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rsc opened this issue Jan 30, 2019 · 22 comments
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cmd/vet: update for new number formats #29986

rsc opened this issue Jan 30, 2019 · 22 comments
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FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done. release-blocker
Milestone
Go1.15

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@rsc
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rsc commented Jan 30, 2019

cmd/vet once again lives outside the main tree (sigh).

We need to remember to update the printf checker for
the new formats %#b and %O on integers, %x on float/complex.
@rsc rsc added this to the Go1.13 milestone Jan 30, 2019
@gopherbot
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Change https://golang.org/cl/160246 mentions this issue: fmt: format 0b, 0o prefixes in %#b and %O

@gopherbot
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Change https://golang.org/cl/160245 mentions this issue: fmt: format hex floats and complexes

@andybons andybons added the NeedsFix The path to resolution is known, but the work has not been done. label Feb 6, 2019
gopherbot pushed a commit that referenced this issue Feb 26, 2019
@rsc
fmt: format hex floats and complexes
e1a6d1f 
This CL modifies fmt's printer to implement %x and %X
for formatting floating-point data (floats and complexes)
in standard hexadecimal notation.

See golang.org/design/19308-number-literals for background.

For #29008.
Vet update is #29986.

Change-Id: If2842a11631bc393a1ebcf6914ed07658652af5a
Reviewed-on: https://go-review.googlesource.com/c/160245
Reviewed-by: Robert Griesemer <[email protected]>
Reviewed-by: Rob Pike <[email protected]>
gopherbot pushed a commit that referenced this issue Feb 26, 2019
@rsc
fmt: format 0b, 0o prefixes in %#b and %O
ac51237 
This CL modifies fmt's printer to implement %#b and %O
to emit leading 0b and 0o prefixes on binary and octal.
(%#o is already taken and emits "0377"; %O emits "0o377".)

See golang.org/design/19308-number-literals for background.

For #19308.
For #12711.
Vet update is #29986.

Change-Id: I7c38a4484c48a03abe9f6d45c7d981c7c314f583
Reviewed-on: https://go-review.googlesource.com/c/160246
Reviewed-by: Robert Griesemer <[email protected]>
Reviewed-by: Rob Pike <[email protected]>
@andybons andybons modified the milestones: Go1.13, Go1.14 Jul 8, 2019
@rsc rsc modified the milestones: Go1.14, Backlog Oct 9, 2019
@seh
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seh commented Dec 21, 2019

It looks like vet's update for the new octal format verb 'O' would go here.

@toothrot toothrot mentioned this issue Jan 7, 2020
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@gopherbot
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Change https://golang.org/cl/235100 mentions this issue: go/analysis/passes/printf: allow %O in format strings

gopherbot pushed a commit to golang/tools that referenced this issue May 26, 2020
@michael-schaller @ianlancetaylor
go/analysis/passes/printf: allow %O in format strings
8b020ae 
%O is supported since Go 1.13. See golang.org/design/19308-number-literals for
the background.

Support for %O has been added by copying and adapting the %o implementation.

Updates golang/go#29986

Change-Id: Ic49d3cc8d9aefcc0ecbfcfe5ebf206e6f951d413
Reviewed-on: https://go-review.googlesource.com/c/tools/+/235100
Run-TryBot: Ian Lance Taylor <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
@michael-schaller
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As far as I can tell this bug should be fixed.

@rsc, could you double check and mark this bug as fixed?
https://github.com/golang/tools/blob/8b020aee10d2dc97e13b76ce01b59c9b5d4a4d0f/go/analysis/passes/printf/printf.go#L790-L819

@michael-schaller
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Also as %O was introduced with Go 1.13 should this be included in the next Go 1.13 and 1.14 point releases?

@ianlancetaylor
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I don't think this is fixed until we import a new version of the packages into the main sources.

@ianlancetaylor

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@ianlancetaylor
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@gopherbot Please open backport issues for 1.13 and 1.14

"go vet" should permit %O in fmt.Printf formats, as the formatting code was added in the 1.13 release.

This was referenced May 27, 2020
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@gopherbot
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Backport issue(s) opened: #39287 (for 1.13), #39288 (for 1.14).

Remember to create the cherry-pick CL(s) as soon as the patch is submitted to master, according to https://golang.org/wiki/MinorReleases.

@michael-schaller
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@ianlancetaylor note that %#b and %x support was added in other changes by other people and these changes would need to be cherry picked as well...

The changes in question are:

@ianlancetaylor
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@michael-schaller True. At a quick glance it seems like those two are fixed in 1.14, but not in 1.13.

@michael-schaller
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@ianlancetaylor please let me know if I can help in some other way with this bug. I'm curious how this is all handled... ;-)

@dmitshur
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dmitshur commented May 29, 2020 •
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The version of the golang.org/x/tools module is specified in the src/cmd/go.mod files on the release branches for Go 1.14 and 1.13:

The release branches in golang.org/x/tools should correspond to those pseudo-versions:

This is already the case for 1.14, but the x/tools release-branch.go1.13 is incorrect (it's many commits ahead) and will need to be reset to match the version selected in https://github.com/golang/go/blob/release-branch.go1.13/src/cmd/go.mod#L11.

Then, it's a matter of backporting the relevant vet fixes to each of the x/tools release branches, and updating the go.mod (and re-running go mod vendor as documented here) accordingly on the main Go release branches.

Given it's quite a bit of mechanics, it's likely a good idea to wait until the backport issues (#39288 and #39287) make progress from their current CherryPickCandidate state before starting the work.

@dmitshur dmitshur modified the milestones: Backlog, Go1.15 Jun 2, 2020
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dmitshur commented Jun 2, 2020

The backport issues have been approved.

I'll also add release-blocker to this to track the vendor of CL 235100 into the main tree.

@dmitshur dmitshur self-assigned this Jun 2, 2020
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Change https://golang.org/cl/236138 mentions this issue: cmd: update golang.org/x/tools to v0.0.0-20200601175630-2caf76543d99

@dmitshur dmitshur removed their assignment Jun 2, 2020
@ianlancetaylor
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@dmitshur Sorry, didn't notice that you had assigned this to yourself.

@dmitshur
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dmitshur commented Jun 2, 2020

@ianlancetaylor That is not a problem. I noticed you've sent the CL thanks to gopherbot's message above just before I started doing any work. I reviewed your CL. Thank you.

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Change https://golang.org/cl/236161 mentions this issue: [release-branch.go1.14] go/analysis/passes/printf: allow %O in format strings

gopherbot pushed a commit to golang/tools that referenced this issue Jun 2, 2020
@michael-schaller @dmitshur
[release-branch.go1.14] go/analysis/passes/printf: allow %O in format…
c00d67e 
… strings

%O is supported since Go 1.13. See golang.org/design/19308-number-literals for
the background.

Support for %O has been added by copying and adapting the %o implementation.

For golang/go#39288.
For golang/go#29986.

Change-Id: Ic49d3cc8d9aefcc0ecbfcfe5ebf206e6f951d413
Reviewed-on: https://go-review.googlesource.com/c/tools/+/235100
Run-TryBot: Ian Lance Taylor <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
(cherry picked from commit 8b020ae)
Reviewed-on: https://go-review.googlesource.com/c/tools/+/236161
Run-TryBot: Dmitri Shuralyov <[email protected]>
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Change https://golang.org/cl/236199 mentions this issue: [release-branch.go1.14] cmd: update golang.org/x/tools to v0.0.0-20200602230032-c00d67ef29d0

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Change https://golang.org/cl/237945 mentions this issue: [release-branch.go1.13] go/analysis/passes/printf: allow %O in format strings

gopherbot pushed a commit to golang/tools that referenced this issue Jun 15, 2020
@michael-schaller @dmitshur
[release-branch.go1.13] go/analysis/passes/printf: allow %O in format…
991d59a 
… strings

%O is supported since Go 1.13. See golang.org/design/19308-number-literals for
the background.

Support for %O has been added by copying and adapting the %o implementation.

Updates golang/go#29986.
For golang/go#39287.

Change-Id: Ic49d3cc8d9aefcc0ecbfcfe5ebf206e6f951d413
Reviewed-on: https://go-review.googlesource.com/c/tools/+/235100
Run-TryBot: Ian Lance Taylor <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Reviewed-on: https://go-review.googlesource.com/c/tools/+/237945
Run-TryBot: Dmitri Shuralyov <[email protected]>
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Change https://golang.org/cl/238018 mentions this issue: [release-branch.go1.13] cmd: update golang.org/x/tools to v0.0.0-20200615191743-991d59a616de

gopherbot pushed a commit that referenced this issue Jun 15, 2020
@dmitshur
[release-branch.go1.14] cmd: update golang.org/x/tools to v0.0.0-2020…
e98cafa 
…0602230032-c00d67ef29d0

This teaches vet to recognize %O in a fmt.Printf format string.
O has been supported since the 1.13 release, but vet would warn about it.

Fixes #39288.
For #29986.

Change-Id: Ia7817ee60ae6beac32cc402c0c68afa917e4ef0f
Reviewed-on: https://go-review.googlesource.com/c/go/+/236199
Run-TryBot: Dmitri Shuralyov <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
gopherbot pushed a commit that referenced this issue Jun 15, 2020
@dmitshur
[release-branch.go1.13] cmd: update golang.org/x/tools to v0.0.0-2020…
206ee87 
…0615191743-991d59a616de

This teaches vet to recognize the new formats %#b and %O on integers,
%x on float/complex. They have been supported since the 1.13 release,
but vet would warn about it.

Also update cmd/vet testdata accordingly, as was done in CL 202083.

Fixes #39287.
For #29986.

Change-Id: Ia7817ee60ae6beac32cc402c0c68afa917e4ef0f
Reviewed-on: https://go-review.googlesource.com/c/go/+/238018
Run-TryBot: Dmitri Shuralyov <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
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