add asan error vm stacktrace

source/cell.c

@@ -574,7 +574,21 @@ int cell_init(int argc, char **argv)
     if (JS_IsException(result)) {
       JSValue exc = JS_GetException(ctx);
       const char *str = JS_ToCString(ctx, exc);
-      if (str) { printf("Exception: %s\n", str); JS_FreeCString(ctx, str); }
+      if (str) { printf("Error: %s\n", str); JS_FreeCString(ctx, str); }
+      cJSON *stack = JS_GetStack(ctx);
+      if (stack) {
+        int n = cJSON_GetArraySize(stack);
+        for (int i = 0; i < n; i++) {
+          cJSON *fr = cJSON_GetArrayItem(stack, i);
+          const char *fn = cJSON_GetStringValue(cJSON_GetObjectItem(fr, "function"));
+          const char *file = cJSON_GetStringValue(cJSON_GetObjectItem(fr, "file"));
+          int line = (int)cJSON_GetNumberValue(cJSON_GetObjectItem(fr, "line"));
+          int col = (int)cJSON_GetNumberValue(cJSON_GetObjectItem(fr, "column"));
+          printf("    at %s (%s:%d:%d)\n", fn ? fn : "<anonymous>", file ? file : "<unknown>", line, col);
+        }
+        cJSON_Delete(stack);
+      }
+      JS_FreeValue(ctx, exc);
     } else if (!JS_IsNull(result)) {
       const char *str = JS_ToCString(ctx, result);
       if (str) { printf("%s\n", str); JS_FreeCString(ctx, str); }
@@ -716,6 +730,20 @@ int cell_init(int argc, char **argv)
         printf("Error: %s\n", err_str);
         JS_FreeCString(ctx, err_str);
       }
+      cJSON *stack = JS_GetStack(ctx);
+      if (stack) {
+        int n = cJSON_GetArraySize(stack);
+        for (int i = 0; i < n; i++) {
+          cJSON *fr = cJSON_GetArrayItem(stack, i);
+          const char *fn = cJSON_GetStringValue(cJSON_GetObjectItem(fr, "function"));
+          const char *file = cJSON_GetStringValue(cJSON_GetObjectItem(fr, "file"));
+          int line = (int)cJSON_GetNumberValue(cJSON_GetObjectItem(fr, "line"));
+          int col = (int)cJSON_GetNumberValue(cJSON_GetObjectItem(fr, "column"));
+          printf("    at %s (%s:%d:%d)\n", fn ? fn : "<anonymous>", file ? file : "<unknown>", line, col);
+        }
+        cJSON_Delete(stack);
+      }
+      JS_FreeValue(ctx, exc);
       exit_code = 1;
     } else if (!JS_IsNull(result)) {
       const char *str = JS_ToCString(ctx, result);

source/quickjs.h

@@ -1260,6 +1260,11 @@ char *JS_Mcode (const char *ast_json);
    Returns result of execution, or JS_EXCEPTION on error. */
 JSValue JS_CallMcode (JSContext *ctx, const char *mcode_json);
 
+/* Get stack trace as cJSON array of frame objects.
+   Returns NULL if no register VM frame is active.
+   Caller must call cJSON_Delete() on the result. */
+struct cJSON *JS_GetStack (JSContext *ctx);
+
 /* Integrate a CellModule with an environment and execute.
    Returns callable function value, or JS_EXCEPTION on error. */
 JSValue cell_module_integrate (JSContext *ctx, CellModule *mod, JSValue env);

tests/demo.ce

@@ -0,0 +1,39 @@
+function safe_add(a, b) {
+  return a + b
+} disruption {
+  print("disruption caught in safe_add")
+}
+
+function inner() {
+  disrupt
+}
+
+function outer() {
+  inner()
+} disruption {
+  print("disruption caught in outer — from inner()")
+}
+
+// Test 1: explicit disrupt with handler
+function test_explicit() {
+  disrupt
+} disruption {
+  print("test 1: explicit disrupt handled")
+}
+test_explicit()
+
+// Test 2: type error disrupt (number + function)
+safe_add(1, print)
+
+// Test 3: unwinding — inner disrupts, outer catches
+outer()
+
+// Test 4: disrupt from inside disruption clause
+function test_nested() {
+  disrupt
+} disruption {
+  print("test 4: first disruption")
+}
+test_nested()
+
+print("done")

vm_test/syntax.txt

@@ -252,29 +252,21 @@ loop: for (var m = 0; m < 3; m++) {
   }
 }
 
-// --- try/catch/finally ---
-var tc
-try {
-  throw "error"
-} catch (e) {
-  tc = e
+// --- disrupt and disruption ---
+function disrupt_test() {
+  disrupt
 }
 
-var tcf = 0
-try {
-  throw "err"
-} catch (e) {
-  tcf = 1
-} finally {
-  tcf += 10
+function disruption_test() {
+  var x = 1
+} disruption {
+  var y = 2
 }
 
-// --- try/finally (no catch) ---
-var tf = 0
-try {
-  tf = 1
-} finally {
-  tf += 1
+function disrupt_with_disruption() {
+  disrupt
+} disruption {
+  var handled = true
 }
 
 // --- delete operator ---

vm_test/try_catch.txt

@@ -1 +0,0 @@
-try { 1 } catch(e) { 2 }

vm_test/try_catch_finally.txt

@@ -1 +0,0 @@
-var x = 1; try { throw 0 } catch(e) { x = 2 } finally { x = x + 1 }; x

vm_test/try_finally.txt

@@ -1 +0,0 @@
-var x = 1; try { x = 2 } finally { x = 3 }; x

vm_test/try_throw.txt

@@ -1 +0,0 @@
-try { throw "err" } catch(e) { e }