go1.16 (#14783)

vendor/github.com/go-chi/chi/tree.go

@@ -6,7 +6,6 @@ package chi
 
 import (
 	"fmt"
-	"math"
 	"net/http"
 	"regexp"
 	"sort"
@@ -55,10 +54,10 @@ func RegisterMethod(method string) {
 		return
 	}
 	n := len(methodMap)
-	if n > strconv.IntSize {
+	if n > strconv.IntSize-2 {
 		panic(fmt.Sprintf("chi: max number of methods reached (%d)", strconv.IntSize))
 	}
-	mt := methodTyp(math.Exp2(float64(n)))
+	mt := methodTyp(2 << n)
 	methodMap[method] = mt
 	mALL |= mt
 }
@@ -430,6 +429,8 @@ func (n *node) findRoute(rctx *Context, method methodTyp, path string) *node {
 					} else {
 						continue
 					}
+				} else if ntyp == ntRegexp && p == 0 {
+					continue
 				}
 
 				if ntyp == ntRegexp && xn.rex != nil {