From 5b4f1baef055d2a7be58cdfe7329b1b2f5b748c9 Mon Sep 17 00:00:00 2001
From: Marc-Andre Lafortune <github@marc-andre.ca>
Date: Tue, 30 Jun 2020 01:10:49 -0400
Subject: [PATCH] Fix pure parser with unclosed arrays / objects [Fix #314]

---
 lib/json/pure/parser.rb    | 8 ++++++--
 tests/fixtures/fail29.json | 1 +
 tests/fixtures/fail30.json | 1 +
 tests/fixtures/fail31.json | 1 +
 tests/fixtures/fail32.json | 1 +
 5 files changed, 10 insertions(+), 2 deletions(-)
 create mode 100644 tests/fixtures/fail29.json
 create mode 100644 tests/fixtures/fail30.json
 create mode 100644 tests/fixtures/fail31.json
 create mode 100644 tests/fixtures/fail32.json

diff --git a/lib/json/pure/parser.rb b/lib/json/pure/parser.rb
index 1c8f59f8..2bf93f09 100644
--- a/lib/json/pure/parser.rb
+++ b/lib/json/pure/parser.rb
@@ -242,8 +242,10 @@ def parse_array
           @max_nesting.nonzero? && @current_nesting > @max_nesting
         result = @array_class.new
         delim = false
-        until eos?
+        loop do
           case
+          when eos?
+            raise ParserError, "unexpected end of string while parsing array"
           when !UNPARSED.equal?(value = parse_value)
             delim = false
             result << value
@@ -274,8 +276,10 @@ def parse_object
           @max_nesting.nonzero? && @current_nesting > @max_nesting
         result = @object_class.new
         delim = false
-        until eos?
+        loop do
           case
+          when eos?
+            raise ParserError, "unexpected end of string while parsing object"
           when !UNPARSED.equal?(string = parse_string)
             skip(IGNORE)
             unless scan(PAIR_DELIMITER)
diff --git a/tests/fixtures/fail29.json b/tests/fixtures/fail29.json
new file mode 100644
index 00000000..98232c64
--- /dev/null
+++ b/tests/fixtures/fail29.json
@@ -0,0 +1 @@
+{
diff --git a/tests/fixtures/fail30.json b/tests/fixtures/fail30.json
new file mode 100644
index 00000000..558ed37d
--- /dev/null
+++ b/tests/fixtures/fail30.json
@@ -0,0 +1 @@
+[
diff --git a/tests/fixtures/fail31.json b/tests/fixtures/fail31.json
new file mode 100644
index 00000000..70773e47
--- /dev/null
+++ b/tests/fixtures/fail31.json
@@ -0,0 +1 @@
+[1, 2, 3,
diff --git a/tests/fixtures/fail32.json b/tests/fixtures/fail32.json
new file mode 100644
index 00000000..b18d550c
--- /dev/null
+++ b/tests/fixtures/fail32.json
@@ -0,0 +1 @@
+{"foo": "bar"