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-rw-r--r--src/nvim/eval.c4
-rw-r--r--test/old/testdir/test_filter_map.vim9
-rw-r--r--test/old/testdir/test_functions.vim4
3 files changed, 16 insertions, 1 deletions
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 5826316828..ad2ff89f7e 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -1095,17 +1095,19 @@ bool is_compatht(const hashtab_T *ht)
}
/// Prepare v: variable "idx" to be used.
-/// Save the current typeval in "save_tv".
+/// Save the current typeval in "save_tv" and clear it.
/// When not used yet add the variable to the v: hashtable.
void prepare_vimvar(int idx, typval_T *save_tv)
{
*save_tv = vimvars[idx].vv_tv;
+ vimvars[idx].vv_str = NULL; // don't free it now
if (vimvars[idx].vv_type == VAR_UNKNOWN) {
hash_add(&vimvarht, vimvars[idx].vv_di.di_key);
}
}
/// Restore v: variable "idx" to typeval "save_tv".
+/// Note that the v: variable must have been cleared already.
/// When no longer defined, remove the variable from the v: hashtable.
void restore_vimvar(int idx, typval_T *save_tv)
{
diff --git a/test/old/testdir/test_filter_map.vim b/test/old/testdir/test_filter_map.vim
index 7658797759..fb435f4291 100644
--- a/test/old/testdir/test_filter_map.vim
+++ b/test/old/testdir/test_filter_map.vim
@@ -56,6 +56,15 @@ func Test_filter_map_list_expr_funcref()
call assert_equal([0, 2, 4, 6], map([1, 2, 3, 4], function('s:filter4')))
endfunc
+func Test_filter_map_nested()
+ let x = {"x":10}
+ let r = map(range(2), 'filter(copy(x), "1")')
+ call assert_equal([x, x], r)
+
+ let r = map(copy(x), 'filter(copy(x), "1")')
+ call assert_equal({"x": x}, r)
+endfunc
+
" dict with funcref
func Test_filter_map_dict_expr_funcref()
let dict = {"foo": 1, "bar": 2, "baz": 3}
diff --git a/test/old/testdir/test_functions.vim b/test/old/testdir/test_functions.vim
index 938928cd0b..3f9ac94782 100644
--- a/test/old/testdir/test_functions.vim
+++ b/test/old/testdir/test_functions.vim
@@ -2671,6 +2671,10 @@ func Test_readdir()
let files = readdir('Xdir', {x -> len(add(l, x)) == 2 ? -1 : 1})
call assert_equal(1, len(files))
+ " Nested readdir() must not crash
+ let files = readdir('Xdir', 'readdir("Xdir", "1") != []')
+ call sort(files)->assert_equal(['bar.txt', 'dir', 'foo.txt'])
+
eval 'Xdir'->delete('rf')
endfunc