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Throw out_of_range.411 for JSON Patch add into a null parent (#5917) (#5918)

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Claude-Session: https://claude.ai/code/session_01MKJf48vnGtTE25KscmjfaW

Signed-off-by: Niels Lohmann <niels.lohmann@gmail.com>
Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>
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Niels LohmannandClaude Sonnet 5.5 authored and GitHub committed 2026-10-26 17:11:25 +01:00
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commit d6431a9104
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tests/src/unit-json_patch.cpp
+18
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@@ -1515,6 +1515,24 @@ TEST_CASE("JSON patch - add to a primitive parent (regression #4292)")
#endif
}
SECTION("null parent")
{
json const doc = {{"foo", nullptr}};
json const patch = {{{"op", "add"}, {"path", "/foo/bar"}, {"value", 1}}};
#if JSON_DIAGNOSTICS
CHECK_THROWS_WITH_AS(doc.patch(patch), "[json.exception.out_of_range.411] (/foo) cannot add value: the JSON Patch 'add' target's parent is of type null, but must be an object or array", json::out_of_range&);
#else
CHECK_THROWS_WITH_AS(doc.patch(patch), "[json.exception.out_of_range.411] cannot add value: the JSON Patch 'add' target's parent is of type null, but must be an object or array", json::out_of_range&);
#endif
}
SECTION("null document")
{
json const doc = nullptr;
json const patch = {{{"op", "add"}, {"path", "/-"}, {"value", 1}}};
CHECK_THROWS_WITH_AS(doc.patch(patch), "[json.exception.out_of_range.411] cannot add value: the JSON Patch 'add' target's parent is of type null, but must be an object or array", json::out_of_range&);
}
SECTION("number parent")
{
json const doc = {{"foo", 1}};