I am just trying the basic example build, from the docs and getting this same error:

```sh
mkdir build
cd build
cmake ..
cmake --build .
```

Error:

```txt
/home/sly/Code/lwip/src/apps/snmp/snmp_traps.c:401:24: error: storing the address of local variable ‘snmp_v2_special_varbinds’ in ‘*varbinds.prev’ [-Werror=dangling-pointer=]
  401 |         varbinds->prev = &snmp_v2_special_varbinds[1];

```

So the question is, how do you use the app if it can't even build?  Surely there must be a way to build it, otherwise it is useless (how do you do releases).

Do we need to pass in a flag to ignore the warning or something?

(Or I did read some comments about the latest GCC now being stricter at checking this error, so maybe it didn't happen with earlier compilers. I am using GCC version 13.2.0)

When trying to build the fuzzer, I got this failure. Seems like it correctly detected where a pointer is given the address of a struct from the stack.

This has likely been broken since being added in patch #15072 in 2018.

../../src/apps/snmp/snmp_traps.c: In function ‘snmp_send_trap_or_notification_or_inform_generic’:
../../src/apps/snmp/snmp_traps.c:401:24: error: storing the address of local variable ‘snmp_v2_special_varbinds’ in ‘*varbinds.prev’ [-Werror=dangling-pointer=]
  401 |         varbinds->prev = &snmp_v2_special_varbinds[1];
      |         ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../src/apps/snmp/snmp_traps.c:356:23: note: ‘snmp_v2_special_varbinds’ declared here
  356 |   struct snmp_varbind snmp_v2_special_varbinds[] = {
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~
../../src/apps/snmp/snmp_traps.c:347:176: note: ‘varbinds’ declared here
  347 | snmp_send_trap_or_notification_or_inform_generic(struct snmp_msg_trap *trap_msg, const struct snmp_obj_id *eoid, s32_t generic_trap, s32_t specific_trap, struct snmp_varbind *varbinds)
      |                                                                                                                                                           ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
cc1: all warnings being treated as errors