BUG #16823: Unreachable code

The following bug has been logged on the website:

Bug reference: 16823
Logged by: Rupert
Email address: ruga(at)protonmail(dot)com
PostgreSQL version: 13.1
Operating system: openbsd
Description:

localtime.c:135:40: warning: code will never be executed
[-Wunreachable-code]
result -= !TWOS_COMPLEMENT(int32) && result != 0;
^~~~~~
localtime.c:161:40: warning: code will never be executed
[-Wunreachable-code]
result -= !TWOS_COMPLEMENT(int64) && result != 0;
^~~~~~
localtime.c:299:52: warning: code will never be executed
[-Wunreachable-code]
= ((TYPE_SIGNED(pg_time_t) ? at < TIME_T_MIN
: at < 0)

^~
localtime.c:1564:58: warning: code will never be executed
[-Wunreachable-code]
? (TYPE_SIGNED(pg_time_t) ? TIME_T_MIN - j <= *tp : -1 - j
< *tp)
^
4 warnings generated.
bootparse.c:2132:14: warning: code will never be executed
[-Wunreachable-code]
yyresult = 2;
^
1 warning generated.
bootstrap.c:465:4: warning: code will never be executed
[-Wunreachable-code]
proc_exit(1); /* should never return */
^~~~~~~~~
bootstrap.c:460:4: warning: code will never be executed
[-Wunreachable-code]
proc_exit(1); /* should never return */
^~~~~~~~~
bootstrap.c:454:4: warning: code will never be executed
[-Wunreachable-code]
proc_exit(1); /* should never return */
^~~~~~~~~
bootstrap.c:449:4: warning: code will never be executed
[-Wunreachable-code]
proc_exit(1); /* should never return */
^~~~~~~~~
bootstrap.c:444:4: warning: code will never be executed
[-Wunreachable-code]
proc_exit(1); /* should never return */
^~~~~~~~~
5 warnings generated.
main.c:211:2: warning: code will never be executed [-Wunreachable-code]
abort(); /* should not get
here */
^~~~~
1 warning generated.
heapam.c:5364:11: warning: code will never be executed
[-Wunreachable-code]
result = TM_Ok;
^~~~~
1 warning generated.
postmaster.c:1419:2: warning: code will never be executed
[-Wunreachable-code]
abort(); /* not reached */
^~~~~
postmaster.c:5513:3: warning: code will never be executed
[-Wunreachable-code]
ExitPostmaster(0);
^~~~~~~~~~~~~~
postmaster.c:5892:4: warning: code will never be executed
[-Wunreachable-code]
exit(1); /* should not get
here */
^~~~
3 warnings generated.
repl_gram.c:1942:14: warning: code will never be executed
[-Wunreachable-code]
yyresult = 2;
^
1 warning generated.
scan.c:6678:13: warning: code will never be executed [-Wunreachable-code]
if ( !
yyg->yy_did_buffer_switch_on_eof )
^~~
walsender.c:368:2: warning: code will never be executed
[-Wunreachable-code]
abort(); /* keep the compiler
quiet */
^~~~~
1 warning generated.
1 warning generated.
ri_triggers.c:1554:3: warning: code will never be executed
[-Wunreachable-code]
ExecDropSingleTupleTableSlot(slot);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
fe-connect.c:1112:16: warning: code will never be executed
[-Wunreachable-code]
ch->host = strdup(DefaultHost);
^~~~~~
1 warning generated.
pgc.c:3825:14: warning: code will never be executed [-Wunreachable-code]
if ( ! (yy_did_buffer_switch_on_eof)
)

^~~~~~~~~~~~~~~~~~~~~~~~~~~
variable.c:472:4: warning: code will never be executed
[-Wunreachable-code]
struct ECPGstruct_member *p;
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
data.c:372:6: warning: code will never be executed [-Wunreachable-code]
long res;
^~~~~~~~~~~~~~~~~~~~
execute.c:567:5: warning: code will never be executed [-Wunreachable-code]
int element;
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
1 warning generated.
1 warning generated.
psqlscan.c:3387:13: warning: code will never be executed
[-Wunreachable-code]
if ( !
yyg->yy_did_buffer_switch_on_eof )
^~~
1 warning generated.
localtime.c:135:40: warning: code will never be executed
[-Wunreachable-code]
result -= !TWOS_COMPLEMENT(int32) && result != 0;
^~~~~~
localtime.c:161:40: warning: code will never be executed
[-Wunreachable-code]
result -= !TWOS_COMPLEMENT(int64) && result != 0;
^~~~~~
localtime.c:299:52: warning: code will never be executed
[-Wunreachable-code]
= ((TYPE_SIGNED(pg_time_t) ? at < TIME_T_MIN
: at < 0)

^~
localtime.c:1564:58: warning: code will never be executed
[-Wunreachable-code]
? (TYPE_SIGNED(pg_time_t) ? TIME_T_MIN - j <= *tp : -1 - j
< *tp)
^
4 warnings generated.
file.c:355:2: warning: code will never be executed [-Wunreachable-code]
unlink(new_link_file);
^~~~~~
1 warning generated.
exprparse.c:1869:14: warning: code will never be executed
[-Wunreachable-code]
yyresult = 2;
^
1 warning generated.
psqlscanslash.c:2105:13: warning: code will never be executed
[-Wunreachable-code]
if ( !
yyg->yy_did_buffer_switch_on_eof )
^~~
1 warning generated.
pl_gram.c:4924:14: warning: code will never be executed
[-Wunreachable-code]
yyresult = 2;
^
1 warning generated.