Avoid buffer->move_to() in case of buffer error
Fixes https://github.com/behdad/harfbuzz/issues/223 Right now we cannot test this because it has to be tested using hb-fuzzer. We should move all fuzzing tests from test/shaping/tests/fuzzed.tests to test/fuzzing/ and have its own test runner. At that point, should add test from this issue as well.
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@ -407,6 +407,8 @@ hb_buffer_t::move_to (unsigned int i)
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idx = i;
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return true;
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}
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if (unlikely (in_error))
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return false;
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assert (i <= out_len + (len - idx));
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@ -971,7 +971,7 @@ static inline bool apply_lookup (hb_apply_context_t *c,
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match_positions[j] += delta;
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}
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for (unsigned int i = 0; i < lookupCount; i++)
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for (unsigned int i = 0; i < lookupCount && !buffer->in_error; i++)
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{
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unsigned int idx = lookupRecord[i].sequenceIndex;
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if (idx >= count)
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