View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0007021 | GNUnet | NSE service | public | 2021-09-20 10:03 | 2022-02-26 22:18 |
| Reporter | md | Assigned To | Christian Grothoff | Due Date | |
| Priority | low | Severity | tweak | Reproducibility | sometimes |
| Status | closed | Resolution | fixed | ||
| Platform | GNU/Linux | OS | Guix System | OS Version | v??? |
| Product Version | 0.13.0 | ||||
| Summary | 0007021: NSE service sometimes returns stddev=NaN | ||||
| Description | The NSE service sometimes sends estimates wih stddev=NaN. This might or might not be a bug. However, this contradicts the statements in setup_estimate_message, that imply the stddev is a finite positive number (or zero) or positive infinity. if (variance >= 0) std_dev = sqrt (variance); else std_dev = variance; /* must be infinity due to estimate_count == 0 */ As infinity >= 0, this doesn't seem correct. Maybe the comment should be changed to /* must be NaN due to estimate_count == 0 */? | ||||
| Steps To Reproduce | This was detected on an offline peer. Possibly you need to delete ~/.local/share/gnunet/nse/proof.dat (not sure). Not 100% reproducible: I only observed this after the Scheme-GNUnet release. To observe this, run gnunet-nse, or run the "examples/nse-web.scm" script in Scheme-GNUnet and notice the "Scheme-GNUnet: an ill-formed message of type 323 was received’ messages. | ||||
| Tags | No tags attached. | ||||
| Oops it's detected on 0.13.1, not 0.13.0. | |
| Fix committed to master branch. | |
| Ah, interesting catch. The logic above did 0.0/0.0 which is indeed NaN, while the comment reasoning was X/0.0 is "always" INF for all non-negative X. Well, that was almost true ;-). I've debated this with myself, and I think NaN is actually better here. So we'll keep the result at NaN. I've updated the comment in Git Master. | |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2021-09-20 10:03 | md | New Issue | |
| 2021-09-20 10:06 | md | Note Added: 0018399 | |
| 2021-09-22 09:36 | Christian Grothoff | ||
| 2021-09-22 09:36 | Christian Grothoff | Note Added: 0018403 | |
| 2021-09-22 09:36 | Christian Grothoff | Assigned To | => Christian Grothoff |
| 2021-09-22 09:36 | Christian Grothoff | Status | new => resolved |
| 2021-09-22 09:36 | Christian Grothoff | Resolution | open => fixed |
| 2021-09-22 09:40 | Christian Grothoff | Note Added: 0018404 | |
| 2022-02-26 22:18 | schanzen | Status | resolved => closed |