panic when echo HTTPErrorHandler is triggered

[BapiGso]

package main

import (
	"github.com/CAFxX/httpcompression"
	"github.com/labstack/echo/v4"
)

func main()  {
	e:=echo.New()
	adapter, err := httpcompression.DefaultAdapter()
	if err != nil {
		return
	}
	e.Use(echo.WrapMiddleware(adapter))
	e.Start(":1323")
}

Use the above code, and then access an unregistered path to trigger HTTPErrorHandler and report the following error:

   ____    __
  / __/___/ /  ___
 / _// __/ _ \/ _ \
/___/\__/_//_/\___/ v4.11.4
High performance, minimalist Go web framework
https://echo.labstack.com
____________________________________O/_______
                                    O\
⇨ http server started on [::]:1323
echo: http: panic serving 127.0.0.1:64345: runtime error: invalid memory address or nil pointer dereference
goroutine 10 [running]:
net/http.(*conn).serve.func1()
	xxx/sdk/go1.21.0/src/net/http/server.go:1868 +0xb9
panic({0x11aa500?, 0x14c6d50?})
	xxx/sdk/go1.21.0/src/runtime/panic.go:920 +0x270
github.com/CAFxX/httpcompression.(*compressWriter).Header(0xc00008f920?)
	<autogenerated>:1 +0x1e
github.com/labstack/echo/v4.(*Response).Header(...)
	xxx/go/pkg/mod/github.com/labstack/echo/v4@v4.11.4/response.go:36
github.com/labstack/echo/v4.(*context).writeContentType(0x10321b9?, {0x12069cd, 0x1f})
	xxx/go/pkg/mod/github.com/labstack/echo/v4@v4.11.4/context.go:229 +0x30
github.com/labstack/echo/v4.(*context).json(0xc0000600a0, 0x194, {0x11abba0, 0xc00001ec30}, {0x0, 0x0})
	xxx/go/pkg/mod/github.com/labstack/echo/v4@v4.11.4/context.go:492 +0x45
github.com/labstack/echo/v4.(*context).JSON(0xc0000600a0, 0xc00001ec30?, {0x11abba0, 0xc00001ec30})
	xxx/go/pkg/mod/github.com/labstack/echo/v4@v4.11.4/context.go:502 +0xc7
github.com/labstack/echo/v4.(*Echo).DefaultHTTPErrorHandler(0xc000134240, {0x1281940, 0xc00001ed80?}, {0x1287648, 0xc0000600a0})
	xxx/go/pkg/mod/github.com/labstack/echo/v4@v4.11.4/echo.go:460 +0x46c
github.com/labstack/echo/v4.(*Echo).ServeHTTP(0xc000134240, {0x1283820?, 0xc0000942a0}, 0xc000518100)
	xxx/go/pkg/mod/github.com/labstack/echo/v4@v4.11.4/echo.go:670 +0x3bb
net/http.serverHandler.ServeHTTP({0xc00001ea50?}, {0x1283820?, 0xc0000942a0?}, 0x6?)
	xxx/sdk/go1.21.0/src/net/http/server.go:2938 +0x8e
net/http.(*conn).serve(0xc00012c120, {0x1283d50, 0xc00051a2d0})
	xxx/sdk/go1.21.0/src/net/http/server.go:2009 +0x5f4
created by net/http.(*Server).Serve in goroutine 1
	xxx/sdk/go1.21.0/src/net/http/server.go:3086 +0x5cb