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Fix lexical declaration check for let variables (#4529)

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JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2021-02-04 13:07:38 +01:00
committed by GitHub
parent a1b682a83d
commit 3bb67397a0
5 changed files with 204 additions and 18 deletions
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jerry-core/vm/vm.c
+12 -9
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@@ -1651,20 +1651,23 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
ecma_string_t *literal_name_p = ecma_get_string_from_value (literal_start_p[literal_index]);
ecma_object_t *lex_env_p = frame_ctx_p->lex_env_p;
ecma_property_t *binding_p = NULL;
if (lex_env_p->type_flags_refs & ECMA_OBJECT_FLAG_BLOCK)
{
binding_p = ecma_find_named_property (lex_env_p, literal_name_p);
result = opfunc_lexical_scope_has_restricted_binding (frame_ctx_p, literal_name_p);
JERRY_ASSERT (lex_env_p->u2.outer_reference_cp != JMEM_CP_NULL);
lex_env_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, lex_env_p->u2.outer_reference_cp);
}
if (!ecma_is_value_false (result))
{
if (ecma_is_value_true (result))
{
result = ecma_raise_syntax_error (ECMA_ERR_MSG ("Local variable is redeclared"));
}
if (binding_p != NULL)
{
result = ecma_raise_syntax_error (ECMA_ERR_MSG ("Local variable is redeclared"));
goto error;
JERRY_ASSERT (ECMA_IS_VALUE_ERROR (result));
goto error;
}
continue;
}
result = ecma_op_has_binding (lex_env_p, literal_name_p);