bugGrammatica - Bugs: bug #7998, Possible divide by zero when...

 
 

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bug #7998: Possible divide by zero when running --profile

Submitted by:  Per Cederberg <cederberg>
Submitted on:  Thu 04 Mar 2004 09:05:05 AM UTC  
 
Severity: 2 - NormalItem Group: Software
Status: FixedAssigned to: Per Cederberg <cederberg>
Open/Closed: Closed

Sat 14 Mar 2009 09:34:51 AM UTC, comment #3:

Version 1.5 was released on 2009-03-07. Closing this issue.

Per Cederberg <cederberg>
Project AdministratorIn charge of this item.
Wed 24 Mar 2004 08:11:13 PM UTC, comment #2:

This has been resolved by always adding 1 millisecond to the time measured. The fix has been pushed to CVS and will appear in the next release (probably 1.5).

Per Cederberg <cederberg>
Project AdministratorIn charge of this item.
Wed 24 Mar 2004 07:43:55 PM UTC, comment #1:

Also reported on the mailing list by Stefan Ukena.

Per Cederberg <cederberg>
Project AdministratorIn charge of this item.
Thu 04 Mar 2004 09:05:05 AM UTC, original submission:

In some cases, for very short inputs, the --profile counts zero (0) milliseconds of execution time. This in turn will cause a divide by zero error when attempting to calculate the average parsing speed.

As reported by Lukas Zapletal:

Try to: gramm arithmetic.grammar --profile

Tokenizing a-test.data

Time elapsed: 0 millisec
Tokens found: 11
INTERNAL ERROR: ...
java.lang.ArithmeticException: / by zero
at net.percederberg.grammatica.Grammatica.profile(Grammatica.java:522)
at net.percederberg.grammatica.Grammatica.main(Grammatica.java:175)

Bug is here:
System.out.println(" Time elapsed: " + time + " millisec");
System.out.println(" Tokens found: " + counter);
System.out.println(" Average speed: " + (counter / time) + "tokens/millisec"); *** HERE - divide by zero ***
System.out.println();

Per Cederberg <cederberg>
Project AdministratorIn charge of this item.

 

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Items that depend on this one: None found

 

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    Follow 3 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sat 14 Mar 2009 09:34:51 AM UTCcederbergOpen/ClosedOpen=>Closed
      Discussion LockUnlocked=>Locked
    Wed 24 Mar 2004 08:11:13 PM UTCcederbergStatusNone=>Fixed

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