pyexec: Handle a ctrl-c that comes in "very late"

jepler · jepler · commit e9bc8e892b5c · 2020-08-25T11:45:00.000-05:00
In relatively unusual circumstances, such as entering `l = 17 ** 17777` at the REPL, you could hit ctrl-c, but not get KeyboardInterrupt. This can lead to a condition where the display would stop updating (adafruit#2689).
diff --git a/lib/utils/pyexec.c b/lib/utils/pyexec.c
@@ -113,6 +113,8 @@ STATIC int parse_compile_execute(const void *source, mp_parse_input_kind_t input
         start = mp_hal_ticks_ms();
         mp_call_function_0(module_fun);
         mp_hal_set_interrupt_char(-1); // disable interrupt
+        // Handle any ctrl-c interrupt that arrived just in time
+        mp_handle_pending();
         nlr_pop();
         ret = 0;
         if (exec_flags & EXEC_FLAG_PRINT_EOF) {
