commit 4e2406c7a9d5f7f03faec8c42fac15c192fb59b0
author Bram Moolenaar <Bram@vim.org> Sat Jun 24 19:22:21 2023 +0100
committer Bram Moolenaar <Bram@vim.org> Sat Jun 24 19:22:21 2023 +0100
tree 455b40416915119a1b63b97471e580c8f7f2ac68
parent b46e0f3263acd99c61df06ee3c4d1f6e0b471bc3

patch 9.0.1662: crash when using a class member twice

Problem:    Crash when using a class member twice. (Christian J. Robinson)
Solution:   Make a copy of the value.

src/vim9execute.c

diff --git a/src/vim9execute.c b/src/vim9execute.c
index 921e2ca..eb663a1 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -3967,8 +3967,8 @@
 		    if (GA_GROW_FAILS(&ectx->ec_stack, 1))
 			goto theend;
 		    classmember_T *cm = &iptr->isn_arg.classmember;
-		    *STACK_TV_BOT(0) =
-				    cm->cm_class->class_members_tv[cm->cm_idx];
+		    copy_tv(cm->cm_class->class_members_tv + cm->cm_idx,
+							      STACK_TV_BOT(0));
 		    ++ectx->ec_stack.ga_len;
 		}
 		break;