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cmd/vet: check for misused of append onto new, non-empty slice #6840

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bradfitz opened this issue Nov 27, 2013 · 3 comments
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cmd/vet: check for misused of append onto new, non-empty slice #6840

bradfitz opened this issue Nov 27, 2013 · 3 comments
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Analysis Issues related to static analysis (vet, x/tools/go/analysis) NeedsDecision Feedback is required from experts, contributors, and/or the community before a change can be made.
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@bradfitz
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Request from coworkers:

Govet or lint could warn about appends to slices which were made with a length (but not
a capacity) and had no intervening mutations:

   s := make([]Foo, len(m))   // accidental length; user meant capacity: make([]Foo, 0, len(m))
   for k, v := range m {
      ....
      s = append(s, foo)
   }
@rsc
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rsc commented Dec 4, 2013

Comment 1:

Labels changed: added repo-tools.

@rsc
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rsc commented Mar 3, 2014

Comment 2:

Adding Release=None to all Priority=Someday bugs.

Labels changed: added release-none.

@rsc rsc added this to the Unplanned milestone Apr 10, 2015
@rsc rsc changed the title cmd/govet: check for misused of append onto new, non-empty slice x/tools/cmd/govet: check for misused of append onto new, non-empty slice Apr 14, 2015
@rsc rsc modified the milestones: Unreleased, Unplanned Apr 14, 2015
@rsc rsc removed the repo-tools label Apr 14, 2015
@ALTree ALTree changed the title x/tools/cmd/govet: check for misused of append onto new, non-empty slice cmd/vet: check for misused of append onto new, non-empty slice Aug 10, 2017
@ALTree ALTree added the NeedsDecision Feedback is required from experts, contributors, and/or the community before a change can be made. label Sep 26, 2019
@odeke-em odeke-em self-assigned this Jun 6, 2020
@adonovan adonovan added the Analysis Issues related to static analysis (vet, x/tools/go/analysis) label Apr 23, 2023
@seankhliao
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Duplicate of #69872

@seankhliao seankhliao marked this as a duplicate of #69872 Dec 1, 2024
@seankhliao seankhliao closed this as not planned Won't fix, can't repro, duplicate, stale Dec 1, 2024
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Labels
Analysis Issues related to static analysis (vet, x/tools/go/analysis) NeedsDecision Feedback is required from experts, contributors, and/or the community before a change can be made.
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6 participants