
[C]: in ?
You can see that a first call to the minimalist inner test HighRestimer.lua which add package.cpath the Timer.dll is working on and well outputing number of elapsed ms.
This is the code:
#!/mingw64/bin/lua
------------------------------------
---HighResTimer.lua by Cody Duncan
---Wraps the High Resolution Timer Functions in
--- HighResTimer.so
------------------------------------
--
--
-- code to make script compatible within or without vim
--
--
---- init_packages {{{
basebase = 'foobar/'
function init_packages()
base = basebase .. 'lua/packages/'
arch = 'x86'
print('default arch : ' .. arch)
arch = os.getenv('MSYSTEM_CARCH') == 'x86_64' and 'x64' or 'x86'
print('arch updated : ' .. arch)
--assuming that Timer.dll got distinguished name from lua module HighResTimer.lua
package.cpath = package.cpath .. ';' .. base .. 'HighResTimer/' .. arch .. '/?.dll'
end
init_packages()
---- }}}
local timer = require("Timer") --load up the module
timer.readHiResTimerFrequency()
---- api functions {{{
----call this before code that is being measured for execution time
function start()
timer.storeTime();
end
----call this after code that is being measured for execution time
function stop()
timer.storeTime();
end
----once the prior two functions have been called, call this to get the
----time elapsed between them in nanoseconds
function getNanosElapsed()
return timer.getNanoElapsed();
end
-- }}}
---- inner unit test {{{
----
function innertest()
start();
for i = 0, 3000000 do io.write("") end --do essentially nothing 3million times.
stop();
----divide nanoseconds by 1 million to get milliseconds
executionTime = getNanosElapsed()/1000000;
if inVim == true then
print("execution time: ", executionTime, "ms\n");
else
io.write("execution time: ", executionTime, "ms\n");
end
end
innertest()
-- }}}
-- vim: set ft=lua ff=dos fdm=marker ts=2 :expandtab:
This 'A' module execution works well, displaying some inner result test in milliseconds. The problem comes when i call this 'A' lua module from a 'B' lua module with this code:
#!/mingw32/bin/lua
------------------------------------
---TimerTest.lua by Cody Duncan
---
---HighResTimer.lua and Timer.so must
--- be in the same directory as
--- this script.
------------------------------------
--
---- init_packages {{{
basebase = 'foobar/'
function init_packages()
base = basebase .. 'lua/packages/'
arch = 'x86'
print('default arch : ' .. arch)
arch = os.getenv('MSYSTEM_CARCH') == 'x86_64' and 'x64' or 'x86'
print('arch updated : ' .. arch)
package.path = package.path .. ';' .. base .. 'HighResTimer/' .. arch .. '/?.lua'
end
init_packages()
---- }}}
print(' == testing require from TimerTest.lua')
require('HighResTimer')
print(' == end testing require from TimerTest.lua')
local foo = require("HighResTimer")
foo.start();
-- for i = 0, 3000000 do io.write("") end --do essentially nothing 3million times.
-- foo.stop();
--divide nanoseconds by 1 million to get milliseconds
-- executionTime = getNanosElapsed()/1000000;
-- io.write("execution time: ", executionTime, "ms\n");
-- vim: set ft=lua ff=dos fdm=marker ts=2 :expandtab:
The require 'A' Highrestimer.lua seems to not causing troubleshoot but the mine after local foo =... cause the error.
Notice that in 'A' module i use package.cpath in some particular way to load dll meanwhile i use package.path in the 'B' module TimerTest.lua.