If a glyph has a metric key with the name of another glyph, and the second one is being renamed, the metric key turns blue to indicate the error.
However, this error will not be detected by the filter “Metric keys out of sync.”
Is there another way to locate these errors?
If not, this would be a feature request.
It would actually be nice if the metric key could be an alias for the name of the first glyph instead of a string. This way, errors could be prevented altogether.