LD_PRELOAD causes stack smashing error in gpg

[devnoname120]

For some reason gpg doesn’t seem to like when a RegEx is compiled in the constructor of a preloaded library. I haven’t seen this happen in other software, any ideas what could be causing this?

Minimum repo:

File `/tmp/repo.c`:

```c
#define _GNU_SOURCE
#include <regex.h>

__attribute__((constructor)) static void init(void) {
 regex_t regex;
 regcomp(&regex, "", 0);
}
```

Shell:

```sh
gcc -shared -fPIC -o /tmp/repro.so /tmp/repro.c
export LD_PRELOAD=/tmp/repro.so
gpg --list-keys
```

Output:

```
*** stack smashing detected ***: terminated
Aborted
```
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