commit 16e9b85113e0b354ece1cb4f5fcc7866850f3685
author Bram Moolenaar <Bram@vim.org> Sun May 19 19:59:35 2019 +0200
committer Bram Moolenaar <Bram@vim.org> Sun May 19 19:59:35 2019 +0200
tree 2abe4e3cffe8b0281f0690e5570a47eb2198a826
parent f5842c5a533346c4ff41ff666e465c85f1de35d5

patch 8.1.1355: obvious mistakes are accepted as valid expressions

Problem:    Obvious mistakes are accepted as valid expressions.
Solution:   Be more strict about parsing numbers. (Yasuhiro Matsumoto,
            closes #3981)

src/testdir/test_expr.vim

diff --git a/src/testdir/test_expr.vim b/src/testdir/test_expr.vim
index 216a00f..ccca792 100644
--- a/src/testdir/test_expr.vim
+++ b/src/testdir/test_expr.vim
@@ -512,3 +512,14 @@
   call assert_equal('b', 'a'[4:0] . 'b')
   call assert_equal('b', 'b' . 'a'[4:0])
 endfunc
+
+func Test_broken_number()
+  let X = 'bad'
+  call assert_fails('echo 1X', 'E15:')
+  call assert_fails('echo 0b1X', 'E15:')
+  call assert_fails('echo 0b12', 'E15:')
+  call assert_fails('echo 0x1X', 'E15:')
+  call assert_fails('echo 011X', 'E15:')
+  call assert_equal(2, str2nr('2a'))
+  call assert_fails('inoremap <Char-0b1z> b', 'E474:')
+endfunc