TODO: defer workaround, should remove after fix

runtime/internal/lib/io/pipe.go

@@ -80,7 +80,7 @@ func (p *pipe) write(b []byte) (n int, err error) {
 		return 0, p.writeCloseError()
 	default:
 		p.wrMu.Lock()
-		defer p.wrMu.Unlock()
+		//TODO(lijie): workaround for defer crash on wasm
 	}
 
 	for once := true; once || len(b) > 0; once = false {
@@ -90,9 +90,11 @@ func (p *pipe) write(b []byte) (n int, err error) {
 			b = b[nw:]
 			n += nw
 		case <-p.done:
+			p.wrMu.Unlock()
 			return n, p.writeCloseError()
 		}
 	}
+	p.wrMu.Unlock()
 	return n, nil
 }
 

runtime/internal/lib/sync/map.go

@@ -380,7 +380,7 @@ func (m *Map) CompareAndSwap(key, old, new any) bool {
 	}
 
 	m.mu.Lock()
-	defer m.mu.Unlock()
+	//TODO(lijie): workaround for defer crash on wasm
 	read = m.loadReadOnly()
 	swapped := false
 	if e, ok := read.m[key]; ok {
@@ -395,6 +395,7 @@ func (m *Map) CompareAndSwap(key, old, new any) bool {
 		// more efficient steady state.
 		m.missLocked()
 	}
+	m.mu.Unlock()
 	return swapped
 }
 

runtime/internal/lib/syscall/env_unix.go

@@ -163,12 +163,13 @@ func Clearenv() {
 func Environ() []string {
 	envOnce.Do(copyenv)
 	envLock.RLock()
-	defer envLock.RUnlock()
+	//TODO(lijie): workaround for defer crash on wasm
 	a := make([]string, 0, len(envs))
 	for _, env := range envs {
 		if env != "" {
 			a = append(a, env)
 		}
 	}
+	envLock.RUnlock()
 	return a
 }

runtime/internal/lib/time/zoneinfo_read.go

@@ -577,7 +577,7 @@ func readFile(name string) ([]byte, error) {
 	if err != nil {
 		return nil, err
 	}
-	defer closefd(f)
+	//TODO(lijie): workaround for defer crash on wasm
 	var (
 		buf [4096]byte
 		ret []byte
@@ -592,9 +592,11 @@ func readFile(name string) ([]byte, error) {
 			break
 		}
 		if len(ret) > maxFileSize {
+			closefd(f)
 			return nil, fileSizeError(name)
 		}
 	}
+	closefd(f)
 	return ret, err
 }