commit ce0fac28977af31f1dec411d3535b4de2c3169b3
author Bram Moolenaar <Bram@vim.org> Fri Sep 27 13:32:06 2019 +0200
committer Bram Moolenaar <Bram@vim.org> Fri Sep 27 13:32:06 2019 +0200
tree bacf6049681872b54c347a76ea5f6f5073dd262f
parent 30e8e73506e4522ef4aebf7d525c0e6ffe8805fd

patch 8.1.2083: multi-byte chars do not work properly with "%.*S" in printf()

Problem:    Multi-byte chars do not work properly with "%.*S" in printf().
Solution:   Use mb_ptr2cells(). Daniel Hahler, closes #4989)

src/testdir/test_expr.vim

diff --git a/src/testdir/test_expr.vim b/src/testdir/test_expr.vim
index 365a813..253cd49 100644
--- a/src/testdir/test_expr.vim
+++ b/src/testdir/test_expr.vim
@@ -248,6 +248,9 @@
   call assert_equal('abc ', printf('%-4s', 'abc'))
   call assert_equal('abc ', printf('%-4S', 'abc'))
 
+  call assert_equal('🐍', printf('%.2S', '🐍🐍'))
+  call assert_equal('', printf('%.1S', '🐍🐍'))
+
   call assert_equal('1%', printf('%d%%', 1))
 endfunc