shada: Make sure that code does not attempt to read too long items

Fixes #6957

1 files changed, 18 insertions, 0 deletions

diff --git a/test/functional/shada/errors_spec.lua b/test/functional/shada/errors_spec.lua
index 2b6b26b433..66c8c4ad2f 100644
--- a/test/functional/shada/errors_spec.lua
+++ b/test/functional/shada/errors_spec.lua
@@ -510,4 +510,22 @@ $
        .. '\nE574: Failed to write variable L',
        redir_exec('wshada'))
   end)
+
+  it('errors with too large items', function()
+    wshada({
+        1, 206,  70,  90,  31, 179,  86, 133, 169, 103, 101, 110, 101, 114,  97,
+      116, 111, 114, 196,   4, 145, 145, 145, 145, 145, 145,  96,  96,  96,  96,
+       96,  96,  96,  96,  96,  96,  96,  96,  96,  96,  96,  96,  96,  96,  96,
+       96,  96, 145, 145, 145, 145, 111, 110, 196,  25,  78,  86,  73,  77,  32,
+      118,   1,  46,  50,  46,  48,  45,  51,  48,  51,  45, 103,  98,  54,  55,
+       52, 102, 100,  50,  99, 169, 109,  97, 120,  95, 107,  98, 121, 116, 101,
+       10, 207, 207, 207, 207, 207, 207, 207, 207, 207, 207, 207, 207, 207, 207,
+      207, 207, 207, 207, 207, 207, 207, 207,  16,   8, 206,  89,  90,  30, 253,
+       35, 129, 161, 102, 196,  30,  47, 100, 101, 118,  47, 115, 104, 109,  47,
+      102, 117, 122, 122, 105, 110, 103,  45, 110, 118, 105, 109,  45, 115, 104,
+       97, 100,  97,  47, 108, 115,   2, 206,  89,  90,  30, 251,  13, 130, 162,
+      115, 112, 196,   3, 102, 111, 111, 162, 115,  99, 195,   3, 146,  10,   0,
+    })
+    eq('Vim(rshada):E576: Error while reading ShaDa file: there is an item at position 93 that is stated to be too long', exc_exec(sdrcmd()))
+  end)
 end)