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Previously it was possible to cause a 64bit signed to 32bit unsigned overflow. `from_stretcher` is pframes_t aka. uint32_t. With int64_t arguments a std::min() expression producing negative result will result in large 32bit values: (pframes_t) std::min<int64_t>(1024, 176400 - 187392) = 4294956304 This produced a segfault when used as n_samples to copy in buf.accumulate_from()
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