Yes. I upgraded to Catalina on the first day. ¯\_(ツ)_/¯

Now I’m trying to run a Python program and it’s exiting with Abort trap: 6. The crash report indicates the specific problem is with an OpenSSL dylib file…

Application Specific Information:
abort() called
Invalid dylib load. Clients should not load the unversioned libcrypto dylib as it does not have a stable ABI.

This may be a thing that gets worked out by an Xcode or Homebrew update, but until that time the simple fix is to symlink a couple files:

$ ln -s /usr/local/Cellar/openssl/1.0.2t/lib/libcrypto.1.0.0.dylib /usr/local/lib/libcrypto.dylib
$ ln -s /usr/local/Cellar/openssl/1.0.2t/lib/libssl.1.0.0.dylib /usr/local/lib/libssl.dylib

Obviously, I’m using the latest OpenSSL from Homebrew which you can ensure you have with:

$ brew install openssl

Carry on.