luacov problem with load()

[Totktonada]

It seems, the following code confuses luacov:

crud/crud/common/utils.lua

Line 116 in 5e8c91e

flatten_func = assert(load(code, '@flatten', 't', env))

$ .rocks/bin/luacov .
Couldn't open flatten: No such file or directory

See tarantool/luatest#190 for details.