Fix: out of range fidx in invoke message

Author: tolauwae

src/Debug/debugger.cpp

@@ -357,6 +357,11 @@ uint8_t *Debugger::findOpcode(Module *m, Block *block) {
 void Debugger::handleInvoke(Module *m, uint8_t *interruptData) {
     uint32_t fidx = read_L32(&interruptData);
 
+    if (fidx < 0 || fidx >= m->function_count) {
+        debug("no function available for fidx %" PRIi32 "\n", fidx);
+        return;
+    }
+
     Type func = *m->functions[fidx].type;
     StackValue *args = readArgs(func, interruptData);
 

src/Debug/debugger.h

@@ -99,7 +99,7 @@ class Debugger {
 
     //// Handle REPL interrupts
 
-    void handleInvoke(Module *m, uint8_t *interruptData);
+    static void handleInvoke(Module *m, uint8_t *interruptData);
 
     //// Handle Interrupt Types