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LLVM Bug Life Cycle
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===================
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.. contents::
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:local:
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Introduction - Achieving consistency in how we deal with bug reports
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====================================================================
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We aim to achieve a basic level of consistency in how reported bugs evolve from
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being reported, to being worked on, and finally getting closed out. The
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consistency helps reporters, developers and others to gain a better
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understanding of what a particular bug state actually means and what to expect
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might happen next.
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At the same time, we aim to not over-specify the life cycle of bugs in the
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`the LLVM Bug Tracking System <https://bugs.llvm.org/enter_bug.cgi>`_, as the
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overall goal is to make it easier to work with and understand the bug reports.
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The main parts of the life cycle documented here are:
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#. `Reporting`_
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#. `Triaging`_
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#. `Actively working on fixing`_
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#. `Closing`_
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Furthermore, some of the metadata in the bug tracker, such as who to notify on
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newly reported bugs or what the breakdown into products & components is we use,
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needs to be maintained. See the following for details:
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#. `Maintenance of Bug products/component metadata`_
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#. `Maintenance of cc-by-default settings`_
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.. _Reporting:
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Reporting bugs
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==============
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See :doc:`HowToSubmitABug` on further details on how to submit good bug reports.
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Make sure that you have one or more people on cc on the bug report that you
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think will react to it. We aim to automatically add specific people on cc for
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most products/components, but may not always succeed in doing so.
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If you know the area of LLVM code the root cause of the bug is in, good
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candidates to add as cc may be the same people you'd ask for a code review in
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that area. See :ref:`finding-potential-reviewers` for more details.
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.. _Triaging:
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Triaging bugs
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=============
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Bugs with status NEW indicate that they still need to be triaged.
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When triage is complete, the status of the bug is moved to CONFIRMED.
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The goal of triaging a bug is to make sure a newly reported bug ends up in a
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good, actionable, state. Try to answer the following questions while triaging.
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* Is the reported behavior actually wrong?
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* E.g. does a miscompile example depend on undefined behavior?
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* Can you easily reproduce the bug?
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* If not, are there reasonable excuses why it cannot easily be reproduced?
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* Is it related to an already reported bug?
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* Use the "See also"/"depends on"/"blocks" fields if so.
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* Close it as a duplicate if so, pointing to the issue it duplicates.
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* Are the following fields filled in correctly?
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* Product
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* Component
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* Title
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* CC others not already cc’ed that you happen to know would be good to pull in.
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* Add the "beginner" keyword if you think this would be a good bug to be fixed
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by someone new to LLVM.
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.. _Actively working on fixing:
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Actively working on fixing bugs
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===============================
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Please remember to assign the bug to yourself if you're actively working on
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fixing it and to unassign it when you're no longer actively working on it. You
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unassign a bug by setting the Assignee field to "unassignedbugs@nondot.org".
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.. _Closing:
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Resolving/Closing bugs
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======================
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For simplicity, we only have 1 status for all resolved or closed bugs:
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RESOLVED.
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Resolving bugs is good! Make sure to properly record the reason for resolving.
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Examples of reasons for resolving are:
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* Revision NNNNNN fixed the bug.
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* The bug cannot be reproduced with revision NNNNNN.
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* The circumstances for the bug don't apply anymore.
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* There is a sound reason for not fixing it (WONTFIX).
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* There is a specific and plausible reason to think that a given bug is
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otherwise inapplicable or obsolete.
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* One example is an old open bug that doesn't contain enough information to
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clearly understand the problem being reported (e.g. not reproducible). It is
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fine to resolve such a bug e.g. with resolution WORKSFORME and leaving a
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comment to encourage the reporter to reopen the bug with more information
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if it's still reproducible on their end.
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If a bug is resolved, please fill in the revision number it was fixed in in the
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"Fixed by Commit(s)" field.
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.. _Maintenance of Bug products/component metadata:
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Maintenance of products/components metadata
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===========================================
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Please raise a bug against "Bugzilla Admin"/"Products" to request any changes
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to be made to the breakdown of products & components modeled in Bugzilla.
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.. _Maintenance of cc-by-default settings:
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Maintenance of cc-by-default settings
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=====================================
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Please raise a bug against "Bugzilla Admin"/"Products" to request any changes
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to be made to the cc-by-default settings for specific components.
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