From f271ed415377175038a7cac1ab7171f3667b51b2 Mon Sep 17 00:00:00 2001
From: syumai <syumai@gmail.com>
Date: Wed, 17 Apr 2024 00:02:45 +0900
Subject: [PATCH] add reproduction code of
 https://github.com/syumai/workers/issues/100

---
 syumai-workers-repro-issue-100/.gitignore    |  3 ++
 syumai-workers-repro-issue-100/Makefile      | 12 +++++++
 syumai-workers-repro-issue-100/README.md     | 35 ++++++++++++++++++++
 syumai-workers-repro-issue-100/go.mod        |  7 ++++
 syumai-workers-repro-issue-100/go.sum        |  2 ++
 syumai-workers-repro-issue-100/main.go       | 14 ++++++++
 syumai-workers-repro-issue-100/wrangler.toml |  6 ++++
 7 files changed, 79 insertions(+)
 create mode 100644 syumai-workers-repro-issue-100/.gitignore
 create mode 100644 syumai-workers-repro-issue-100/Makefile
 create mode 100644 syumai-workers-repro-issue-100/README.md
 create mode 100644 syumai-workers-repro-issue-100/go.mod
 create mode 100644 syumai-workers-repro-issue-100/go.sum
 create mode 100644 syumai-workers-repro-issue-100/main.go
 create mode 100644 syumai-workers-repro-issue-100/wrangler.toml

diff --git a/syumai-workers-repro-issue-100/.gitignore b/syumai-workers-repro-issue-100/.gitignore
new file mode 100644
index 0000000..7fd93e1
--- /dev/null
+++ b/syumai-workers-repro-issue-100/.gitignore
@@ -0,0 +1,3 @@
+build
+node_modules
+.wrangler
\ No newline at end of file
diff --git a/syumai-workers-repro-issue-100/Makefile b/syumai-workers-repro-issue-100/Makefile
new file mode 100644
index 0000000..7f0c8e8
--- /dev/null
+++ b/syumai-workers-repro-issue-100/Makefile
@@ -0,0 +1,12 @@
+.PHONY: dev
+dev:
+	wrangler dev
+
+.PHONY: build
+build:
+	go run github.com/syumai/workers/cmd/workers-assets-gen@v0.23.1 -mode=go
+	GOOS=js GOARCH=wasm go build -o ./build/app.wasm .
+
+.PHONY: deploy
+deploy:
+	wrangler deploy
diff --git a/syumai-workers-repro-issue-100/README.md b/syumai-workers-repro-issue-100/README.md
new file mode 100644
index 0000000..0443f78
--- /dev/null
+++ b/syumai-workers-repro-issue-100/README.md
@@ -0,0 +1,35 @@
+# syumai-workers-repro-issue-100
+
+* A reproduction code of https://github.com/syumai/workers/issues/100
+
+## Reproduction code
+
+* A HandlerFunc without writing response body causes weird error.
+
+```go
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
+		// doing nothing here causes weird error
+	})
+	workers.Serve(nil) // use http.DefaultServeMux
+}
+```
+
+## How to reproduce
+
+```
+$ make dev # run this command in another terminal
+$ curl localhost:8787
+TypeError: Cannot read properties of undefined (reading 'exports')
+    at syscall/js.valueNew (file:///home/syumai/go/src/github.com/syumai/workers-playground/syumai-workers-repro-issue-100/build/wasm_exec.js:395:24)
+    at [object Object]
+    at [object Object]
+    at [object Object]
+    at [object Object]
+    at [object Object]
+    at globalThis.Go._resume (file:///home/syumai/go/src/github.com/syumai/workers-playground/syumai-workers-repro-issue-100/build/wasm_exec.js:553:23)
+    at Object.handleRequest (file:///home/syumai/go/src/github.com/syumai/workers-playground/syumai-workers-repro-issue-100/build/wasm_exec.js:564:8)
+    at Object.fetch (file:///home/syumai/go/src/github.com/syumai/workers-playground/syumai-workers-repro-issue-100/build/shim.mjs:51:18)
+    at async jsonError (file:///home/syumai/.nvm/versions/node/v20.12.2/lib/node_modules/wrangler/templates/middleware/middleware-miniflare3-json-error.ts:22:10)
+```
+
diff --git a/syumai-workers-repro-issue-100/go.mod b/syumai-workers-repro-issue-100/go.mod
new file mode 100644
index 0000000..26fdfc2
--- /dev/null
+++ b/syumai-workers-repro-issue-100/go.mod
@@ -0,0 +1,7 @@
+module github.com/syumai/workers-playground/syumai-workers-repro-issue-100
+
+go 1.21.3
+
+toolchain go1.22.2
+
+require github.com/syumai/workers v0.23.3
diff --git a/syumai-workers-repro-issue-100/go.sum b/syumai-workers-repro-issue-100/go.sum
new file mode 100644
index 0000000..d9793a2
--- /dev/null
+++ b/syumai-workers-repro-issue-100/go.sum
@@ -0,0 +1,2 @@
+github.com/syumai/workers v0.23.3 h1:7RZwe+EhOhLlFvrDMbgWFf2wc/G17i4uq4GsSG0uNrI=
+github.com/syumai/workers v0.23.3/go.mod h1:ZnqmdiHNBrbxOLrZ/HJ5jzHy6af9cmiNZk10R9NrIEA=
diff --git a/syumai-workers-repro-issue-100/main.go b/syumai-workers-repro-issue-100/main.go
new file mode 100644
index 0000000..29f29a7
--- /dev/null
+++ b/syumai-workers-repro-issue-100/main.go
@@ -0,0 +1,14 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/syumai/workers"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
+		// doing nothing here causes weird error
+	})
+	workers.Serve(nil) // use http.DefaultServeMux
+}
diff --git a/syumai-workers-repro-issue-100/wrangler.toml b/syumai-workers-repro-issue-100/wrangler.toml
new file mode 100644
index 0000000..1612728
--- /dev/null
+++ b/syumai-workers-repro-issue-100/wrangler.toml
@@ -0,0 +1,6 @@
+name = "go-worker"
+main = "./build/worker.mjs"
+compatibility_date = "2024-04-15"
+
+[build]
+command = "make build"