Fixes#37272
Change-Id: I6554fd5e5400acb20c5a7e96b1d6cb1a1afb9871
Reviewed-on: https://go-review.googlesource.com/c/go/+/259299
Trust: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Than McIntosh <thanm@google.com>
This is a step toward porting https://golang.org/cl/219817 from the
gofrontend repo to the main repo.
Note that this also corrects the implementation of the v2 mangling
scheme to use ..u and ..U where appropriate.
For #37272
Change-Id: I64a1e7ca1c84348efcbf1cf62049eeb05c830ed8
Reviewed-on: https://go-review.googlesource.com/c/go/+/259298
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Than McIntosh <thanm@google.com>
Most of the cmd/go tests build the cmd/go binary and run that binary to
test it, but TestAbsolutePath used the GOROOT's cmd/go instead, which
makes debugging confusing and means that make.bash has to be run in each
iteration cycle. Update TestAbsolutePath to use the same go binary as
the rest of the cmd/go tests.
Change-Id: Ib4e8ae707b66f1f75ceb346b98358f5604fd28c1
Reviewed-on: https://go-review.googlesource.com/c/go/+/256979
Trust: Michael Matloob <matloob@golang.org>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
It is tested on darwin/arm64. Don't lose it when using GOOS=ios.
Updates #38485.
Change-Id: I7157d6b6f2850f2fd361e35ae310dd1ba9f31aa4
Reviewed-on: https://go-review.googlesource.com/c/go/+/259439
Trust: Cherry Zhang <cherryyz@google.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
ARM64 used to require that all assembly frame sizes were of the form
16*N+8 because ARM64 requires 16-byte SP alignment and the assembler
added an 8 byte LR slot. This made all of the runtime.call* frame
sizes wonky. The assembler now rounds up the frame size appropriately
after adding any additional slots it needs, so this is no longer
necessary.
This CL cleans up the frame sizes of these functions so they look the
way you'd expect and match all other architectures.
Change-Id: I47819092296b8983c43eadf2e66c7c1e0d518555
Reviewed-on: https://go-review.googlesource.com/c/go/+/259448
Trust: Austin Clements <austin@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Currently, runtime.call16 is defined and used only on 32-bit
architectures, while 64-bit architectures all start at call32 and go
up from there. This led to unnecessary complexity because call16's
prototype needed to be in a different file, separate from all of the
other call* prototypes, which in turn led to it getting out of sync
with the other call* prototypes. This CL adds call16 on 64-bit
architectures, bringing them all into sync, and moves the call16
prototype to live with the others.
Prior to CL 31655 (in 2016), call16 couldn't be implemented on 64-bit
architectures because it needed at least four words of argument space
to invoke "callwritebarrier" after copying back the results. CL 31655
changed the way call* invoked the write barrier in preparation for the
hybrid barrier; since the hybrid barrier had to be invoked prior to
copying back results, it needed a different solution that didn't reuse
call*'s stack space. At this point, call16 was no longer a problem on
64-bit, but we never added it. Until now.
Change-Id: Id10ade0e4f75c6ea76afa6229ddaee2b994c27dd
Reviewed-on: https://go-review.googlesource.com/c/go/+/259339
Trust: Austin Clements <austin@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
The signature of call16 is currently missing the "typ" parameter. This
CL fixes this. This wasn't caught by vet because call16 is defined by
macro expansion (see #17544), and we didn't notice the mismatch with
the other call* functions because call16 is defined only on 32-bit
architectures and lives alone in stubs32.go.
Unfortunately, this means its GC signature is also wrong: the "arg"
parameter is treated as a scalar rather than a pointer, so GC won't
trace it and stack copying won't adjust it. This turns out to matter
in exactly one case right now: on 32-bit architectures (which are the
only architectures where call16 is defined), a stack-allocated defer
of a function with a 16-byte or smaller argument frame including a
non-empty result area can corrupt memory if the deferred function
grows the stack and is invoked during a panic. Whew. All other current
uses of reflectcall pass a heap-allocated "arg" frame (which happens
to be reachable from other stack roots, so tracing isn't a problem).
Curiously, in 2016, the signatures of all call* functions were wrong
in exactly this way. CL 31654 fixed all of them in stubs.go, but
missed the one in stubs32.go.
Fixes#41795.
Change-Id: I31e3c0df201f79ee5707eeb8dc4ff0d13fc10ada
Reviewed-on: https://go-review.googlesource.com/c/go/+/259338
Trust: Austin Clements <austin@google.com>
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This change clarifies the usage of the SET type name suffix. Previously
the documentation was somewhat confusing about where the suffix should
be used, and when used what it applied to. For instance the previous
language could be interpreted such that []exampleSET would be parsed as
a SEQUENCE OF SET, which is incorrect as the SET suffix only applies to
slice types, such as type exampleSET []struct{} which is parsed as a
SET OF SEQUENCE.
Change-Id: I74201d9969f931f69391c236559f66cb460569ec
GitHub-Last-Rev: d0d2ddc587
GitHub-Pull-Request: golang/go#38543
Reviewed-on: https://go-review.googlesource.com/c/go/+/229078
Trust: Roland Shoemaker <roland@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Change-Id: I247fc9e0e26e706e6af07367f953eaa1b7e544c1
Reviewed-on: https://go-review.googlesource.com/c/go/+/259577
Trust: Elias Naur <mail@eliasnaur.com>
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Add a case for gohostos == "ios" along with "darwin".
Updates #38485.
Change-Id: Ic7310e6c97d405f78a5e5db1a639860455e61327
Reviewed-on: https://go-review.googlesource.com/c/go/+/259337
Trust: Cherry Zhang <cherryyz@google.com>
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Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
There are no tethered iOS builders left, and should they appear in
the future, they should use all.bash.
Change-Id: I3217789514ffa725e4d2584e4991d899c5fda995
Reviewed-on: https://go-review.googlesource.com/c/go/+/259278
Trust: Elias Naur <mail@eliasnaur.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Update the README to mention the emulator. Remove reference to gomobile
while here; there are multiple ways to develop for iOS today, including
using the c-archive buildmode directly.
Updates #38485
Change-Id: Iccef75e646ea8e1b9bc3fc37419cc2d6bf3dfdf4
Reviewed-on: https://go-review.googlesource.com/c/go/+/255257
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Update #40995
Change-Id: I2cf9b85a960f479eaa59bf58081d03a0467bc2b8
Reviewed-on: https://go-review.googlesource.com/c/go/+/250582
Trust: Joel Sing <joel@sing.id.au>
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This change renames mustHeapAlloc to heapAllocReason, and changes it
to return the reason why the argument must escape, so we don't have to
re-deduce it in its callers just to print the escape reason. It also
embeds isSmallMakeSlice body in heapAllocReason, since the former was
only used by the latter, and deletes isSmallMakeSlice.
An outdated TODO to remove smallintconst, which the TODO claimed was
only used in one place, was also removed, since grepping shows we
currently call smallintconst in 11 different places.
Change-Id: I0bd11bf29b92c4126f5bb455877ff73217d5a155
Reviewed-on: https://go-review.googlesource.com/c/go/+/258678
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
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Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
The documentation on how cgo callbacks (C -> Go calls) works
internally has gotten somewhat stale. This CL refreshes it.
Change-Id: I1ab66225c9da52d698d97ebeb4f3c7b9b5ee97db
Reviewed-on: https://go-review.googlesource.com/c/go/+/258937
Trust: Austin Clements <austin@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
netbsd/arm64 now complies with all the requirements for a port as
specified on https://golang.org/wiki/PortingPolicy
Note that this was preliminarily announced in the Go 1.13 release notes
(CL 183637) but then removed again due to the port lacking a builder at
that time (CL 192997).
Updates #30824
Change-Id: I2f40fabc84fe9cb699282e6a9d13ed9b64478e36
Reviewed-on: https://go-review.googlesource.com/c/go/+/259277
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
We've seen timeouts of TestTimePprof, but the tracebacks aren't useful
because goroutines are running on other threads. Add GOTRACEBACK=crash
to catch these in the future.
For #41120.
Change-Id: I97318172ef78d0cbab10df5e4ffcbfeadff579e3
Reviewed-on: https://go-review.googlesource.com/c/go/+/258802
Trust: Austin Clements <austin@google.com>
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Handling ast.GenDecls while typechecking is repetitive, and a source of
diffs compared to typechecking using the cmd/compile/internal/syntax
package, which unpacks declaration groups into individual declarations.
Refactor to extract the logic for walking declarations. This introduces
a new AST abstraction: types.decl, which comes at some minor performance
cost. However, if we are to fully abstract the AST we will be paying
this cost anyway, and benchmarking suggests that the cost is negligible.
Change-Id: If73c30c3d08053ccf7bf21ef886f0452fdbf142e
Reviewed-on: https://go-review.googlesource.com/c/go/+/256298
Run-TryBot: Robert Findley <rfindley@google.com>
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there is no need to declare a error variable here.
Change-Id: I9ea5bcf568d800efed19c90caf751aaf9abe5555
GitHub-Last-Rev: 538d1f9cee
GitHub-Pull-Request: golang/go#41751
Reviewed-on: https://go-review.googlesource.com/c/go/+/259037
Reviewed-by: Rob Pike <r@golang.org>
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Since GO386=387 is no longer supported, this change deletes a cmd/go
test checking that building something with GO386=387, and then with
sse2, invalidated the build cache.
Fixes the longtest builders.
Change-Id: I5f645ef4ddf1cddb26dcf9390cee94907fc45a70
Reviewed-on: https://go-review.googlesource.com/c/go/+/259017
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
My last 387 CL. So sad ... ... ... ... not!
Fixes#40255
Change-Id: I8d4ddb744b234b8adc735db2f7c3c7b6d8bbdfa4
Reviewed-on: https://go-review.googlesource.com/c/go/+/258957
Trust: Keith Randall <khr@golang.org>
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For #41737
Change-Id: Id065880dd7da54dec1b45662c202aeb7f8397c60
Reviewed-on: https://go-review.googlesource.com/c/go/+/258819
Trust: Ian Lance Taylor <iant@golang.org>
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Previously by default, we extracted modules to a temporary directory,
then renamed it into place. This failed with ERROR_ACCESS_DENIED on
Windows if another process (usually an anti-virus scanner) opened
files in the temporary directory.
Since Go 1.15, users have been able to set
GODEBUG=modcacheunzipinplace=1 to opt into new behavior: we extract
modules at their final location, and we create and later delete a
.partial file to prevent the directory from being used if we crash.
.partial files are recognized by Go 1.14.2 and later.
With this change, the new behavior is the only behavior.
modcacheunzipinplace is no longer recognized.
Fixes#36568
Change-Id: Iff19fca5cd6eaa3597975a69fa05c4cb1b834bd6
Reviewed-on: https://go-review.googlesource.com/c/go/+/258798
Run-TryBot: Jay Conrod <jayconrod@google.com>
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This was useful for debugging failures occurring during make.bash.
The added flush also ensures that any hints in the GOSSAFUNC output
are flushed before fatal exit.
The environment variable GOSSADIR specifies where the SSA html debugging
files should be placed. To avoid collisions, each one is written into
the [package].[functionOrMethod].html, where [package] is the filepath
separator separated package name, function is the function name, and method
is either (*Type).Method, or Type.Method, as appropriate. Directories
are created as necessary to make this work.
Change-Id: I420927426b618b633bb1ffc51cf0f223b8f6d49c
Reviewed-on: https://go-review.googlesource.com/c/go/+/252338
Trust: David Chase <drchase@google.com>
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Not a fix, but things will work while I fix it.
Credit @andybons "for we revert switches for scary stuff".
Updates #41736
Change-Id: I55f90860eae919765aac4f6d9f108a54139027e1
Reviewed-on: https://go-review.googlesource.com/c/go/+/258897
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Currently on 32-bit systems 8-byte fields in a struct have an alignment
of 4 bytes, which means that atomic instructions may fault. This issue
is tracked in #36606.
Our current workaround is to allocate memory and put any such atomically
accessed fields at the beginning of the object. This workaround fails
because the tiny allocator might not align the object right. This case
specifically only happens with 12-byte objects because a type's size is
rounded up to its alignment. So if e.g. we have a type like:
type obj struct {
a uint64
b byte
}
then its size will be 12 bytes, because "a" will require a 4 byte
alignment. This argument may be extended to all objects of size 9-15
bytes.
So, make this workaround work by specifically aligning such objects to 8
bytes on 32-bit systems. This change leaves a TODO to remove the code
once #36606 gets resolved. It also adds a test which will presumably no
longer be necessary (the compiler should enforce the right alignment)
when it gets resolved as well.
Fixes#37262.
Change-Id: I3a34e5b014b3c37ed2e5e75e62d71d8640aa42bc
Reviewed-on: https://go-review.googlesource.com/c/go/+/254057
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
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Trust: Michael Knyszek <mknyszek@google.com>
A recent change to improve shifts was generating some
invalid cases when the rule was based on an AND. The
extended mnemonics CLRLSLDI and CLRLSLWI only allow
certain values for the operands and in the mask case
those values were not being checked properly. This
adds a check to those rules to verify that the
'b' and 'n' values used when an AND was part of the rule
have correct values.
There was a bug in some diag messages in asm9. The
message expected 3 values but only provided 2. Those are
corrected here also.
The test/codegen/shift.go was updated to add a few more
cases to check for the case mentioned here.
Some of the comments that mention the order of operands
in these extended mnemonics were wrong and those have been
corrected.
Fixes#41683.
Change-Id: If5bb860acaa5051b9e0cd80784b2868b85898c31
Reviewed-on: https://go-review.googlesource.com/c/go/+/258138
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Paul Murphy <murp@ibm.com>
Reviewed-by: Carlos Eduardo Seo <carlos.seo@gmail.com>
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Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
This works for "normal" calls.
Defer func() and Go func() still pending.
RT calls still pending.
Change-Id: I29cbdad8c877d12c08bbf7f3f0696611de877da9
Reviewed-on: https://go-review.googlesource.com/c/go/+/247771
Trust: David Chase <drchase@google.com>
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Reviewed-by: Cherry Zhang <cherryyz@google.com>
Includes a few tweaks to Value.copyOf(a) (make it a no-op for
a self-copy) and new pattern hack "___" (3 underscores) is
like ellipsis, except the replacement doesn't need to have
matching ellipsis/underscores.
Moved the arg-length check in generated pattern-matching code
BEFORE the args are probed, because not all instances of
variable length OpFoo will have all the args mentioned in
some rule for OpFoo, and when that happens, the compiler
panics without the early check.
Change-Id: I66de40672b3794a6427890ff96c805a488d783f4
Reviewed-on: https://go-review.googlesource.com/c/go/+/247537
Trust: David Chase <drchase@google.com>
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This change incorporates the decision that it should be possible to
run call expansion relatively late in the optimization chain, so that
(1) calls themselves can be exposed to useful optimizations
(2) the effect of selectors on aggregates is seen at the rewrite,
so that assignment of parts into registers is less complicated
(at least I hope it works that way).
That means that selectors feeding into SelectN need to be processed,
and Make* feeding into call parameters need to be processed.
This does however require that call expansion run before decompose
builtins.
This doesn't yet handle rewrites of strings, slices, interfaces,
and complex numbers.
Passes run.bash and race.bash
Change-Id: I71ff23d3c491043beb30e926949970c4f63ef1a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/245133
Trust: David Chase <drchase@google.com>
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Windows binaries built with -buildmode=c-shared set will have
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE flag set, and
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA flag set for windows/amd64.
ASLR can be disabled on windows by using the new linker -aslr flag.
RELNOTE=yes
Fixes#41421
Change-Id: I62bd88c6d7e0f87173b093a0ad8e1a4d269ec790
Reviewed-on: https://go-review.googlesource.com/c/go/+/255259
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: Alex Brainman <alex.brainman@gmail.com>
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Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
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TestBenchmark doesn't use the -bench flag, so that it can format custom
output -- the number of checked lines per second. This is a barrier both
to discoverability, and to piping benchmark output into analysis tools
such as benchstat.
Using testing.B.ReportMetric and a bit of manual timing, we can achieve
similar results while conforming to normal benchmark output. Do this,
and rename the test func to BenchmarkCheck (for symmetry with
TestCheck).
Change-Id: Ie8f2259c1ca9e6986f0137287acf8eb2843f96b8
Reviewed-on: https://go-review.googlesource.com/c/go/+/257958
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Also add comment explaining why we don't use ignoringEINTR around
call to close.
Fixes#41115
Change-Id: Ia7bbe01eaf26003f70d184b7e82803efef2b2c18
Reviewed-on: https://go-review.googlesource.com/c/go/+/258542
Trust: Ian Lance Taylor <iant@golang.org>
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2 conflicts, that make sense.
src/cmd/internal/obj/objfile.go
src/cmd/link/internal/loader/loader.go
Change-Id: Ib224e2d248cb568fa1e888af79dd908b2f5e05ff
1.Revise ambiguous comments: "all current buckets" means buckets in hmap.buckets, actually current bucket and all the overflow buckets connected to it are full
2.All the pointer address add use src/runtime/stubs.go:add, keep the code style uniform
Change-Id: Idc7224dbe6c391e1b03bf5d009c3734bc75187ce
Reviewed-on: https://go-review.googlesource.com/c/go/+/257979
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Austin Clements <austin@google.com>
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Updates x/net/http2 to git rev 5d4f7005572804eaf7f5ecdd2473a62557f733ba
http2: send WINDOW_UPDATE on a body's write failure
https://golang.org/cl/245158 (fixes#40423)
also updates the vendored version of golang.org/x/net as per
$ go get golang.org/x/net@5d4f700557
$ go mod tidy
$ go mod vendor
$ go generate -run bundle std
For #40423.
Change-Id: I3270d0fb6f28889266596f7365d36d30ef2bb368
Reviewed-on: https://go-review.googlesource.com/c/go/+/258359
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For #26909
For #41688
Change-Id: I22f28d426ce499fce6f0f1295dbde425998042aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/258219
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For #37438
Change-Id: Ie40971ff677d36ddadbf9834bba2d366a0fc34d0
Reviewed-on: https://go-review.googlesource.com/c/go/+/256922
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
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Extends the IA5String encoding restrictions that are currently applied
to name constraints to dNSName, rfc822Name, and
uniformResourceIdentifier elements of the SAN. The utility function
isIA5String is updated to use unicode.MaxASCII rather than utf8.RuneSelf
as it is somewhat more readable.
Certificates that include these badly encoded names do exist, but are
exceedingly rare. zlint and other linters enforce this encoding and
searching censys.io reveals only three currently trusted certificates
with this particular encoding issue.
Fixes#26362
Change-Id: I7a4f3e165a1754e5b4bfaeabc03e01eb7367f3c9
Reviewed-on: https://go-review.googlesource.com/c/go/+/235078
Run-TryBot: Roland Shoemaker <roland@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Roland Shoemaker <roland@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
For #37438
Change-Id: Iae00ef7f97144e85f4f710cdb3087c2548b4b8f0
Reviewed-on: https://go-review.googlesource.com/c/go/+/256799
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
