- struct psi_decl_abi *abi = calloc(1, sizeof(*abi));
- abi->convention = zend_string_copy(convention);
+ struct psi_decl_abi *abi = pecalloc(1, sizeof(*abi), 1);
+ abi->convention = convention
+ ? zend_string_copy(convention)
+ : psi_string_init_interned(ZEND_STRL("default"), 1);