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cmd/gc: confusing error message for invalid short variable declaration #6764

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griesemer opened this issue Nov 14, 2013 · 7 comments
Closed

cmd/gc: confusing error message for invalid short variable declaration #6764

griesemer opened this issue Nov 14, 2013 · 7 comments
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@griesemer
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The compiler reports for following program

http://play.golang.org/p/VnyarNdWXk

prog.go:4: undefined: a
prog.go:4: cannot assign to a

which is confusing. Since there is no redeclaration (a is not defined earlier in the
same block), per the spec, this code is exactly equivalent to:

http://play.golang.org/p/iuTKv5kPq8

and thus should lead to an error more along the lines of:

prog.go:4: a redeclared in this block
    previous declaration at prog.go:4
@rsc
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rsc commented Nov 27, 2013

Comment 1:

Labels changed: added go1.3maybe.

@rsc
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rsc commented Dec 4, 2013

Comment 2:

Labels changed: added release-none, removed go1.3maybe.

@rsc
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rsc commented Dec 4, 2013

Comment 3:

Labels changed: added repo-main.

@gopherbot
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Comment 4 by E.Kroske:

I'll take this one.

@griesemer
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Comment 5:

See also related issue #8435.

@gopherbot
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Comment 6:

CL https://golang.org/cl/116440046 mentions this issue.

@rsc
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rsc commented Oct 6, 2014

Comment 7:

This issue was closed by revision 55df81d.

Status changed to Fixed.

@golang golang locked and limited conversation to collaborators Jun 25, 2016
wheatman pushed a commit to wheatman/go-akaros that referenced this issue Jun 25, 2018
@wheatman
cmd/gc: prohibit short variable declarations containing duplicate sym…
c123bea 
…bols

Fixes golang#6764.
Fixes golang#8435.

LGTM=rsc
R=golang-codereviews, r, gobot, rsc
CC=golang-codereviews
https://golang.org/cl/116440046
wheatman pushed a commit to wheatman/go-akaros that referenced this issue Jun 26, 2018
@wheatman
cmd/gc: prohibit short variable declarations containing duplicate sym…
5d250fb 
…bols

Fixes golang#6764.
Fixes golang#8435.

LGTM=rsc
R=golang-codereviews, r, gobot, rsc
CC=golang-codereviews
https://golang.org/cl/116440046
wheatman pushed a commit to wheatman/go-akaros that referenced this issue Jul 9, 2018
@wheatman
cmd/gc: prohibit short variable declarations containing duplicate sym…
a4a015f 
…bols

Fixes golang#6764.
Fixes golang#8435.

LGTM=rsc
R=golang-codereviews, r, gobot, rsc
CC=golang-codereviews
https://golang.org/cl/116440046
wheatman pushed a commit to wheatman/go-akaros that referenced this issue Jul 30, 2018
@wheatman
cmd/gc: prohibit short variable declarations containing duplicate sym…
befb1f8 
…bols

Fixes golang#6764.
Fixes golang#8435.

LGTM=rsc
R=golang-codereviews, r, gobot, rsc
CC=golang-codereviews
https://golang.org/cl/116440046
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@rsc @griesemer @gopherbot