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Niels LohmannandClaude Opus 5.5
03d408aafa
* JSON_DIAGNOSTIC_POSITIONS: comparing a value-initialized iterator throws instead of crashing With JSON_DIAGNOSTIC_POSITIONS, comparing a value-initialized iterator (which has no container) with another iterator built the invalid_iterator.212 message from the byte positions of the iterator's value, which is a null pointer: UBSan reports "member call on null pointer" in exception::get_byte_positions(), then the process crashes. Every other configuration throws invalid_iterator.212. get_byte_positions() now returns no positions for a null value, as the JSON_DIAGNOSTICS path already does. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Declare the value-initialized iterator in the test const clang-tidy (misc-const-correctness) flags it, as it is only compared. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N5NasAgbDGG28MqXjQvLqp Signed-off-by: Claude <noreply@anthropic.com> --------- Signed-off-by: Niels Lohmann <mail@nlohmann.me> Signed-off-by: Claude <noreply@anthropic.com> Co-authored-by: Claude <noreply@anthropic.com>