Prevent null pointer crash in Endstops::update

Thanks to Evgeny Kotsuba!
2018-03-20 04:20:45 -05:00 · 2018-03-20 04:20:45 -05:00 · a5c6d3c7b8
commit a5c6d3c7b8
parent 53362b81cc
1 changed files with 100 additions and 96 deletions
--- a/Marlin/src/module/endstops.cpp
+++ b/Marlin/src/module/endstops.cpp
@ -448,6 +448,8 @@ void Endstops::update() {
  /**
   * Check and update endstops according to conditions
   */
+  if (stepper.current_block) {
+
    if (X_MOVE_TEST) {
      if (stepper.motor_direction(X_AXIS_HEAD)) { // -direction
        #if HAS_X_MIN
@ -562,6 +564,8 @@ void Endstops::update() {
      }
    }

+  } // stepper.current_block
+
  old_endstop_bits = current_endstop_bits;

 } // Endstops::update()