Enabling features from [replace] or [patch] doesn't work #3034
Description
If I add a path replacement for an existing dependency in my Cargo.toml, then add a nonexistent feature to it (eg. "js:0.1.3" = {path = "../rust-mozjs", features = ["nonexistent_feature"]}, Cargo does not complain. This implies to me that it's also impossible to enable existing features, since I'm having trouble with that as well.