Update vendor

vendor/gopkg.in/airbrake/gobrake.v2/util.go

@@ -0,0 +1,59 @@
+package gobrake
+
+import (
+	"runtime"
+	"strings"
+)
+
+func stackFilter(packageName, funcName string, file string, line int) bool {
+	return packageName == "runtime" && funcName == "panic"
+}
+
+type StackFrame struct {
+	File string `json:"file"`
+	Line int    `json:"line"`
+	Func string `json:"function"`
+}
+
+func stack(depth int) []StackFrame {
+	stack := []StackFrame{}
+	for i := depth; ; i++ {
+		pc, file, line, ok := runtime.Caller(i)
+		if !ok {
+			break
+		}
+		packageName, funcName := packageFuncName(pc)
+		if stackFilter(packageName, funcName, file, line) {
+			stack = stack[:0]
+			continue
+		}
+		stack = append(stack, StackFrame{
+			File: file,
+			Line: line,
+			Func: funcName,
+		})
+	}
+
+	return stack
+}
+
+func packageFuncName(pc uintptr) (string, string) {
+	f := runtime.FuncForPC(pc)
+	if f == nil {
+		return "", ""
+	}
+
+	packageName := ""
+	funcName := f.Name()
+
+	if ind := strings.LastIndex(funcName, "/"); ind > 0 {
+		packageName += funcName[:ind+1]
+		funcName = funcName[ind+1:]
+	}
+	if ind := strings.Index(funcName, "."); ind > 0 {
+		packageName += funcName[:ind]
+		funcName = funcName[ind+1:]
+	}
+
+	return packageName, funcName
+}