`[string "premake.bake = { }..."]:497: bad argument #1 to 'for iterator' (table expected, got nil)`

[KageKirin]

Hi, I'm getting the following error after upgrading to version 614 when creating projects for Xcode and VS2015. My previous version was 556 and I'm using the mac version.

Building configurations...
[string "premake.bake = { }..."]:497: bad argument #1 to 'for iterator' (table expected, got nil)
stack traceback:
    [C]: in for iterator 'for iterator'
    [string "premake.bake = { }..."]:497: in field 'postprocess'
    [string "premake.bake = { }..."]:443: in field 'buildconfigs'
    [string "_WORKING_DIR        = os.getcwd()..."]:67: in function '_premake_main'

Question: as the error cause might entirely reside in my luafiles, like some genie internals that worked by mistake and now have been fixed, is there a way to figure which setting or which file is causing this?

[bkaradzic]

Not sure. I just tested with bgfx and it works. You can build GENie in debug mode and if you set --scripts to point genie/src directory that call stack will be better.

[KageKirin]

Thanks. I managed to get a more detailed error stack:

genie/src/base/bake.lua:756: bad argument #1 to 'for iterator' (table expected, got nil)
stack traceback:
    [C]: in for iterator 'for iterator'
    ...e/badassX/scaffolding/thirdparty/genie/src/base/bake.lua:756: in field 'postprocess'
    ...e/badassX/scaffolding/thirdparty/genie/src/base/bake.lua:665: in field 'buildconfigs'
    ./thirdparty/genie/src/_premake_main.lua:138: in function '_premake_main'
make: *** [dev-xcode-debug] Error 1

Looking at the code (bake.lua:756), it says:

for _, fname in ipairs(cfg.allfiles) do

and in fact, the error is caused by one project of mine that had no call to files{} list, resulting in cfg.allfiles to be nil.

Following project (basically just a dummy to force recompilation of every project in the solution, pretty useful for rebuilding everything under Xcode):

group "__all"

local sln = solution()
local prjs = sln.projects
for i, prj in ipairs(prjs) do
end

project("__all_targets")
    kind("SharedLib")
    configuration {}
    files {} -- <-- this was missing and caused the error. adding it solved it.
    for _, prj in ipairs(prjs) do
        print("all targets: ", prj.name)        
        links{
            (prj.name)
        }
    end

[bkaradzic]

Probably there could be better error for missing files... :)