Fixed bug in WHILE loop handling when first statement in macro.

changelog.md

@@ -1,11 +1,25 @@
 ## grblHAL changelog
 
+<a name="20230724"/>20230724
+
+Core:
+
+* Fixed bug in WHILE loop handling when first statement in macro.
+
+Drivers:
+
+* iMXRT1062: added [E5XMCS_T41](https://www.makerstore.com.au/product/elec-e5xmcst41/) board.
+
+* RP2040: fix to allow ModBus VFDs with BTT SKR Pico board. Issue (#68)[https://github.com/grblHAL/RP2040/issues/68]
+
+---
+
 <a name="20230718"/>20230718
 
 Core:
 
 * Some tweaks for new Web Builder options++
-* Fixed regression in VFS file system handling cauing hardfault when only one mount is present.
+* Fixed regression in VFS file system handling causing hardfault when only one mount is present.
 
 Plugins:
 

grbl.h

@@ -42,7 +42,7 @@
 #else
 #define GRBL_VERSION "1.1f"
 #endif
-#define GRBL_BUILD 20230718
+#define GRBL_BUILD 20230724
 
 #define GRBL_URL "https://github.com/grblHAL"
 

ngc_flowctrl.c

@@ -271,7 +271,7 @@ status_code_t ngc_flowctrl (uint32_t o_label, char *line, uint_fast8_t *pos, boo
         case NGCFlowCtrl_While:
             if(hal.stream.file) {
                 char *expr = line + *pos;
-                if(stack[stack_idx].brk) {
+                if(stack_idx >= 0 && stack[stack_idx].brk) {
                     if(last_op == NGCFlowCtrl_Do && o_label == stack[stack_idx].o_label)
                         stack_pull();
                 } else if(!skipping && (status = ngc_eval_expression(line, pos, &value)) == Status_OK) {