Bug in C code when <nodecl,noinit> used together

[stefanos82]

With the following code

require 'io'

local sts <nodecl,noinit>
do
  local sts = 1
  io.printf("inner local sts: %d\n", sts)
end
--io.printf("outer local sts: %d\n", sts)

I get an error in C code:

/home/stefanos/.cache/nelua/tmp.c: In function ‘nelua_GC_registerroots’:
/home/stefanos/.cache/nelua/tmp.c:1288:43: error: ‘tmp_sts’ undeclared (first use in this function)
 1288 |   nelua_GC_register((&nelua_gc), (void*)(&tmp_sts), 16U, 2U, (function_BQVUyrpMeDmmPHpu)NULL, (void*)NULL);
      |                                           ^~~~~~~
/home/stefanos/.cache/nelua/tmp.c:1288:43: note: each undeclared identifier is reported only once for each function it appears in
error: C compilation for '/home/stefanos/.cache/nelua/tmp' failed

shell returned 1

Press ENTER or type command to continue

[edubart]

This is not a bug, this is a misuse of nodecl annotation. When you use that annotation the compiler expects that the variable gets declared in the C file, but this was not the case, so you get a C compiler error. Usually you use nodecl with cimport and have the variable declared in some C header.

[stefanos82]

That's good to know; note taken. 👍