patch 9.1.1884: :defer an empty lambda causes a crash
Commit:
https://github.com/vim/vim/commit/f09ff72d48423d569a0fd3ed299ff80bfeeca0a2
Author: Yegappan Lakshmanan <[email protected]>
Date: Tue Oct 28 20:05:13 2025 +0000
patch 9.1.1884: :defer an empty lambda causes a crash
Problem: :defer an empty lambda causes a crash
(Maxim Kim, after v9.1.1882)
Solution: Check for missing arguments (Yegappan Lakshmanan)
related: #18641
closes: #18653
Signed-off-by: Yegappan Lakshmanan <[email protected]>
Signed-off-by: Christian Brabandt <[email protected]>
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 0134956c3..8de7bd357 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -5343,6 +5343,18 @@ def Test_defer_lambda_func()
defcompile
END
v9.CheckScriptFailure(lines, 'E1028: Compiling :def function failed', 1)
+
+ # Error: lambda without arguments
+ lines =<< trim END
+ vim9script
+ def Foo()
+ defer () => {
+ }
+ assert_report("shouldn't reach here")
+ enddef
+ defcompile
+ END
+ v9.CheckScriptFailure(lines, 'E107: Missing parentheses: ', 1)
enddef
" Test for using an non-existing type in a "for" statement.
diff --git a/src/version.c b/src/version.c
index c34ae0734..e225e9439 100644
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 1884,
/**/
1883,
/**/
diff --git a/src/vim9cmds.c b/src/vim9cmds.c
index 684d2ee66..d06759e80 100644
--- a/src/vim9cmds.c
+++ b/src/vim9cmds.c
@@ -2047,7 +2047,12 @@ compile_defer(char_u *arg_start, cctx_T *cctx)
// a lambda function
if (compile_lambda(&arg, cctx) != OK)
return NULL;
- paren = arg;
+ paren = vim_strchr(arg, '(');
+ if (paren == NULL)
+ {
+ semsg(_(e_missing_parenthesis_str), arg);
+ return NULL;
+ }
}
else
{
--
--
You received this message from the "vim_dev" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php
---
You received this message because you are subscribed to the Google Groups
"vim_dev" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion visit
https://groups.google.com/d/msgid/vim_dev/E1vDqKS-008NIM-0t%40256bit.org.
