Cannot use type [32]uint8 as type []uint8

[kamphaus]

typedef unsigned char pcre_uint8;
typedef struct pcre_study_data {
    pcre_uint8 start_bits[32];
} pcre_study_data;
// ...
pcre_study_data sdata;
sdata.start_bits[1] = 42;
const pcre_study_data *study = &sdata;
const pcre_uint8 *p = 0;
p = study->start_bits;
is_eq(*(p+1), 42);

gives the go build error cannot use study[0].start_bits (type [32]pcre_uint8) as type []pcre_uint8 in assignment