vinyl/gh.test.lua does not check whether fibers are finished

[Totktonada]

The test case was added in tarantool/tarantool@e576ca9

And became broken in tarantool/tarantool@42c64d0:

-while finished ~= 2 do fiber.sleep(0.01) end
+test_run:wait_cond(function() return finished ~= 2 end)

The condition was not reverted.

[Totktonada]

I looked at the test, because I found the following line in logs:

2021-03-26 17:35:21.482 [23345] main/132/lua utils.c:1014 E> LuajitError: [string "_ = fiber.create(function() while cont do..."]:1: variable 'cont' is not declared

Despite the error the test passes.

(But I don't know why this situation occurs. The variable is declared before reading.)

I'm on Linux, tarantool is built in Debug mode.

[avtikhon]

I looked at the test, because I found the following line in logs:

2021-03-26 17:35:21.482 [23345] main/132/lua utils.c:1014 E> LuajitError: [string "_ = fiber.create(function() while cont do..."]:1: variable 'cont' is not declared

Despite the error the test passes.

(But I don't know why this situation occurs. The variable is declared before reading.)

I'm on Linux, tarantool is built in Debug mode.

Moved to separate issue to be able to close this one:
#131