One day after we released AppCode 1.5.1 an update for Xcode appeared and broke LLDB in AppCode.
So, we are pushing AppCode 1.5.2, a hotfix release to restore LLDB support. A couple of other fixes also made it into this version.
Use ‘Check for updates’ from AppCode to install the update without re-downloading. Or download the new version from AppCode web site.