panic in debug mode if sleep methods are called in an exception handler (unless PICO_ALLOW_SLEEP_IN_EXCEPTION is set)

src/common/pico_time/time.c

@@ -325,6 +325,11 @@ static int64_t sev_callback(__unused alarm_id_t id, __unused void *user_data) {
 #endif
 
 void sleep_until(absolute_time_t t) {
+#if PICO_ON_DEVICE && !PICO_ALLOW_SLEEP_IN_EXCEPTION && !defined(NDEBUG)
+    if (__get_current_exception()) {
+        panic("Attempted to sleep inside of an exception handler");
+    }
+#endif
 #if !PICO_TIME_DEFAULT_ALARM_POOL_DISABLED
     uint64_t t_us = to_us_since_boot(t);
     uint64_t t_before_us = t_us - PICO_TIME_SLEEP_OVERHEAD_ADJUST_US;