There are still some bugs about router

[rbee3u]

The #2767 didn't solve the problem completely, here is how to reproduce:

package main

import (
	"net/http"

	"github.com/gin-gonic/gin"
)

func main() {
	router := gin.Default()
	router.GET("/a/b", handler("/a/b"))
	router.GET("/a/:p/c", handler("/a/:p/c"))
	router.GET("/:p/d", handler("/:p/d"))
	_ = router.Run(":8080")
}

func handler(s string) gin.HandlerFunc {
	return func(c *gin.Context) {
		c.String(http.StatusOK, s)
	}
}

Expectations

$ curl 'http://127.0.0.1:8080/a/d'
/:p/d

Actual result

$ curl 'http://127.0.0.1:8080/a/d'
404 page not found

Suggestion

The backtracking progress need a stack for help, and it can't be solved by just caching the latest node.
So there are two ways:

• /:p and /a can not appear at the same time, just like httprouter
• we should use a stack data structure to help the backtracking

[appleboy]

See the solution: #2897

[thinkerou]

v1.7.7 have released, thanks! https://github.com/gin-gonic/gin/releases