group or groups table names break the parser

[slve]

echo -e 'select 1 from group' | sqlfluff parse -

[L:  1, P:  1]      |file:
[L:  1, P:  1]      |    statement:
[L:  1, P:  1]      |        select_statement:
[L:  1, P:  1]      |            select_clause:
[L:  1, P:  1]      |                keyword:                                      'select'
[L:  1, P:  7]      |                [META] indent:
[L:  1, P:  7]      |                whitespace:                                   ' '
[L:  1, P:  8]      |                select_clause_element:
[L:  1, P:  8]      |                    literal:                                  '1'
[L:  1, P:  9]      |            whitespace:                                       ' '
[L:  1, P: 10]      |            [META] dedent:
[L:  1, P: 10]      |            from_clause:
[L:  1, P: 10]      |                unparsable:                                   !! Expected: 'FromClauseSegment'
[L:  1, P: 10]      |                    keyword:                                  'from'
[L:  1, P: 14]      |            unparsable:                                       !! Expected: 'Nothing...'
[L:  1, P: 14]      |                whitespace:                                   ' '
[L:  1, P: 15]      |                raw:                                          'group'
[L:  1, P: 20]      |    newline:                                                  '\n'

==== parsing violations ====
L:   1 | P:  10 |  PRS | Line 1, Position 10: Found unparsable section: 'from'
L:   1 | P:  14 |  PRS | Line 1, Position 14: Found unparsable section: ' group'

Expected Behaviour

echo -e 'select 1 from anyothertablename' | sqlfluff parse -

[L:  1, P:  1]      |file:
[L:  1, P:  1]      |    statement:
[L:  1, P:  1]      |        select_statement:
[L:  1, P:  1]      |            select_clause:
[L:  1, P:  1]      |                keyword:                                      'select'
[L:  1, P:  7]      |                [META] indent:
[L:  1, P:  7]      |                whitespace:                                   ' '
[L:  1, P:  8]      |                select_clause_element:
[L:  1, P:  8]      |                    literal:                                  '1'
[L:  1, P:  9]      |            whitespace:                                       ' '
[L:  1, P: 10]      |            [META] dedent:
[L:  1, P: 10]      |            from_clause:
[L:  1, P: 10]      |                keyword:                                      'from'
[L:  1, P: 14]      |                whitespace:                                   ' '
[L:  1, P: 15]      |                from_expression:
[L:  1, P: 15]      |                    [META] indent:
[L:  1, P: 15]      |                    from_expression_element:
[L:  1, P: 15]      |                        table_expression:
[L:  1, P: 15]      |                            table_reference:
[L:  1, P: 15]      |                                identifier:                   'anyothertablename'
[L:  1, P: 32]      |                    [META] dedent:
[L:  1, P: 32]      |    newline:                                                  '\n'

Observed Behaviour

• Using group or groups as table name breaks parsing.
• Note: using group as column name is fine.

Steps to Reproduce

• echo -e 'select 1 from group' | sqlfluff parse -
• echo -e 'select 1 from groups' | sqlfluff parse -

Dialect

• All

Version

sqlfluff --version
sqlfluff, version 0.6.8

Configuration

• No config, using defaults.