From 2812c5c1a7992b0e31cf0c1ec45c6d4dafb1efe0 Mon Sep 17 00:00:00 2001
From: Gregory Lee <grlee77@gmail.com>
Date: Tue, 6 Sep 2022 12:17:42 -0400
Subject: [PATCH 1/4] assertion on path not containing meta should be meta/

this avoids disallowing key names such as 'metabolite', for instance
---
 zarr/hierarchy.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/zarr/hierarchy.py b/zarr/hierarchy.py
index 80da3ddbc6..241efc9a85 100644
--- a/zarr/hierarchy.py
+++ b/zarr/hierarchy.py
@@ -600,7 +600,7 @@ def _array_iter(self, keys_only, method, recurse):
         if self._version == 2:
             for key in sorted(listdir(self._store, self._path)):
                 path = self._key_prefix + key
-                assert not path.startswith("meta")
+                assert not path.startswith("meta/")
                 if contains_array(self._store, path):
                     _key = key.rstrip("/")
                     yield _key if keys_only else (_key, self[key])
@@ -615,7 +615,7 @@ def _array_iter(self, keys_only, method, recurse):
                 if key.endswith(array_sfx):
                     key = key[:-len(array_sfx)]
                 path = self._key_prefix + key
-                assert not path.startswith("meta")
+                assert not path.startswith("meta/")
                 if key.endswith('.group' + self._metadata_key_suffix):
                     # skip group metadata keys
                     continue

From 7b46b3fc0c57526bd5bdc41d9ee10d87c2e9b0a4 Mon Sep 17 00:00:00 2001
From: Gregory Lee <grlee77@gmail.com>
Date: Tue, 6 Sep 2022 12:22:07 -0400
Subject: [PATCH 2/4] remove meta check altogether from the v2 branch as it is
 v3-specific

---
 zarr/hierarchy.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/zarr/hierarchy.py b/zarr/hierarchy.py
index 241efc9a85..d60631ba65 100644
--- a/zarr/hierarchy.py
+++ b/zarr/hierarchy.py
@@ -600,7 +600,6 @@ def _array_iter(self, keys_only, method, recurse):
         if self._version == 2:
             for key in sorted(listdir(self._store, self._path)):
                 path = self._key_prefix + key
-                assert not path.startswith("meta/")
                 if contains_array(self._store, path):
                     _key = key.rstrip("/")
                     yield _key if keys_only else (_key, self[key])

From b9a1f72ce01736c3a2e55efd9548a3fc27d71477 Mon Sep 17 00:00:00 2001
From: Gregory Lee <grlee77@gmail.com>
Date: Tue, 6 Sep 2022 12:54:44 -0400
Subject: [PATCH 3/4] update docs/release.rst

---
 docs/release.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/release.rst b/docs/release.rst
index 2582c34e04..f69e0bc1b8 100644
--- a/docs/release.rst
+++ b/docs/release.rst
@@ -35,6 +35,9 @@ Bug fixes
 * Fix bug in LRUEStoreCache in which the current size wasn't reset on invalidation.
   By :user:`BGCMHou <BGCMHou>` and :user:`Josh Moore <joshmoore>` :issue:`1076`, :issue:`1077`.
 
+* Remove erroneous check that disallowed array keys starting with "meta".
+  By :user:`Gregory R. Lee <grlee77>`; :issue:`1105`.
+
 Documentation
 ~~~~~~~~~~~~~
 

From 1cec9fcb39cd5a6d6f7d298bd2874fac0ca54d22 Mon Sep 17 00:00:00 2001
From: Josh Moore <josh@openmicroscopy.org>
Date: Thu, 8 Sep 2022 08:30:27 +0200
Subject: [PATCH 4/4] Add test for #6853

---
 fixture/meta/.zarray       |  23 +++++++++++++++++++++++
 fixture/meta/0.0           | Bin 0 -> 48 bytes
 zarr/tests/test_storage.py |   6 ++++++
 3 files changed, 29 insertions(+)
 create mode 100644 fixture/meta/.zarray
 create mode 100644 fixture/meta/0.0

diff --git a/fixture/meta/.zarray b/fixture/meta/.zarray
new file mode 100644
index 0000000000..f265bb0674
--- /dev/null
+++ b/fixture/meta/.zarray
@@ -0,0 +1,23 @@
+{
+    "chunks": [
+        2,
+        2
+    ],
+    "compressor": {
+        "blocksize": 0,
+        "clevel": 5,
+        "cname": "lz4",
+        "id": "blosc",
+        "shuffle": 1
+    },
+    "dimension_separator": ".",
+    "dtype": "<i8",
+    "fill_value": 0,
+    "filters": null,
+    "order": "C",
+    "shape": [
+        2,
+        2
+    ],
+    "zarr_format": 2
+}
diff --git a/fixture/meta/0.0 b/fixture/meta/0.0
new file mode 100644
index 0000000000000000000000000000000000000000..cab0cbca723f5ff9fececdaba39bcca42c69cb3f
GIT binary patch
literal 48
gcmZQ#H0DrXU|;}Y10ZGuVh~`0Pz=mangvP&039&^xc~qF

literal 0
HcmV?d00001

diff --git a/zarr/tests/test_storage.py b/zarr/tests/test_storage.py
index 2203b95fe8..056dd8b637 100644
--- a/zarr/tests/test_storage.py
+++ b/zarr/tests/test_storage.py
@@ -2559,3 +2559,9 @@ def test_normalize_store_arg(tmpdir):
         path = tempfile.mkdtemp()
         store = normalize_store_arg("file://" + path, zarr_version=2, mode='w')
         assert isinstance(store, FSStore)
+
+
+def test_meta_prefix_6853():
+
+    fixture = group(store=DirectoryStore('fixture'))
+    assert list(fixture.arrays())