Buggy setCompSpeedInternal

ComptrollerExcerpt.sol

/**
 * @notice Set COMP speed for a single market
 * @param cToken The market whose COMP speed to update
 * @param compSpeed New COMP speed for market
 */
function setCompSpeedInternal(CToken cToken, uint compSpeed) internal {
    uint currentCompSpeed = compSpeeds[address(cToken)];
    if (currentCompSpeed != 0) {
        // note that COMP speed could be set to 0 to halt liquidity rewards for a market
        Exp memory borrowIndex = Exp({mantissa: cToken.borrowIndex()});
        updateCompSupplyIndex(address(cToken));
        updateCompBorrowIndex(address(cToken), borrowIndex);
    } else if (compSpeed != 0) {
        // Add the COMP market
        Market storage market = markets[address(cToken)];
        require(market.isListed == true, "comp market is not listed");

        if (compSupplyState[address(cToken)].index == 0 && compSupplyState[address(cToken)].block == 0) {
            compSupplyState[address(cToken)] = CompMarketState({
                index: compInitialIndex,
                block: safe32(getBlockNumber(), "block number exceeds 32 bits")
            });
        }

        if (compBorrowState[address(cToken)].index == 0 && compBorrowState[address(cToken)].block == 0) {
            compBorrowState[address(cToken)] = CompMarketState({
                index: compInitialIndex,
                block: safe32(getBlockNumber(), "block number exceeds 32 bits")
            });
        }
    }

    if (currentCompSpeed != compSpeed) {
        compSpeeds[address(cToken)] = compSpeed;
        emit CompSpeedUpdated(cToken, compSpeed);
    }
}