5.19 - Out of Memory error when connecting with public key

I connect to my site via SFTP. When I updated to 5.19 this morning and tried to connect I got this error:

Out of Memory
Authentication log (see session log for details):
Using username "fakeusername".
Authenticating with public key "fakekey".

Authentication failed.

I uninstalled WinSCP 5.19 and installed WinSCP 5.17. 5.17 worked like a charm and connected to my server.

Thanks for your report.

This issue is being tracked already:
https://winscp.net/tracker/1998

Meanwhile, just add the trailing newline to your key file.