Can't import SQL exported from ERPNext.com; `not in gzip format`

Frappe Framework Bug
,
1 
$ bench restore ../../a/20180408_162742-a_erpnext_com-database.sql.gz 

gzip: /home/a/20180408_162742-a_erpnext_com-database.sql.gz: not in gzip format
Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/home/frappe/frappe-bench/apps/frappe/frappe/utils/bench_helper.py", line 97, in <module>
    main()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/utils/bench_helper.py", line 18, in main
    click.Group(commands=commands)(prog_name='bench')
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/commands/__init__.py", line 25, in _func
    ret = f(frappe._dict(ctx.obj), *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/commands/site.py", line 108, in restore
    sql_file_path = extract_sql_gzip(os.path.abspath(sql_file_path))
  File "/home/frappe/frappe-bench/apps/frappe/frappe/installer.py", line 387, in extract_sql_gzip
    subprocess.check_call(['gzip', '-d', '-v', '-f', sql_gz_path])
  File "/usr/lib/python2.7/subprocess.py", line 541, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '[u'gzip', u'-d', u'-v', u'-f', u'/home/a/20180408_162742-a_erpnext_com-database.sql.gz']' returned non-zero exit status 1

$ gunzip 20180408_162742-a_erpnext_com-database.sql.gz 

gzip: 20180408_162742-a_erpnext_com-database.sql.gz: not in gzip format

How do I deal with this?

2

The .gz file wasn’t actually an archive at all. It was a normal plaintext SQL with .gz appended:

$  head -10 20180408_162742-bavaria_erpnext_com-database.sql.gz 
-- MySQL dump 10.16  Distrib 10.2.12-MariaDB, for Linux (x86_64)
--
-- Host: localhost    Database: c396a683a76772fb
-- ------------------------------------------------------
-- Server version	10.2.12-MariaDB-log

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
3

The issue has been fixed. The next backup will work correctly.