fix: data race

Signed-off-by: francois  samin <[email protected]>

log.go

@@ -13,12 +13,6 @@ func RegisterField(fields ...Field) {
 	registeredFieldsMutex.Lock()
 	defer registeredFieldsMutex.Unlock()
 
-	defer func() {
-		sort.Slice(registeredFields, func(i, j int) bool {
-			return registeredFields[i] < registeredFields[j]
-		})
-	}()
-
 	for _, f := range fields {
 		var exist bool
 		for _, existingF := range registeredFields {
@@ -31,6 +25,10 @@ func RegisterField(fields ...Field) {
 			registeredFields = append(registeredFields, f)
 		}
 	}
+
+	sort.Slice(registeredFields, func(i, j int) bool {
+		return registeredFields[i] < registeredFields[j]
+	})
 }
 
 func UnregisterField(fields ...Field) {

log_test.go

@@ -110,15 +110,15 @@ func ExampleErrorWithStackTrace() {
 	// github.com/rockbears/log_test.ExampleErrorWithStackTrace
 	// 	/Users/fsamin/go/src/github.com/rockbears/log/log_test.go:106
 	// testing.runExample
-	// 	/Users/fsamin/Applications/go/src/testing/run_example.go:63
+	// 	/Users/fsamin/Applications/go/src/testing/run_example.go:64
 	// testing.runExamples
 	// 	/Users/fsamin/Applications/go/src/testing/example.go:44
 	// testing.(*M).Run
-	// 	/Users/fsamin/Applications/go/src/testing/testing.go:1419
+	// 	/Users/fsamin/Applications/go/src/testing/testing.go:1505
 	// main.main
 	// 	_testmain.go:51
 	// runtime.main
-	// 	/Users/fsamin/Applications/go/src/runtime/proc.go:225
+	// 	/Users/fsamin/Applications/go/src/runtime/proc.go:255
 	// runtime.goexit
-	// 	/Users/fsamin/Applications/go/src/runtime/asm_amd64.s:1371] this is an error
+	// 	/Users/fsamin/Applications/go/src/runtime/asm_amd64.s:1581] this is an error
 }