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griesemer opened this issue Sep 17, 2013 · 7 comments
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gccgo: missing declared and not used error #6415

griesemer opened this issue Sep 17, 2013 · 7 comments
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@griesemer
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http://play.golang.org/p/kSqOMI9a_6

Expected output should be along the lines of:

prog.go:4: s declared and not used

But the compiler is silent.

This is an implementation restriction, and a compiler may be free to restrict or not.
That said, given the specification of the restriction, this is not consistent with the
usage checks that gc already does.

We may not be able to fix this since it may invalidate code that is now compiling.
@rsc
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rsc commented Nov 27, 2013

Comment 1:

Labels changed: added go1.3maybe.

@ianlancetaylor
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Comment 2:

Gccgo is not part of Go 1.3.

Labels changed: removed go1.3maybe.

@rsc
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rsc commented Dec 4, 2013

Comment 3:

Labels changed: added repo-gccgo.

@paranoiacblack
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What's the status of this issue? It appears cmd/gc also remains silent in this situation. Is this still a problem?

@ianlancetaylor
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The same issue for the gc compiler is #6414.

@griesemer
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Yes, I'd consider this a bug in gc and gccgo. go/types reports an error.

@paranoiacblack paranoiacblack self-assigned this Jan 13, 2015
@paranoiacblack
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Fixed in gcc.gnu.org/r219916.

hubot pushed a commit to gcc-mirror/gcc that referenced this issue Jan 20, 2015
compiler: Do not mark unused variables as used inside closures.
74751e1 
Fixes golang/go#6415.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@219916 138bc75d-0d04-0410-961f-82ee72b054a4
paranoiacblack pushed a commit to golang/gofrontend that referenced this issue Jan 27, 2015
compiler: Do not mark unused variables as used inside closures.
be2a33b 
Fixes golang/go#6415.

LGTM=iant
R=iant
CC=gofrontend-dev
https://codereview.appspot.com/195060043

Committer: Ian Lance Taylor <[email protected]>
paranoiacblack pushed a commit to golang/gofrontend that referenced this issue Jun 2, 2015
@ianlancetaylor
compiler: Do not mark unused variables as used inside closures.
f1896f0 
Fixes golang/go#6415.

LGTM=iant
R=iant
CC=gofrontend-dev
https://golang.org/cl/195060043
mwhudson added a commit to mwhudson/juju that referenced this issue Dec 14, 2015
@mwhudson
fix api/metricsadder & apiserver/environment test compilation with ne…
cff2cb9 
…w gccgo

gccgo (in xenial at least) is stricter than gc when it comes to a certain
class of declared but not used variable, see:

    golang/go#6415
    golang/go#3059
jujubot added a commit to juju/juju that referenced this issue Dec 15, 2015
@jujubot
Merge pull request #3961 from mwhudson/metricsadder-vars
f81ca41 
fix api/metricsadder & apiserver/environment test compilation with ne…

…w gccgo

gccgo (in xenial at least) is stricter than gc when it comes to a certain
class of declared but not used variable, see:

    golang/go#6415
    golang/go#3059
@golang golang locked and limited conversation to collaborators Jun 25, 2016
asiekierka pushed a commit to WonderfulToolchain/gcc-ia16 that referenced this issue May 16, 2022
compiler: Do not mark unused variables as used inside closures.
2d8536f 
Fixes golang/go#6415.

From-SVN: r219916
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@rsc @paranoiacblack @ianlancetaylor @griesemer @gopherbot