public void setExceptionalHaltReason(
      final Optional<ExceptionalHaltReason> exceptionalHaltReason) {
    this.exceptionalHaltReason = exceptionalHaltReason;
  }
Sets exceptional halt reason.

@param exceptionalHaltReason the exceptional halt reason
evm/src/main/java/org/hyperledger/besu/evm/frame/MessageFrame.java