From b65dc74427864dee94ce58949efc140525410377 Mon Sep 17 00:00:00 2001
From: nickomodee <144nre2@gmail.com>
Date: Tue, 24 Jun 2025 03:12:46 +1200
Subject: [PATCH] Fix: incorrect list truncation in fast mode when comma is not
 followed by space

Fixes an edge case in `loads(..., ALL & ~STR, )` where an unterminated
string inside a list caused early truncation if commas were used without
a space after.
The issue was from an off by one error in the upper bound of `rfind()`
which excluded the last string element unless a space followed the
comma.

Before:
`loads('{"key": ["a", "b", "c","d', ALL & ~STR)` -> `{"key": ["a",
"b"]}`

After:
`loads('{"key": ["a", "b", "c", "d', ALL & ~STR)` -> `{"key": ["a", "b",
"c", "d"]}`

This change adjusts the search range in `rfind()` to correctly detect
the last comma, even when it is not followed by a whitespace.
---
 src/partial_json_parser/core/myelin.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/partial_json_parser/core/myelin.py b/src/partial_json_parser/core/myelin.py
index 963867c..69bcd82 100644
--- a/src/partial_json_parser/core/myelin.py
+++ b/src/partial_json_parser/core/myelin.py
@@ -120,7 +120,7 @@ def truncate_before_last_key_start(container_start: int, last_string_end: int, s
             # { "k
             return json_string[: stack[-1][0] + 1], join_closing_tokens(stack)
 
-        last_comma = json_string.rfind(",", max(stack[-1][0], last_string_end) + 1, last_string_start - 1)
+        last_comma = json_string.rfind(",", max(stack[-1][0], last_string_end) + 1, last_string_start)
         if last_comma != -1:
             # { "key": "v", "k
             # { "key": 123, "k