From 8188b1d0abc2eba6497b5dc47f7e848cbacb7677 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Na=C3=AFm=20Favier?= <n@monade.li>
Date: Fri, 19 Aug 2022 00:59:04 +0200
Subject: [PATCH] json: write null on abnormal placeholder destruction

Avoids leaving dangling attributes like

    {
        "foo":
    }

in case of exceptions.
---
 src/libutil/json.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/libutil/json.cc b/src/libutil/json.cc
index abe0e6e74..2f9e97ff5 100644
--- a/src/libutil/json.cc
+++ b/src/libutil/json.cc
@@ -193,7 +193,11 @@ JSONObject JSONPlaceholder::object()
 
 JSONPlaceholder::~JSONPlaceholder()
 {
-    assert(!first || std::uncaught_exceptions());
+    if (first) {
+        assert(std::uncaught_exceptions());
+        if (state->stack != 0)
+            write(nullptr);
+    }
 }
 
 }