Request hangs with 100% CPU usage when route has a path param and URL is terminated with "/"

[gnyekhelyi]

Issue Description

Request hangs (no response), the server process has 100% CPU usage when route has a path parameter (e.g.: "/users/:id") and URL is terminated with "/"

Checklist

• Dependencies installed
• No typos
• Searched existing issues and docs

Expected behaviour

404 error

Actual behaviour

Request hangs, causing the server process to use 100% CPU

Steps to reproduce

curl localhost:8080/users/123/

Working code to debug

package main

import (
	"github.com/labstack/echo/v4"
	"net/http"
)

func main() {
	e := echo.New()
	e.GET("/users/:id", func(c echo.Context) error {
		id := c.Param("id")
		return c.String(http.StatusOK, "id=" + id)
	})
	e.Logger.Fatal(e.Start(": 8080"))
}

Version/commit

v4.1.14

[lammel]

This is a duplicate of #1503 and #1493 which is fixed by PR #1501 already.

For a workaround see #1503, will be fixed in the next release.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.