Check the error returned by template.ParseFiles. Always check error returns.
Ian On Thu, Mar 26, 2020 at 10:53 AM <davetweetl...@gmail.com> wrote: > > Hey guys, > > I'm pretty new to Golang and encountering a runtime error which I'm not able > to fix. > > Need help guys! > > ********************************************************************************Error******************************************************************************************* > 020/03/26 22:55:04 http: panic serving [::1]:41498: runtime error: invalid > memory address or nil pointer dereference > goroutine 6 [running]: > net/http.(*conn).serve.func1(0xc000099040) > /usr/local/go/src/net/http/server.go:1767 +0x139 > panic(0x7815e0, 0xabef60) > /usr/local/go/src/runtime/panic.go:679 +0x1b2 > text/template.errRecover(0xc000054b30) > /usr/local/go/src/text/template/exec.go:164 +0x1cb > panic(0x7815e0, 0xabef60) > /usr/local/go/src/runtime/panic.go:679 +0x1b2 > text/template.(*Template).execute(0x0, 0x867380, 0xc0000d20e0, 0x7a01e0, > 0xc00000e2e0, 0x0, 0x0) > /usr/local/go/src/text/template/exec.go:218 +0x1c1 > text/template.(*Template).Execute(...) > /usr/local/go/src/text/template/exec.go:204 > main.Index(0x86d0c0, 0xc0000d20e0, 0xc000114000) > /home/dave/Go_workstation/src/web_calss/main.go:22 +0x11d > net/http.HandlerFunc.ServeHTTP(0x802840, 0x86d0c0, 0xc0000d20e0, 0xc000114000) > /usr/local/go/src/net/http/server.go:2007 +0x44 > net/http.(*ServeMux).ServeHTTP(0xaceda0, 0x86d0c0, 0xc0000d20e0, 0xc000114000) > /usr/local/go/src/net/http/server.go:2387 +0x1bd > net/http.serverHandler.ServeHTTP(0xc0000d2000, 0x86d0c0, 0xc0000d20e0, > 0xc000114000) > /usr/local/go/src/net/http/server.go:2802 +0xa4 > net/http.(*conn).serve(0xc000099040, 0x86d980, 0xc000068380) > /usr/local/go/src/net/http/server.go:1890 +0x875 > created by net/http.(*Server).Serve > /usr/local/go/src/net/http/server.go:2928 +0x384 > 2020/03/26 22:55:04 http: panic serving [::1]:41500: runtime error: invalid > memory address or nil pointer dereference > goroutine 18 [running]: > net/http.(*conn).serve.func1(0xc0000ee000) > /usr/local/go/src/net/http/server.go:1767 +0x139 > panic(0x7815e0, 0xabef60) > /usr/local/go/src/runtime/panic.go:679 +0x1b2 > text/template.errRecover(0xc000107b30) > /usr/local/go/src/text/template/exec.go:164 +0x1cb > panic(0x7815e0, 0xabef60) > /usr/local/go/src/runtime/panic.go:679 +0x1b2 > text/template.(*Template).execute(0x0, 0x867380, 0xc000148000, 0x7a01e0, > 0xc0000fc020, 0x0, 0x0) > /usr/local/go/src/text/template/exec.go:218 +0x1c1 > text/template.(*Template).Execute(...) > /usr/local/go/src/text/template/exec.go:204 > main.Index(0x86d0c0, 0xc000148000, 0xc000110000) > /home/dave/Go_workstation/src/web_calss/main.go:22 +0x11d > net/http.HandlerFunc.ServeHTTP(0x802840, 0x86d0c0, 0xc000148000, 0xc000110000) > /usr/local/go/src/net/http/server.go:2007 +0x44 > net/http.(*ServeMux).ServeHTTP(0xaceda0, 0x86d0c0, 0xc000148000, 0xc000110000) > /usr/local/go/src/net/http/server.go:2387 +0x1bd > net/http.serverHandler.ServeHTTP(0xc0000d2000, 0x86d0c0, 0xc000148000, > 0xc000110000) > /usr/local/go/src/net/http/server.go:2802 +0xa4 > net/http.(*conn).serve(0xc0000ee000, 0x86d980, 0xc0000f2000) > /usr/local/go/src/net/http/server.go:1890 +0x875 > created by net/http.(*Server).Serve > /usr/local/go/src/net/http/server.go:2928 +0x384 > 2020/03/26 22:55:04 http: panic serving [::1]:41502: runtime error: invalid > memory address or nil pointer dereference > goroutine 8 [running]: > net/http.(*conn).serve.func1(0xc000099180) > /usr/local/go/src/net/http/server.go:1767 +0x139 > panic(0x7815e0, 0xabef60) > /usr/local/go/src/runtime/panic.go:679 +0x1b2 > text/template.errRecover(0xc000054b30) > /usr/local/go/src/text/template/exec.go:164 +0x1cb > panic(0x7815e0, 0xabef60) > /usr/local/go/src/runtime/panic.go:679 +0x1b2 > text/template.(*Template).execute(0x0, 0x867380, 0xc0001480e0, 0x7a01e0, > 0xc0000fc060, 0x0, 0x0) > /usr/local/go/src/text/template/exec.go:218 +0x1c1 > text/template.(*Template).Execute(...) > /usr/local/go/src/text/template/exec.go:204 > main.Index(0x86d0c0, 0xc0001480e0, 0xc000114100) > /home/dave/Go_workstation/src/web_calss/main.go:22 +0x11d > net/http.HandlerFunc.ServeHTTP(0x802840, 0x86d0c0, 0xc0001480e0, 0xc000114100) > /usr/local/go/src/net/http/server.go:2007 +0x44 > net/http.(*ServeMux).ServeHTTP(0xaceda0, 0x86d0c0, 0xc0001480e0, 0xc000114100) > /usr/local/go/src/net/http/server.go:2387 +0x1bd > net/http.serverHandler.ServeHTTP(0xc0000d2000, 0x86d0c0, 0xc0001480e0, > 0xc000114100) > /usr/local/go/src/net/http/server.go:2802 +0xa4 > net/http.(*conn).serve(0xc000099180, 0x86d980, 0xc000068500) > /usr/local/go/src/net/http/server.go:1890 +0x875 > created by net/http.(*Server).Serve > /usr/local/go/src/net/http/server.go:2928 +0x384 > > > Please see the following code > *******************************************************************************Code******************************************************************************************** > package main > > import ( > "net/http" > "text/template" > "web_calss/controllers/demo_controller" > ) > > func main() { > http.HandleFunc("/", Index) > // http.HandleFunc("/demo/index", Index) > http.ListenAndServe(":8000", nil) > } > > func Index(w http.ResponseWriter, r *http.Request) { > > tmplt, _ := template.ParseFiles("views/demo_controller.index.html") > data := demo_controller.Data{ > Age: 27, > Username: "davetweetlive", > } > tmplt.Execute(w, data) > } > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > To view this discussion on the web visit > 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