[lua] Sys.environment segfault

[Aurel300]

class Main {
  public static function main():Void {
    trace("getEnv", Sys.getEnv("HAXE_TEST"));
    trace("environment", Sys.environment()["HAXE_TEST"]);
    Sys.putEnv("HAXE_TEST", "maňana");
    trace("getEnv", Sys.getEnv("HAXE_TEST"));
    trace("environment", Sys.environment()["HAXE_TEST"]);
  }
}

$ haxe --main Main --lua tests.lua
$ lua tests.lua
src/Main.hx:3: getEnv, null
src/Main.hx:4: environment, null
src/Main.hx:6: getEnv, maňana
src/Main.hx:7: environment, maňana
[1]    18111 segmentation fault  lua tests.lua

It seems the segfault only happens due to the environment call.

Once fixed:

• re-enable the tests marked with this issue number in tests/sys/src/TestUnicode.hx

[RealyUniqueName]

Which lua version?
Here is what I get with 5.3 (still should not happen):

src/Main.hx:3: getEnv, null
src/Main.hx:4: environment, null
src/Main.hx:6: getEnv, maňana
src/Main.hx:7: environment, maňana
Uncaught Error: attempt to call a nil value
stack traceback:
        [C]: in ?
Uncaught Error: attempt to call a number value
stack traceback:
        [C]: in ?
lua: /tmp/luarocks_luarocks-source-luv-1.22.0-1-ct4yTr/luv-1.22.0-1/deps/libuv/src/unix/core.c:280: uv__finish_close: Assertion `0' failed.

[Aurel300]

This was on 5.3.5 for me.