Gentoo's Bugzilla –
Attachment 560474 Details for
Bug 674920mail-client/geary-0.12.3 - .../work/geary-0.12.3/src/client/web-process/web-process-extension.vala:91.13-91.47: error: The name `get_javascript_global_context' does not exist in the context of `WebKit.Frame?'