Fix runtime panics being suppressed

fatalLog was matching runtime errors, and essentially hiding them.

Test: m blueprint_tools
Change-Id: Ib48e7e142fc096998bc14b21fb717392adcff0ec

ui/logger/logger.go

@@ -73,7 +73,9 @@ type Logger interface {
 }
 
 // fatalLog is the type used when Fatal[f|ln]
-type fatalLog error
+type fatalLog struct {
+	error
+}
 
 func fileRotation(from, baseName, ext string, cur, max int) error {
 	newName := baseName + "." + strconv.Itoa(cur) + ext
@@ -273,7 +275,7 @@ func (s *stdLogger) Verboseln(v ...interface{}) {
 func (s *stdLogger) Fatal(v ...interface{}) {
 	output := fmt.Sprint(v...)
 	s.Output(2, output)
-	panic(fatalLog(errors.New(output)))
+	panic(fatalLog{errors.New(output)})
 }
 
 // Fatalf is equivalent to Printf() followed by a call to panic() that
@@ -281,7 +283,7 @@ func (s *stdLogger) Fatal(v ...interface{}) {
 func (s *stdLogger) Fatalf(format string, v ...interface{}) {
 	output := fmt.Sprintf(format, v...)
 	s.Output(2, output)
-	panic(fatalLog(errors.New(output)))
+	panic(fatalLog{errors.New(output)})
 }
 
 // Fatalln is equivalent to Println() followed by a call to panic() that
@@ -289,7 +291,7 @@ func (s *stdLogger) Fatalf(format string, v ...interface{}) {
 func (s *stdLogger) Fatalln(v ...interface{}) {
 	output := fmt.Sprintln(v...)
 	s.Output(2, output)
-	panic(fatalLog(errors.New(output)))
+	panic(fatalLog{errors.New(output)})
 }
 
 // Panic is equivalent to Print() followed by a call to panic().