Issue #11406 has been reported by Michael Martinez.

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Bug #11406: Inconsistent behavior when creating a range of strings which end in an integer greater than 10
https://bugs.ruby-lang.org/issues/11406

* Author: Michael Martinez
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: 2.2.2
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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# Steps to Reproduce

In Ruby v2.2.2

1. Create a range of strings using 'foo1' up to 'foo9':

('foo1'..'foo9').to_a
=> ["foo1", "foo2", "foo3", "foo4", "foo5", "foo6", "foo7", "foo8", "foo9"]

Observe the results are as we expect

2 Create a range of strings using 'foo1' up to 'foo10'  
('foo1'..'foo10').to_a
=> ["foo1", "foo2","foo3","foo4","foo5", "foo6", "foo7", "foo8", "foo9", "fop0","fop1", "fop2", "fop3", "fop4", "fop5", "fop6", "fop7", "fop8", "fop9", "foq0", ....]

Also:

('foo1'..'foo10').to_a.size
=> 4707939

Observe that the output loops 1..9 about 523104 times (arbitrarily?)

# Expected Results

The output in step 1 makes me expect for Ruby's range class to intelligently create ranges using a strings that include integers inside them. However this only seems to work for 1..9 ranges.

# Actual Results
Inconsistent behavior for range creation.


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Screen Shot 2015-07-29 at 5.40.16 PM.png (54.4 KB)


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