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Fix redeclaration of existing var variables in functions with argument context. (#3891)

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Fixes #3888

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2020-06-11 11:36:37 +02:00
committed by GitHub
parent 01e9670365
commit 38111c0889
3 changed files with 54 additions and 7 deletions
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jerry-core/vm/vm.c
+21 -7
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@@ -1421,17 +1421,31 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
JERRY_ASSERT (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE);
JERRY_ASSERT (prev_lex_env_p != NULL
&& ecma_get_lex_env_type (prev_lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE);
JERRY_ASSERT (ecma_find_named_property (prev_lex_env_p, name_p) == NULL);
ecma_property_t *property_p = ecma_find_named_property (prev_lex_env_p, name_p);
ecma_property_value_t *property_value_p;
property_value_p = ecma_create_named_data_property (prev_lex_env_p,
name_p,
ECMA_PROPERTY_CONFIGURABLE_WRITABLE,
NULL);
if (lit_value == ECMA_VALUE_UNDEFINED)
if (property_p == NULL)
{
continue;
property_value_p = ecma_create_named_data_property (prev_lex_env_p,
name_p,
ECMA_PROPERTY_CONFIGURABLE_WRITABLE,
NULL);
if (lit_value == ECMA_VALUE_UNDEFINED)
{
continue;
}
}
else
{
if (lit_value == ECMA_VALUE_UNDEFINED)
{
continue;
}
property_value_p = ECMA_PROPERTY_VALUE_PTR (property_p);
ecma_free_value_if_not_object (property_value_p->value);
}
property_value_p->value = lit_value;