[parser] Add more tests for preparser variable tracking.

BUG=v8:5501

Review-Url: https://codereview.chromium.org/2661233002
Cr-Commit-Position: refs/heads/master@{#42819}

test/cctest/test-parsing.cc

@@ -8781,6 +8781,18 @@ TEST(NoPessimisticContextAllocation) {
       {"", "var {my_var : a} = {my_var};", true},
       {"", "let {my_var : a} = {my_var};", true},
       {"", "const {my_var : a} = {my_var};", true},
+      {"", "var [a, b = my_var] = [1, 2];", true},
+      {"", "var [a, b = my_var] = [1, 2]; my_var;", true},
+      {"", "let [a, b = my_var] = [1, 2];", true},
+      {"", "let [a, b = my_var] = [1, 2]; my_var;", true},
+      {"", "const [a, b = my_var] = [1, 2];", true},
+      {"", "const [a, b = my_var] = [1, 2]; my_var;", true},
+      {"", "var {a = my_var} = {}", true},
+      {"", "var {a: b = my_var} = {}", true},
+      {"", "let {a = my_var} = {}", true},
+      {"", "let {a: b = my_var} = {}", true},
+      {"", "const {a = my_var} = {}", true},
+      {"", "const {a: b = my_var} = {}", true},
       {"a = my_var", "", true},
       {"", "function inner2(a = my_var) { }", true},
       {"", "(a = my_var) => { }", true},