[Grammatica-users] ERROR "An internal error in Grammatica has been found" / Division by Zero

[Stefan Ukena]

Hi Per,

while playing some more with my grammar I encountered the following
error (using --profile):

<snip>

Tokenizing portalhelper_grammartest.txt
  Time elapsed:  10 millisec
  Tokens found:  35
  Average speed: 3 tokens/millisec

Parsing portalhelper_grammartest.txt
  Time elapsed:  0 millisec
  Nodes found:   56
INTERNAL ERROR: An internal error in Grammatica has been found.
    Please report this error to the maintainers (see the web
    site for instructions). Be sure to include the Grammatica
    version number, as well as the information below:

java.lang.ArithmeticException: / by zero
        at
net.percederberg.grammatica.Grammatica.profile(Grammatica.java:547)
        at net.percederberg.grammatica.Grammatica.main(Grammatica.java:175)

<snap>

It's obviously a problem with the time-elapsed-value of Zero, isn't it?
Increasing the file-size of my test-file cranked it up to 60 millisecs
and no error. Just thought I'd let you know (who would ever expect that
modern computers are _that_ fast :-))

OT: Your hint in one of the previous posts about using "--tokenize" etc.
to debug the grammar was very helpfull. As was your hint to first define
all the tokens and only after that the productions. Maybe you could put
this sort of information in a more prominent place (like the docs)?

Stefan