[Bugs] #1910 NORM: OLPC-Calculate Activity – Inverse value of zero is getting unexpected error message.

[Sugar Labs Bugs]

#1910: OLPC-Calculate Activity – Inverse value of zero is getting unexpected error
message.
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    Reporter:  Niranjala80                                        |          Owner:  rwh                        
        Type:  defect                                             |         Status:  new                        
    Priority:  Normal                                             |      Milestone:  Unspecified by Release Team
   Component:  Calculate                                          |        Version:  0.84.x                     
    Severity:  Minor                                              |       Keywords:  OS13                       
Distribution:  Other (name your distribution in the description)  |   Status_field:  New                        
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 '''Description:'''
 Press on zero (0).
 Click on inverse option.
 Click on enter.
 It display “Error at 4: 0.0 cannot be raised to a negative power”
 But this should be infinite (∞)


 '''Steps to recreate the defect:'''


 1.      Power on OLPC
 2.      Click on the calculate icon on home page.
 3.      Click on Algebra tab.
 4.      Place the cursor on entry box.
 5.      Press zero.
 6.      Click on Inverse option.
 7.      Click on Entry button.
 8.      Verify the result displayed on the right side box.

 '''Actual Result:'''

 User gets an error message mentioning, “Error at 4: 0.0 cannot be raised
 to a negative power”.


 '''Expected Result:'''

 User should get the value as infinite (∞).

 '''Tested Environment:'''

 OS build: 802b5
 Machine type: XO1
 Firmware: Q2E41
 Security disable: Yes
 Sugar version: 0.82.1
 Activity Version: 30

 OS build: OS13
 Machine type: XO1
 Firmware: Q2E42
 Security disable: Yes
 Sugar version: 0.84.14
 Activity Version: 30

 OS build: OS116
 Machine type: XO1.5
 Firmware: Q3A35
 Security disable: Yes
 Sugar version: 0.84.14
 Activity Version: 30

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Ticket URL: <http://bugs.sugarlabs.org/ticket/1910>
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