[v3] dev mode, hot update vue file, cause fatal

[GuoTengda1993]

Description

4:08:05 PM [vite] (client) hmr update /src/components/proxy/Proxy.vue
4:08PM ERR

******************************** FATAL *********************************

•  There has been a catastrophic failure in your application.      *
  

**************************** Error Details *****************************
panic error: runtime error: invalid memory address or nil pointer dereference
runtime.panicmem
at /usr/local/go/src/runtime/panic.go:336
runtime.sigpanic
at /usr/local/go/src/runtime/signal_unix.go:931
cartools/apps.(*App).WindowGetHeight
at /Users/guotengda/Projects/cartools/apps/app.go:244
reflect.Value.call
at /usr/local/go/src/reflect/value.go:586
reflect.Value.Call
at /usr/local/go/src/reflect/value.go:369
github.com/wailsapp/wails/v3/pkg/application.(*BoundMethod).Call
at /Users/guotengda/go/pkg/mod/github.com/wailsapp/wails/v3@v3.0.0-alpha.74/pkg/application/bindings.go:321
github.com/wailsapp/wails/v3/pkg/application.(*MessageProcessor).processCallMethod
at /Users/guotengda/go/pkg/mod/github.com/wailsapp/wails/v3@v3.0.0-alpha.74/pkg/application/messageprocessor_call.go:119
github.com/wailsapp/wails/v3/pkg/application.(*MessageProcessor).HandleRuntimeCallWithIDs
at /Users/guotengda/go/pkg/mod/github.com/wailsapp/wails/v3@v3.0.0-alpha.74/pkg/application/messageprocessor.go:119
github.com/wailsapp/wails/v3/pkg/application.(*HTTPTransport).handleRuntimeRequest
at /Users/guotengda/go/pkg/mod/github.com/wailsapp/wails/v3@v3.0.0-alpha.74/pkg/application/transport_http.go:162
github.com/wailsapp/wails/v3/pkg/application.(*HTTPTransport).Handler.func1.1
at /Users/guotengda/go/pkg/mod/github.com/wailsapp/wails/v3@v3.0.0-alpha.74/pkg/application/transport_http.go:83
net/http.HandlerFunc.ServeHTTP
at /usr/local/go/src/net/http/server.go:2286
github.com/wailsapp/wails/v3/pkg/application.New.func3.1
at /Users/guotengda/go/pkg/mod/github.com/wailsapp/wails/v3@v3.0.0-alpha.74/pkg/application/application.go:120

---

To Reproduce

In vue file, there is some action in onMounted: get window size, events on ...

Expected behaviour

not fatal when hot update vue file

Screenshots

No response

Attempted Fixes

No response

System Details

Wails (v3.0.0-alpha.74)  Wails Doctor 
                                                                                                                                            
# System 

┌──────────────────────────────────────────────────┐
| Name          | MacOS                            |
| Version       | 26.2                             |
| ID            | 25C56                            |
| Branding      | MacOS 26.2                       |
| Platform      | darwin                           |
| Architecture  | arm64                            |
| Apple Silicon | true                             |
| CPU           | Apple M4 Pro                     |
| CPU 1         | Apple M4 Pro                     |
| CPU 2         | Apple M4 Pro                     |
| GPU           | 16 cores, Metal Support: Metal 4 |
| Memory        | 24 GB                            |
└──────────────────────────────────────────────────┘

# Build Environment 

┌──────────────────────────────────────────────────────────────────────┐
| Wails CLI      | v3.0.0-alpha.74                                     |
| Go Version     | go1.26.0                                            |
| -buildmode     | exe                                                 |
| -compiler      | gc                                                  |
| CGO_CFLAGS     |                                                     |
| CGO_CPPFLAGS   |                                                     |
| CGO_CXXFLAGS   |                                                     |
| CGO_ENABLED    | 1                                                   |
| CGO_LDFLAGS    |                                                     |
| DefaultGODEBUG | cryptocustomrand=1,tlssecpmlkem=0,urlstrictcolons=0 |
| GOARCH         | arm64                                               |
| GOARM64        | v8.0                                                |
| GOOS           | darwin                                              |
└──────────────────────────────────────────────────────────────────────┘

# Dependencies 

┌──────────────────────────────────────────────────────────────┐
| *NSIS           | v3.11                                      |
| Xcode cli tools | 2416                                       |
| npm             | 11.5.1                                     |
| docker          | *docker version 5.7.0 (daemon not running) |
|                                                              |
└────────────────── * - Optional Dependency ───────────────────┘

# Checking for issues 

 SUCCESS  No issues found

# Diagnosis 

 SUCCESS  Your system is ready for Wails development!

Additional context

No response

[leaanthony]

🤖 Triage note: Nil pointer dereference during HMR hot reload. Missing awaiting feedback — could you provide a minimal reproduction project? Platform and Wails version would also help.