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-rw-r--r--src/nvim/eval.c3
-rw-r--r--src/nvim/testdir/test_eval_stuff.vim10
2 files changed, 12 insertions, 1 deletions
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index fac56e9206..cd29e4ef19 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -19253,7 +19253,8 @@ static void set_var(const char *name, const size_t name_len, typval_T *const tv,
}
return;
} else if (v->di_tv.v_type != tv->v_type) {
- internal_error("set_var()");
+ EMSG2(_("E963: setting %s to value with wrong type"), name);
+ return;
}
}
diff --git a/src/nvim/testdir/test_eval_stuff.vim b/src/nvim/testdir/test_eval_stuff.vim
index 92e1ec5335..111c85bb95 100644
--- a/src/nvim/testdir/test_eval_stuff.vim
+++ b/src/nvim/testdir/test_eval_stuff.vim
@@ -11,3 +11,13 @@ endfunction
func Test_catch_return_with_error()
call assert_equal(1, s:foo())
endfunc
+
+func Test_E963()
+ " These commands used to cause an internal error prior to vim 8.1.0563
+ let v_e = v:errors
+ let v_o = v:oldfiles
+ call assert_fails("let v:errors=''", 'E963:')
+ call assert_equal(v_e, v:errors)
+ call assert_fails("let v:oldfiles=''", 'E963:')
+ call assert_equal(v_o, v:oldfiles)
+endfunc