fail on generators

Author: Rich-Harris

documentation/docs/98-reference/.generated/compile-errors.md

@@ -442,6 +442,12 @@ Expected whitespace
 Imports of `svelte/internal/*` are forbidden. It contains private runtime code which is subject to change without notice. If you're importing from `svelte/internal/*` to work around a limitation of Svelte, please open an issue at https://github.com/sveltejs/svelte and explain your use case
 ```
 
+### inspect_trace_generator
+
+```
+`$inspect.trace(...)` cannot be used inside a generator function
+```
+
 ### inspect_trace_invalid_placement
 
 ```

packages/svelte/messages/compile-errors/script.md

@@ -54,6 +54,10 @@
 
 > Imports of `svelte/internal/*` are forbidden. It contains private runtime code which is subject to change without notice. If you're importing from `svelte/internal/*` to work around a limitation of Svelte, please open an issue at https://github.com/sveltejs/svelte and explain your use case
 
+## inspect_trace_generator
+
+> `$inspect.trace(...)` cannot be used inside a generator function
+
 ## inspect_trace_invalid_placement
 
 > `$inspect.trace(...)` must be the first statement of a function body

packages/svelte/src/compiler/errors.js

@@ -215,6 +215,15 @@ export function inspect_trace_invalid_placement(node) {
 	e(node, "inspect_trace_invalid_placement", `\`$inspect.trace(...)\` must be the first statement of a function body\nhttps://svelte.dev/e/inspect_trace_invalid_placement`);
 }
 
+/**
+ * `$inspect.trace(...)` cannot be used inside a generator function
+ * @param {null | number | NodeLike} node
+ * @returns {never}
+ */
+export function inspect_trace_generator(node) {
+	e(node, "inspect_trace_generator", `\`$inspect.trace(...)\` cannot be used inside a generator function\nhttps://svelte.dev/e/inspect_trace_generator`);
+}
+
 /**
  * The arguments keyword cannot be used within the template or at the top level of a component
  * @param {null | number | NodeLike} node

packages/svelte/src/compiler/phases/2-analyze/visitors/CallExpression.js

@@ -158,6 +158,10 @@ export function CallExpression(node, context) {
 				e.inspect_trace_invalid_placement(node);
 			}
 
+			if (fn.generator) {
+				e.inspect_trace_generator(node);
+			}
+
 			if (dev) {
 				if (node.arguments[0]) {
 					context.state.scope.tracing = b.thunk(/** @type {Expression} */ (node.arguments[0]));