dvc status -c: confusing message when remote is unspecified

Current behavior

→ dvc status -c
WARNING: using obsoleted config format. Consider updating.
ERROR: failed to obtain data status - 'NoneType' object has no attribute 'path_info'

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Config contains just a single ssh remote section with an URL. There is no core section options defined in my config.

It couldn’t find the remote option in missing [core] and -r remotename option was not specified.

Expected behaviour

→ dvc status -c
ERROR: you should specify default remote in [core] config section or pass its name via `-r` argument

dvc version

DVC version: 0.50.1+cc9411
Python version: 3.7.3
Platform: Linux-5.1.3-arch1-1-ARCH-x86_64-with-arch-Arch-Linux
Binary: False
Cache: reflink - False, hardlink - True, symlink - True
Filesystem type (cache directory): ('ext4', '/dev/nvme0n1p5')
Filesystem type (workspace): ('ext4', '/dev/nvme0n1p5')

I use dvc from master.

[ei-grad]

This is solving the issue for me:

diff --git a/dvc/config.py b/dvc/config.py
index b0d280b8..787e8998 100644
--- a/dvc/config.py
+++ b/dvc/config.py
@@ -205,7 +205,7 @@ class Config(object):  # pylint: disable=too-many-instance-attributes
             SECTION_CORE_CHECKSUM_JOBS, default=None
         ): SECTION_CORE_CHECKSUM_JOBS_SCHEMA,
         # backward compatibility
-        Optional(SECTION_CORE_CLOUD, default=""): SECTION_CORE_CLOUD_SCHEMA,
+        Optional(SECTION_CORE_CLOUD): SECTION_CORE_CLOUD_SCHEMA,
         Optional(SECTION_CORE_STORAGEPATH, default=""): str,
     }

[ei-grad]

@pared in my case there is no core.cloud specified in the config file. Just an empty [core] section is enough to reproduce. Or core.analytics as it was in debug session some comments before.

But anyway I like the solution with dropping the legacy checks 😃. So never mind.