Failure to parse function pointer type typedef properly

[XVilka]

    FAILED: _rizin.cpython-38-x86_64-linux-gnu.so.p/meson-generated_.._rizin_wrap.cxx.o
    c++ -I_rizin.cpython-38-x86_64-linux-gnu.so.p -I. -I.. -I/opt/_internal/cpython-3.8.20/include/python3.8 -I/usr/local/include/librz -I/usr/local/include/librz/sdb -fdiagnostics-color=always -DNDEBUG -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -O3 -fPIC -MD -MQ _rizin.cpython-38-x86_64-linux-gnu.so.p/meson-generated_.._rizin_wrap.cxx.o -MF _rizin.cpython-38-x86_64-linux-gnu.so.p/meson-generated_.._rizin_wrap.cxx.o.d -o _rizin.cpython-38-x86_64-linux-gnu.so.p/meson-generated_.._rizin_wrap.cxx.o -c rizin_wrap.cxx
    rizin_wrap.cxx: In function 'PyObject* _wrap_RzBuffer_fwd_scan(PyObject*, PyObject*)':
    rizin_wrap.cxx:77903:31: error: invalid operands of types 'long long unsigned int' and 'std::nullptr_t' to binary 'operator!='
    77903 |   SWIG_contract_assert((result!=NULL), "Contract violation: require: (result!=NULL)");
          |                               ^
    rizin_wrap.cxx:3153:52: note: in definition of macro 'SWIG_contract_assert'
     3153 | #define SWIG_contract_assert(expr, msg) do { if (!(expr)) { SWIG_Error(SWIG_RuntimeError, msg); SWIG_fail; } } while (0)
          |                                                    ^~~~

If we check the function in question, it has this code:

typedef ut64 (*RzBufferFwdScan)(RZ_BORROW RZ_NONNULL const ut8 *buf, ut64 len, RZ_NULLABLE void *user);
RZ_API ut64 rz_buf_fwd_scan(RZ_NONNULL RzBuffer *b, ut64 start, ut64 amount, RZ_NONNULL RzBufferFwdScan fwd_scan, RZ_NULLABLE void *user);

/**
 * \brief Scans buffer linearly in chunks calling \p fwd_scan for each chunk.
 *
 * \param b RzBuffer to read
 * \param start Start address
 * \param amount Amount of bytes to read
 * \param fwd_scan Function to call for each chunk
 * \param user User data to pass to fwd_scan
 * \return Number of bytes read
 */
RZ_API ut64 rz_buf_fwd_scan(RZ_NONNULL RzBuffer *b, ut64 start, ut64 amount, RZ_NONNULL RzBufferFwdScan fwd_scan, RZ_NULLABLE void *user) {
	rz_return_val_if_fail(b && fwd_scan, 0);
	if (!amount) {
		return 0;
	}
       ...
}