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+++ b/pages/menu/bugs.md	Tue Sep 15 14:55:06 2020 +0900
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+---
+layout: page
+title: Bugs
+menu: true
+permalink: bugs
+---
+
+GNU Octave uses the bug tracker at [Savannah]({{ site.bugs_url }}).
+There you can [report a new bug]({{ site.bugs_url }}&func=additem),
+[browse recent bugs]({{ site.bugs_url }}),
+or [search for bugs]({{ site.bugs_url }}&func=search).
+
+### Guidelines for reporting a new bug
+
+1. **Is the bug already known?**
+
+   - [Search for already reported bugs at the bug tracker]({{ site.bugs_url }}&func=search),
+   - look at the
+     [list of known causes of trouble]({{ site.docs_url }}/Trouble.html)
+     in the Octave manual.
+
+   <p></p>
+
+   If you your problem **does not appear** to be known,
+   then you should report the problem.
+
+2. **Is it really a bug?**
+
+   - If Octave **crashes**, for any input whatever, that is a bug.
+     Reliable interpreters never crash.
+   - If Octave produces **incorrect results**, for any input whatever,
+     that is a bug.
+   - If Octave produces an **error message** for **valid input**, that is a bug.
+   - If Octave produces **no error message** for **invalid input**,
+     that is a bug.
+
+   <p></p>
+
+3. **Missing function in Octave**
+
+   - If the function is
+     [part of some Octave Forge package]({{ site.sourceforge_url }}/functions_by_alpha.php),
+     this is **not** a bug.
+   - If the function **exists in Matlab**,
+     but **not in core Octave** and **not in Octave Forge packages**,
+     that is a bug.
+
+   <p></p>
+
+   It might take several months or years until for new features to become part
+   of Octave, consider
+   [commercial support]({{ "commercial-support.html" | relative_url }})
+   if you don't want to wait that long).
+
+4. **Make your bug report count**
+
+   - **Report all the facts:**<br>
+     Include all information that make it possible to fix the bug.
+     If you are not sure whether to state a fact or leave it out, state it.
+     This information includes your **operating system**, **Octave version**,
+     **exact error message** or **exact output**.
+   - **Give a short, specific, complete example:**<br>
+     Avoid: pseudocode, uninitialized variables,
+     calls to unattached scripts or functions.
+   - **Justify your exectations briefly:**<br>
+     Although it might seem obvious to you,
+     someone examining the problem might not know what result you consider
+     correct.
+
+
+### Sending Patches for Octave
+
+If you have a suggested fix for a bug,
+please attach it to your report in the tracker.
+Your patch is more likely to be reviewed if you follow the guidelines from the
+Octave Wiki about the [creation of changesets]({{ site.wiki_url }}/Mercurial).