[njs] Fixed Array.prototype.length setter.

[Dmitry Volyntsev]

details:   http://hg.nginx.org/njs/rev/da303066654d
branches:  
changeset: 610:da303066654d
user:      Dmitry Volyntsev <xeioex at nginx.com>
date:      Wed Sep 19 19:24:05 2018 +0300
description:
Fixed Array.prototype.length setter.

diffstat:

 njs/njs_array.c          |  4 ++--
 njs/test/njs_unit_test.c |  6 ++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diffs (40 lines):

diff -r c989d199095a -r da303066654d njs/njs_array.c
--- a/njs/njs_array.c	Wed Sep 19 14:43:58 2018 +0300
+++ b/njs/njs_array.c	Wed Sep 19 19:24:05 2018 +0300
@@ -377,7 +377,7 @@ njs_array_prototype_length(njs_vm_t *vm,
     njs_value_t *setval, njs_value_t *retval)
 {
     double       num;
-    int32_t      size;
+    int64_t      size;
     uint32_t     length;
     njs_ret_t    ret;
     njs_value_t  *val;
@@ -399,7 +399,7 @@ njs_array_prototype_length(njs_vm_t *vm,
             return NJS_ERROR;
         }
 
-        size = (int32_t) (length - array->length);
+        size = (int64_t) length - array->length;
 
         if (size > 0) {
             ret = njs_array_expand(vm, array, 0, size);
diff -r c989d199095a -r da303066654d njs/test/njs_unit_test.c
--- a/njs/test/njs_unit_test.c	Wed Sep 19 14:43:58 2018 +0300
+++ b/njs/test/njs_unit_test.c	Wed Sep 19 19:24:05 2018 +0300
@@ -2790,9 +2790,15 @@ static njs_unit_test_t  njs_test[] =
     { nxt_string("[].length = {}"),
       nxt_string("RangeError: Invalid array length") },
 
+    { nxt_string("[].length = 2**32 - 1"),
+      nxt_string("MemoryError") },
+
     { nxt_string("[].length = 2**32"),
       nxt_string("RangeError: Invalid array length") },
 
+    { nxt_string("[].length = 2**32 + 1"),
+      nxt_string("RangeError: Invalid array length") },
+
     { nxt_string("[].length = -1"),
       nxt_string("RangeError: Invalid array length") },