vim-patch:8.2.3659: integer overflow with large line number

Problem:    Integer overflow with large line number.
Solution:   Check for overflow. (closes vim/vim#9202)
https://github.com/vim/vim/commit/03725c5795ae5b8c14da4a39cd0ce723c6dd4304

Put E1247 in globals.h as E1240 is also there.
Do not make getdigits() abort.

1 files changed, 32 insertions, 0 deletions

diff --git a/test/functional/legacy/excmd_spec.lua b/test/functional/legacy/excmd_spec.lua
new file mode 100644
index 0000000000..174f7d292e
--- /dev/null
+++ b/test/functional/legacy/excmd_spec.lua
@@ -0,0 +1,32 @@
+local helpers = require('test.functional.helpers')(after_each)
+local clear = helpers.clear
+local exec_lua = helpers.exec_lua
+local meths = helpers.meths
+local source = helpers.source
+local eq = helpers.eq
+
+local function sizeoflong()
+  if not exec_lua('return pcall(require, "ffi")') then
+    pending('missing LuaJIT FFI')
+  end
+  return exec_lua('return require("ffi").sizeof(require("ffi").typeof("long"))')
+end
+
+describe('Ex command', function()
+  before_each(clear)
+  after_each(function() eq({}, meths.get_vvar('errors')) end)
+
+  it('checks for address line overflow', function()
+    if sizeoflong() < 8 then
+      pending('Skipped: only works with 64 bit long ints')
+    end
+
+    source [[
+      new
+      call setline(1, 'text')
+      call assert_fails('|.44444444444444444444444', 'E1247:')
+      call assert_fails('|.9223372036854775806', 'E1247:')
+      bwipe!
+    ]]
+  end)
+end)