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Sam Blackshear 3e6e76a2b2 [quandary] fix widening bug ... Summary: The previous widening operator added stars to the *end* of paths that existed in `next` but not `prev`. This is not enough to ensure termination in the case where the trie is growing both deeper and wider at the same time. The newly added test demonstrates this issue. In the code, there's an ever-growing path of the form `tmp.prev.next.prev.next...` that wasn't summarized by the previous widening operator. The new widening is much more aggressive: it replaces *any* node present in `next` but not `prev` with a `*` (rather than trying to tack a star onto the end). This fixes the issue. This issue was causing divergence on tricky doubly-linked list code in prod. Reviewed By: jeremydubreil Differential Revision: D5665719 fbshipit-source-id: 1310a92		7 years ago
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bufferoverrun	[inferbo] Remove temporary logical variables	7 years ago
errors	Do not show internal SIL variable name in the error message of temporary address escape	7 years ago
frontend	[C++] Rewrite initListExpr_trans	7 years ago
liveness	[checkers] add --<checker>-only options	7 years ago
quandary	[quandary] fix widening bug	7 years ago
shared	[C++] update fcp to deal with template specializations	7 years ago
siof	[infer] merge --failures-allowed and --keep-going	7 years ago
threadsafety	[ThreadSafety] Treating lock_guard destructor as Unlock.	7 years ago