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Skip the vector<bool> failed-allocation check for VS 2015 with iterator debugging

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AppVeyor's VS 2015 Debug build terminated in "converting into an
existing value": to_json for std::vector<bool> default-constructs an
array_t first, and VS 2015's std::vector default constructor is noexcept
but, with iterator debugging, constructs its proxy through the test's
allocator, which throws.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Niels Lohmann
2026-09-27 13:30:57 +02:00
parent e9c84befa1
commit fa28fff7d6
1 changed files with 5 additions and 0 deletions
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tests/src/unit-allocator.cpp
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@@ -487,9 +487,14 @@ TEST_CASE("a failed allocation leaves the value unchanged")
CHECK_THROWS_AS(nlohmann::to_json(j, std::vector<int> {1, 2}), std::bad_alloc&);
CHECK(j == "old");
// with iterator debugging, the default constructor of VS 2015's
// std::vector is noexcept but constructs a proxy with the allocator,
// which terminates when this allocator throws
#if !(defined(_MSC_VER) && _MSC_VER < 1910 && defined(_ITERATOR_DEBUG_LEVEL) && _ITERATOR_DEBUG_LEVEL > 0)
next_construct_fails = true;
CHECK_THROWS_AS(nlohmann::to_json(j, std::vector<bool> {true, false}), std::bad_alloc&);
CHECK(j == "old");
#endif
next_construct_fails = true;
CHECK_THROWS_AS(nlohmann::to_json(j, std::map<std::string, int> {{"a", 1}}), std::bad_alloc&);