Re: gcc 13 warnings

On Thu, Mar 16, 2023 at 9:40 AM Pavel Stehule <pavel.stehule@gmail.com> wrote:
> [1700/2287] Compiling C object src/pl/plpgsql/src/plpgsql.so.p/pl_exec.c.o
> In file included from ../src/include/access/htup_details.h:22,
>                  from ../src/pl/plpgsql/src/pl_exec.c:21:
> In function ‘assign_simple_var’,
>     inlined from ‘exec_set_found’ at ../src/pl/plpgsql/src/pl_exec.c:8307:2:
> ../src/include/varatt.h:230:36: warning: array subscript 0 is outside array bounds of ‘char[0]’ [-Warray-bounds=]
>   230 |         (((varattrib_1b_e *) (PTR))->va_tag)
>       |                                    ^
> ../src/include/varatt.h:94:12: note: in definition of macro ‘VARTAG_IS_EXPANDED’
>    94 |         (((tag) & ~1) == VARTAG_EXPANDED_RO)
>       |            ^~~
> ../src/include/varatt.h:284:57: note: in expansion of macro ‘VARTAG_1B_E’
>   284 | #define VARTAG_EXTERNAL(PTR)                            VARTAG_1B_E(PTR)
>       |                                                         ^~~~~~~~~~~
> ../src/include/varatt.h:301:57: note: in expansion of macro ‘VARTAG_EXTERNAL’
>   301 |         (VARATT_IS_EXTERNAL(PTR) && !VARTAG_IS_EXPANDED(VARTAG_EXTERNAL(PTR)))
>       |                                                         ^~~~~~~~~~~~~~~
> ../src/pl/plpgsql/src/pl_exec.c:8495:17: note: in expansion of macro ‘VARATT_IS_EXTERNAL_NON_EXPANDED’
>  8495 |                 VARATT_IS_EXTERNAL_NON_EXPANDED(DatumGetPointer(newvalue)))
>       |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In function ‘exec_set_found’:
> cc1: note: source object is likely at address zero

I see these with gcc 12.2.0 also.