That's simply not true. There is no recovering from a failed assert. Go's recover() allows recovering from panics.
Further, it is considered good practice to recover from panics within library API boundaries, and return errors across the API instead. "The convention in the Go libraries is that even when a package uses panic internally, its external API still presents explicit error return values."[1]
Further, it is considered good practice to recover from panics within library API boundaries, and return errors across the API instead. "The convention in the Go libraries is that even when a package uses panic internally, its external API still presents explicit error return values."[1]
[1] https://blog.golang.org/defer-panic-and-recover