commit b7f2270bab102d68f83a6300699b7f98efad81f2
author Bram Moolenaar <Bram@vim.org> Thu Apr 27 16:24:07 2023 +0100
committer Bram Moolenaar <Bram@vim.org> Thu Apr 27 16:24:07 2023 +0100
tree 937fbee712a1149b6b5fede0f77bf0b51110121a
parent fbf2071ac9ef08302a1df86c15f3d4ddbe871243

patch 9.0.1492: using uninitialized memory when argument is missing

Problem:    Using uninitialized memory when argument is missing.
Solution:   Check there are sufficient arguments before the base.
            (closes #12302)

src/testdir/test_expr.vim

diff --git a/src/testdir/test_expr.vim b/src/testdir/test_expr.vim
index 6d6efe7..c354367 100644
--- a/src/testdir/test_expr.vim
+++ b/src/testdir/test_expr.vim
@@ -458,6 +458,9 @@
   call v9.CheckLegacyAndVim9Success(lines)
 
   call v9.CheckLegacyAndVim9Failure(["call printf('123', 3)"], "E767:")
+
+  " this was using uninitialized memory
+  call v9.CheckLegacyAndVim9Failure(["eval ''->printf()"], "E119:")
 endfunc
 
 func Test_printf_float()

src/testdir/test_listener.vim

diff --git a/src/testdir/test_listener.vim b/src/testdir/test_listener.vim
index 413275d..d30add0 100644
--- a/src/testdir/test_listener.vim
+++ b/src/testdir/test_listener.vim
@@ -212,6 +212,8 @@
   call assert_fails('call listener_add([])', 'E921:')
   call assert_fails('call listener_add("s:StoreListArgs", [])', 'E730:')
   call assert_fails('call listener_flush([])', 'E730:')
+
+  call assert_fails('eval ""->listener_add()', 'E119:')
 endfunc
 
 func s:StoreBufList(buf, start, end, added, list)