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f90ecfb1f7
This is a partial cherry-pick from Redis 7.2
## Fix various compilation warnings and errors
5) server.c
COMPILER: gcc-13 with FORTIFY_SOURCE
WARNING:
```
In function 'lookupCommandLogic',
inlined from 'lookupCommandBySdsLogic' at server.c:3139:32:
server.c:3102:66: error: '*(robj **)argv' may be used uninitialized [-Werror=maybe-uninitialized]
3102 | struct redisCommand *base_cmd = dictFetchValue(commands, argv[0]->ptr);
| ~~~~^~~
```
REASON: The compiler thinks that the `argc` returned by `sdssplitlen()` could be 0,
resulting in an empty array of size 0 being passed to lookupCommandLogic.
this should be a false positive, `argc` can't be 0 when strings are not NULL.
SOLUTION: add an assert to let the compiler know that `argc` is positive.
## Other changes
1) Fixed `ps -p [pid]` doesn't output `<defunct>` when using procps 4.x causing `replication
child dies when parent is killed - diskless` test to fail.
(cherry picked from commit 42c8c61813)