cmd/link: too many error messages when missing func main #10978
Description
With tip:
$ echo "package main" > m.go
$ go build m.go
# command-line-arguments
runtime.main: call to external function main.main
runtime.main: main.main: not defined
runtime.main: undefined: main.mainWith 1.4, there were at least only two; the "call to external function" didn't show up. One would be enough, maybe even one that addresses this fairly special situation head on.
Low priority.