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9924aef690
First, ellipsize() and ellipsize_mem() should not read past the input buffer. Those functions take an explicit length for the input data, so they should not assume that the buffer is terminated by a nul. Second, ellipsization was off in various cases where wide on multi-byte characters were used. We had some basic test for ellipsize(), but apparently it wasn't enough to catch more serious cases. Should fix https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=8686.