[Rubycocoa-talk] Crash at st_lookup when using NSNotifications

[Benjamin J. <bhj...@gm...>]

The segfaults are seemingly at random. They all end either at
search_method or at st_lookup, which is the part which checks the hash
table for selectors ot figure out which method to send the
notification to. We're calling them on the main thread with
performSelectorOnMainThread: so it's not a cross-thread issue. Is this
some object which is being hit by GC? We're calling GC.disable while
this code is running.

st_lookup(table, key, value)
    st_table *table;
    register st_data_t key;
    st_data_t *value;
{
    unsigned int hash_val, bin_pos;
    register st_table_entry *ptr;

    hash_val = do_hash(key, table); # CRASHES HERE!!!!!!!!!!
    FIND_ENTRY(table, ptr, hash_val, bin_pos);

    if (ptr == 0) {
	return 0;
    }
    else {
	if (value != 0)  *value = ptr->record;
	return 1;
    }
}


Exception:  EXC_BAD_ACCESS (0x0001)
Codes:      KERN_PROTECTION_FAILURE (0x0002) at 0x00000002

Thread 0 Crashed:
0   libruby.dylib             	0x0030a0ac st_lookup + 11 (st.c:250)
1   libruby.dylib             	0x002a0958 search_method + 56 (eval.c:494)
2   libruby.dylib             	0x002a09ba rb_get_method_body + 39 (eval.c:515)