error code: -26 error message: 16: mandatory-script-verify-flag-failed (Signature is found in scriptCode) I am building a simple p2pkh transaction using libbitcoin. Trying to pass it through my regtest node. I am getting the following error message.

error code: -26
error message:
16: mandatory-script-verify-flag-failed (Signature is found in scriptCode)


my transaction hash is as below:

01000000018df8ae6050992976497b63349c281bd05666842a6a82d6d8b26dc51812d58201000000006b483045022100c4befe583a3bc22eeaf1516c6d26fb3e1240bdfdf25db266494d82c77ccb36100220108ad79c4a34115eec23f5b0202d492dd88ec637df17a1982d4a63382e457599012102a018e21c743a4b67dcf38f9b693e807b1fbb833dfe705aa513abbf177b04adc2ffffffff01c0a6b9290100000017a91450628702abb40cc5fee219b9c834f4126c4198848700000000


Can anyone suggest what is happening here?? 

Please let me know if more information is required to understand the problem. 

Thank you.
Even though this question is a bit old by now, it might be useful to add a couple of things for future readers who might encounter the same Signature is found in scriptCode error.

First, the error appears when the policy change introduced in commit 9dabfe49c0 is triggered.  Specifically, the error will fire when FindAndDelete() detects the signature being passed to a CHECK(MULTI)SIG(VERIFY) operation to exist in the scriptCode itself.
This will never (actually, with neglible probability) happen when a simple p2pkh script is being redeemed.

Secondly, the spending transaction and signature in the original question is in fact valid :

printf '%s\n' 01000000018df8ae6050992976497b63349c281bd05666842a6a82d6d8b26dc51812d58201000000006B483045022100c4befe583a3bc22eeaf1516c6d26fb3e1240bdfdf25db266494d82c77ccb36100220108ad79c4a34115eec23f5b0202d492dd88ec637df17a1982d4a63382e457599012102a018e21c743a4b67dcf38f9b693e807b1fbb833dfe705aa513abbf177b04adc2ffffffff01c0a6b9290100000017a91450628702abb40cc5fee219b9c834f4126c4198848700000000 '[{"txid":"0182D51218C56DB2D8D6826A2A846656D01B289C34637B497629995060AEF88D","vout":0,"scriptPubKey":"76A914E08E0B7AF54A0A5B4CA39ECC5430AB2730ECC2A188AC"}]' | regtest-cli -stdin signrawtransactionwithwallet 
{
  "hex": "01000000018df8ae6050992976497b63349c281bd05666842a6a82d6d8b26dc51812d58201000000006b483045022100c4befe583a3bc22eeaf1516c6d26fb3e1240bdfdf25db266494d82c77ccb36100220108ad79c4a34115eec23f5b0202d492dd88ec637df17a1982d4a63382e457599012102a018e21c743a4b67dcf38f9b693e807b1fbb833dfe705aa513abbf177b04adc2ffffffff01c0a6b9290100000017a91450628702abb40cc5fee219b9c834f4126c4198848700000000",
  "complete": true
}