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encoding/binary: imprecise error for pointer to pointer #6818

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dominikh opened this issue Nov 22, 2013 · 7 comments
Closed

encoding/binary: imprecise error for pointer to pointer #6818

dominikh opened this issue Nov 22, 2013 · 7 comments
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Go1.4

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@dominikh
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Before filing a bug, please check whether it has been fixed since the
latest release. Search the issue tracker and check that you're running the
latest version of Go:

Run "go version" and compare against
http://golang.org/doc/devel/release.html  If a newer version of Go exists,
install it and retry what you did to reproduce the problem.

Thanks.

What steps will reproduce the problem?
If possible, include a link to a program on play.golang.org.
1. http://play.golang.org/p/mAEsGMOdEi
2.
3.

What is the expected output?
binary.Read: invalid type main.S
<nil>
binary.Read: invalid type **main.S

What do you see instead?
binary.Read: invalid type main.S
<nil>
binary.Read: invalid type *main.S

Which compiler are you using (5g, 6g, 8g, gccgo)?


Which operating system are you using?


Which version are you using?  (run 'go version')
go version devel +341a490e4736 Fri Nov 08 11:31:44 2013 -0500 linux/amd64

Please provide any additional information below.
When accidentally passing a double pointer to binary.Read, the error only mentions a
single pointer. This might cause the user to search for the error elsewhere (such as the
struct definition itself).
@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 dadkins@google.com:

This looks like it could be fixed by fixing the error message. Mind if I try?

@griesemer
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Comment 5:

Labels changed: added release-go1.4, removed priority-triage, release-none.

Owner changed to @griesemer.

Status changed to Started.

@gopherbot
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Comment 6:

CL https://golang.org/cl/149290045 mentions this issue.

@griesemer
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Comment 7:

This issue was closed by revision 1dba6eb.

Status changed to Fixed.

@rsc rsc added this to the Go1.4 milestone Apr 14, 2015
@rsc rsc removed the release-go1.4 label Apr 14, 2015
@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
@griesemer @wheatman
encoding/binary: fix error message
b2d5b45 
In the process, simplified internal sizeOf and
dataSize functions. Minor positive impact on
performance. Added test case.

benchmark                         old ns/op     new ns/op     delta
BenchmarkReadSlice1000Int32s      14006         14122         +0.83%
BenchmarkReadStruct               2508          2447          -2.43%
BenchmarkReadInts                 921           928           +0.76%
BenchmarkWriteInts                2086          2081          -0.24%
BenchmarkWriteSlice1000Int32s     13440         13497         +0.42%
BenchmarkPutUvarint32             28.5          26.3          -7.72%
BenchmarkPutUvarint64             81.3          76.7          -5.66%

benchmark                         old MB/s     new MB/s     speedup
BenchmarkReadSlice1000Int32s      285.58       283.24       0.99x
BenchmarkReadStruct               27.90        28.60        1.03x
BenchmarkReadInts                 32.57        32.31        0.99x
BenchmarkWriteInts                14.38        14.41        1.00x
BenchmarkWriteSlice1000Int32s     297.60       296.36       1.00x
BenchmarkPutUvarint32             140.55       151.92       1.08x
BenchmarkPutUvarint64             98.36        104.33       1.06x

Fixes golang#6818.

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/149290045
wheatman pushed a commit to wheatman/go-akaros that referenced this issue Jun 26, 2018
@griesemer @wheatman
encoding/binary: fix error message
8c5c2d7 
In the process, simplified internal sizeOf and
dataSize functions. Minor positive impact on
performance. Added test case.

benchmark                         old ns/op     new ns/op     delta
BenchmarkReadSlice1000Int32s      14006         14122         +0.83%
BenchmarkReadStruct               2508          2447          -2.43%
BenchmarkReadInts                 921           928           +0.76%
BenchmarkWriteInts                2086          2081          -0.24%
BenchmarkWriteSlice1000Int32s     13440         13497         +0.42%
BenchmarkPutUvarint32             28.5          26.3          -7.72%
BenchmarkPutUvarint64             81.3          76.7          -5.66%

benchmark                         old MB/s     new MB/s     speedup
BenchmarkReadSlice1000Int32s      285.58       283.24       0.99x
BenchmarkReadStruct               27.90        28.60        1.03x
BenchmarkReadInts                 32.57        32.31        0.99x
BenchmarkWriteInts                14.38        14.41        1.00x
BenchmarkWriteSlice1000Int32s     297.60       296.36       1.00x
BenchmarkPutUvarint32             140.55       151.92       1.08x
BenchmarkPutUvarint64             98.36        104.33       1.06x

Fixes golang#6818.

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/149290045
wheatman pushed a commit to wheatman/go-akaros that referenced this issue Jul 9, 2018
@griesemer @wheatman
encoding/binary: fix error message
18aa689 
In the process, simplified internal sizeOf and
dataSize functions. Minor positive impact on
performance. Added test case.

benchmark                         old ns/op     new ns/op     delta
BenchmarkReadSlice1000Int32s      14006         14122         +0.83%
BenchmarkReadStruct               2508          2447          -2.43%
BenchmarkReadInts                 921           928           +0.76%
BenchmarkWriteInts                2086          2081          -0.24%
BenchmarkWriteSlice1000Int32s     13440         13497         +0.42%
BenchmarkPutUvarint32             28.5          26.3          -7.72%
BenchmarkPutUvarint64             81.3          76.7          -5.66%

benchmark                         old MB/s     new MB/s     speedup
BenchmarkReadSlice1000Int32s      285.58       283.24       0.99x
BenchmarkReadStruct               27.90        28.60        1.03x
BenchmarkReadInts                 32.57        32.31        0.99x
BenchmarkWriteInts                14.38        14.41        1.00x
BenchmarkWriteSlice1000Int32s     297.60       296.36       1.00x
BenchmarkPutUvarint32             140.55       151.92       1.08x
BenchmarkPutUvarint64             98.36        104.33       1.06x

Fixes golang#6818.

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/149290045
wheatman pushed a commit to wheatman/go-akaros that referenced this issue Jul 30, 2018
@griesemer @wheatman
encoding/binary: fix error message
50b4843 
In the process, simplified internal sizeOf and
dataSize functions. Minor positive impact on
performance. Added test case.

benchmark                         old ns/op     new ns/op     delta
BenchmarkReadSlice1000Int32s      14006         14122         +0.83%
BenchmarkReadStruct               2508          2447          -2.43%
BenchmarkReadInts                 921           928           +0.76%
BenchmarkWriteInts                2086          2081          -0.24%
BenchmarkWriteSlice1000Int32s     13440         13497         +0.42%
BenchmarkPutUvarint32             28.5          26.3          -7.72%
BenchmarkPutUvarint64             81.3          76.7          -5.66%

benchmark                         old MB/s     new MB/s     speedup
BenchmarkReadSlice1000Int32s      285.58       283.24       0.99x
BenchmarkReadStruct               27.90        28.60        1.03x
BenchmarkReadInts                 32.57        32.31        0.99x
BenchmarkWriteInts                14.38        14.41        1.00x
BenchmarkWriteSlice1000Int32s     297.60       296.36       1.00x
BenchmarkPutUvarint32             140.55       151.92       1.08x
BenchmarkPutUvarint64             98.36        104.33       1.06x

Fixes golang#6818.

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/149290045
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@dominikh @rsc @griesemer @gopherbot