From f70a4a03364f03432e35bf22402d6d1c7f2e40af Mon Sep 17 00:00:00 2001
From: Matt Valentine-House <matt@eightbitraptor.com>
Date: Thu, 8 Feb 2024 15:28:05 +0000
Subject: [PATCH] [PRISM] yield is invalid inside eval

---
 prism_compile.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/prism_compile.c b/prism_compile.c
index 9cee340c0e..095799db9b 100644
--- a/prism_compile.c
+++ b/prism_compile.c
@@ -7960,6 +7960,15 @@ pm_compile_node(rb_iseq_t *iseq, const pm_node_t *node, LINK_ANCHOR *const ret,
       case PM_YIELD_NODE: {
         pm_yield_node_t *yield_node = (pm_yield_node_t *)node;
 
+        switch (ISEQ_BODY(ISEQ_BODY(iseq)->local_iseq)->type) {
+          case ISEQ_TYPE_TOP:
+          case ISEQ_TYPE_MAIN:
+          case ISEQ_TYPE_CLASS:
+            COMPILE_ERROR(ERROR_ARGS "Invalid yield");
+            return;
+          default: /* valid */;
+        }
+
         int flags = 0;
         struct rb_callinfo_kwarg *keywords = NULL;