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fix issue 44108 #3033

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Jan 27, 2022
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fix issue 44108 #3033

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5 changes: 4 additions & 1 deletion lib/compress/zstd_compress.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3443,8 +3443,11 @@ ZSTD_resolveRepcodeToRawOffset(const U32 rep[ZSTD_REP_NUM], const U32 offBase, c
if (adjustedRepCode == ZSTD_REP_NUM) {
/* litlength == 0 and offCode == 2 implies selection of first repcode - 1
* This is only valid if it results in a valid offset value, aka > 0.
* Note : it may happen that `rep[0]==1` in exceptional circumstances.
* In which case this function will return 0, which is an invalid offset.
* It's not an issue though, since this value will be
* compared and discarded within ZSTD_seqStore_resolveOffCodes().
*/
assert(rep[0] > 1);
return rep[0] - 1;
}
return rep[adjustedRepCode];
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