Flash panic

[mraron]

[PANIC RECOVER] runtime error: index out of range [0] with length 0 goroutine 133501 [running]:\ngithub.com/mraron/njudge/internal/web.(*Server).SetupEcho.Recover.RecoverWithConfig.func9.1.1()\n\t/root/go/pkg/mod/github.com/labstack/echo/v4@v4.12.0/middleware/recover.go:99 +0x165\npanic({0xde51c0?, 0xc0107f3f80?})\n\t/usr/local/go/src/runtime/panic.go:770 +0x132\ngithub.com/mraron/njudge/internal/web/templates.GetFlash({0xffe950, 0xc006075180}, {0xc007b86b17?, 0x5?})\n\t/app/internal/web/templates/flash.go:43 +0x185\ngithub.com/mraron/njudge/internal/web.(*Server).SetupEcho.MoveF
lashesToContextMiddleware.func5.1({0xffe950, 0xc006075180})\n\t/app/internal/web/templates/flash.go:63 +0xc5\ngithub.com/mraron/njudge/internal/web.(*Server).SetupEcho.SetUserMiddleware.func4.1({0xffe950, 0xc006075180})\n\t/app/internal/w
eb/handlers/user/middleware.go:47 +0x113\ngithub.com/mraron/njudge/internal/web.(*Server).SetupEcho.SetTranslatorMiddleware.func3.1({0xffe950, 0xc006075180})\n\t/app/internal/web/templates/i18n/translate.go:106 +0x116\ngithub.com/labstack/echo/v4/middleware.CSRFWithConfig.func1.1({0xffe950, 0xc006075180})\n\t/root/go/pkg/mod/github.com/labstack/echo/v4@v4.12.0/middleware/csrf.go:211 +0x704\ngithub.com/labstack/echo/v4/middleware.GzipWithConfig.func1.1({0xffe950, 0xc006075180})\n\t/root/go/pkg/mod/github.com/labstack/echo/v4@v4.12.0/middleware/compress.go:139 +0x2a3\ngithub.com/mraron/njudge/internal/web.(*Server).SetupEcho.Middleware.MiddlewareWithConfig.func10.1({0xffe950, 0xc006075180})\n\t/root/go/pkg/
mod/github.com/labstack/echo-contrib@v0.17.1/session/session.go:73 +0x104\ngithub.com/mraron/njudge/internal/web.(*Server).SetupEcho.Recover.RecoverWithConfig.func9.1({0xffe950, 0xc006075180})\n\t/root/go/pkg/mod/github.com/labstack/echo/
v4@v4.12.0/middleware/recover.go:130 +0x114\ngithub.com/mraron/njudge/internal/web.(*Server).SetupEcho.New.NewWithConfig.func8.1({0xffe950, 0xc006075180})\n\t/root/go/pkg/mod/github.com/samber/slog-echo@v1.14.1/middleware.go:128 +0x2ee\ng
ithub.com/labstack/echo/v4.(*Echo).ServeHTTP(0xc0001c4248, {0xfef2f0, 0xc0001eca80}, 0xc0056e9560)\n\t/root/go/pkg/mod/github.com/labstack/echo/v4@v4.12.0/echo.go:674 +0x327\nnet/http.serverHandler.ServeHTTP({0xc0098e96e0?}, {0xfef2f0?, 0
xc0001eca80?}, 0x6?)\n\t/usr/local/go/src/net/http/server.go:3137 +0x8e\nnet/http.(*conn).serve(0xc006bca630, {0xff0410, 0xc00030ccf0})\n\t/usr/local/go/src/net/http/server.go:2039 +0x5e8\ncreated by net/http.(*Server).Serve in goroutine 1\n\t/usr/local/go/src/net/http/server.go:3285 +0x4b4\n\ngoroutine 1 [IO wait]:\ninternal/poll.runtime_pollWait(0x7f2cb52bb4b8, 0x72)\n\t/usr/local/go/src/runtime/netpoll.go:345 +0x85\ninternal/poll.(*pollDesc).wait(0x49?, 0x1?, 0x0)\n\t/usr/local/go/src/internal/poll/fd_poll_runtime.go:84 +0x27\ninternal/poll.(*pollDesc).waitRead(...)\n\t/usr/local/go/src/internal/poll/fd_poll_runtime.go:89\ninternal/poll.(*FD).Accept(0xc00638a200)\n\t/usr/local/go/src/internal/poll/fd_u
nix.go:611 +0x2ac\nnet.(*netFD).accept(0xc00638a200)\n\t/usr/local/go/src/net/fd_unix.go:172 +0x29\nnet.(*TCPListener).accept(0xc0037ef3e0)\n\t/usr/local/go/src/net/tcpsock_posix.go:159 +0x1e\nnet.(*TCPListener).Accept(0xc0037ef3e0)\n\t/u
sr/local/go/src/net/tcpsock.go:327 +0x30\nnet/http.(*Server).Serve(0xc0024de000, {0xfef5e0, 0xc0037ef3e0})\n\t/usr/local/go/src/net/http/server.go:3255 +0x33e\nnet/http.(*Server).ListenAndServe(0xc0024de000)\n\t/usr/local/go/src/net/http/server.go:3184 +0x71\ngithub.com/mraron/njudge/internal/web.(*Server).Run(0xc0000e3608, {0xff03d8, 0x15dbc60})\n\t/app/internal/web/server.go:58 +0x256\ngithub.com/mraron/njudge/cmd.NewWebCmd.func2(0xc000218f08, {0xe3df69?, 0x4?, 0xe3de39?})\n\t/app/cmd/web.go:110 +0x658\ngithub.com/spf13/cobra.(*Command).execute(0xc000218f08, {0x15dbc60, 0x0, 0x0})\n\t/root/go/pkg/mod/github.com/spf13/cobra@v1.8.0/command.go:983 +0xaca\ngithub.com/spf13/cobra.(*Command).ExecuteC(0x156c7c
0)\n\t/root/go/pkg/mod/github.com/spf13/cobra@v1.8.0/command.go:1115 +0x3ff\ngithub.com/spf13/cobra.(*Command).Execute(...)\n\t/root/go/pkg/mod/github.com/spf13/cobra@v1.8.0/command.go:1039\ngithub.com/mraron/njudge/cmd.Execute()\n\t/app/
cmd/root.go:50 +0xe5\nmain.main()\n\t/app/main.go:37 +0x19f\n\ngoroutine 6 [select, 126 minutes]:\ndatabas\n