Fix a potential data race on a global variable

version.go

@@ -5,16 +5,17 @@ import "runtime/debug"
 var v string
 
 func version() string {
-	if v == "" {
-		bi, ok := debug.ReadBuildInfo()
-		if ok {
-			v = bi.Main.Version
-		} else {
-			// if we can't read a go module version then they're using a git
-			// clone or vendored module so all we can do is report "dev" for
-			// the version
-			v = "dev"
-		}
-	}
 	return v
 }
+
+func init() {
+	bi, ok := debug.ReadBuildInfo()
+	if ok {
+		v = bi.Main.Version
+	} else {
+		// if we can't read a go module version then they're using a git
+		// clone or vendored module so all we can do is report "dev" for
+		// the version
+		v = "dev"
+	}
+}