| diff --git a/src/njs_vmcode.c b/src/njs_vmcode.c | |
| --- a/src/njs_vmcode.c | |
| +++ b/src/njs_vmcode.c | |
| static njs_jump_off_t | |
| njs_vmcode_function_copy(njs_vm_t *vm, njs_value_t *value, njs_index_t retidx) | |
| { | |
| njs_value_t *retval; | |
| njs_function_t *function; | |
| + njs_bool_t fncopy_dbg_invalid; | |
| + | |
| + fncopy_dbg_invalid = !njs_is_valid(njs_scope_value(vm, retidx)); | |
| retval = njs_scope_valid_value(vm, retidx); | |
| if (njs_is_undefined(retval)) { | |
| + if (njs_slow_path(!fncopy_dbg_invalid)) { | |
| + njs_stderror("FNCOPY-INVARIANT re-init of assigned binding\n"); | |
| + abort(); | |
| + } | |
| *retval = *value; | |