False positive: Use of NULL or nullptr in sqlite3_open_v2

[Erik S]

The following code triggers a "Null pointer dereference" error:

#include <sqlite3.h>
#include <stddef.h>

void f(const char* filename, int flags) {
    sqlite3* handle;
    sqlite3_open_v2(filename, &handle, flags, NULL);
    sqlite3_close_v2(handle);
}

cppcheck 2.15.0 outputs:

$ cppcheck --library=sqlite3 ./test.c
Checking test.c ...
test.c:6:47: error: Null pointer dereference [nullPointer]
    sqlite3_open_v2(filename, &handle, flags, NULL);

Looking at the SQLite documentation, using NULL (or nullptr in C++) is allowed and has a special meaning:

If the fourth parameter is a NULL pointer then the default sqlite3_vfs object is used.

This probably originates from commit 76f1aac which first appeared in v2.15.0.

[CHR]

Have you considered opening a PR at https://github.com/danmar/cppcheck?

[CHR]

https://trac.cppcheck.net/ticket/13078