esp32s3 lockup repro

esp32s3-lockup/go.mod

@@ -0,0 +1,3 @@
+module esp32s3lockup
+
+go 1.26.2

esp32s3-lockup/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"machine"
+	"time"
+)
+
+func main() {
+	time.Sleep(3 * time.Second)
+
+	led := machine.GPIO37
+	led.Configure(machine.PinConfig{Mode: machine.PinOutput})
+
+	txDone := true
+	count := 0
+
+	processingCount := 0
+	for {
+		if txDone {
+			txDone = false
+			led.Set(false)
+			time.Sleep(249 * time.Millisecond)
+			led.Set(true)
+			println("hello world", count)
+			count += 1
+		} else {
+			if processingCount > 100000000 {
+				txDone = true
+				println("stall done")
+				processingCount = 0
+			}
+			processingCount += 1
+		}
+	}
+}