When -covermode is set to atomic, instrumented packages need to import
sync/atomic. If this is not already imported by a package being
instrumented, the build needs to ensure that sync/atomic is compiled
whenever 'go list' is run in a way that triggers package builds.
The build config was already being made to ensure the import, but only
after the action graph had been created, so there was no guarantee that
sync/atomic would be built when needed.
Fixes#65264.
Change-Id: Ib3f1e102ce2ef554ea08330d9db69a8c98790ac5
Reviewed-on: https://go-review.googlesource.com/c/go/+/560236
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
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Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
Currently there are a few places where a P can get stolen where the
runtime doesn't traceAcquire and traceRelease across the steal itself.
What can happen then is the following scenario:
- Thread 1 enters a syscall and writes an event about it.
- Thread 2 steals Thread 1's P.
- Thread 1 exits the syscall and writes one or more events about it.
- Tracing ends (trace.gen is set to 0).
- Thread 2 checks to see if it should write an event for the P it just
stole, sees that tracing is disabled, and doesn't.
This results in broken traces, because there's a missing ProcSteal
event. The parser always waits for a ProcSteal to advance a
GoSyscallEndBlocked event, and in this case, it never comes.
Fixes#65181.
Change-Id: I437629499bb7669bf7fe2fc6fc4f64c53002916b
Reviewed-on: https://go-review.googlesource.com/c/go/+/560235
Reviewed-by: Michael Pratt <mpratt@google.com>
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Currently the trace map is cleared with an assignment, but this ends up
invoking write barriers. Theoretically, write barriers could try to
write a trace event and eventually try to acquire the same lock. The
static lock ranking expresses this constraint.
This change replaces the assignment with a call to memclrNoHeapPointer
to clear the map, removing the write barriers.
Note that technically this problem is purely theoretical. The way the
trace maps are used today is such that reset is only ever called when
the tracer is no longer writing events that could emit data into a map.
Furthermore, reset is never called from an event-writing context.
Therefore another way to resolve this is to simply not hold the trace
map lock over the reset operation. However, this makes the trace map
implementation less robust because it needs to be used in a very
specific way. Furthermore, the rest of the trace map code avoids write
barriers already since its internal structures are all notinheap, so
it's actually more consistent to just avoid write barriers in the reset
method.
Fixes#56554.
Change-Id: Icd86472e75e25161b2c10c1c8aaae2c2fed4f67f
Reviewed-on: https://go-review.googlesource.com/c/go/+/560216
Reviewed-by: Michael Pratt <mpratt@google.com>
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Currently the flight recorder tests are failing in race mode because the
race detector doesn't see s.lock, leading to false positives. This has
also appeared in the trace tests. Model the lock in the race detector.
Fixes#65207.
Fixes#65283.
Change-Id: I1e9a5c9606536f55fdfc46b5f8443e9c7213c23d
Reviewed-on: https://go-review.googlesource.com/c/go/+/560215
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Reviewed-by: Michael Pratt <mpratt@google.com>
Currently the stop reason for runtime.Gosched is labeled
"runtime.GoSched" which doesn't actually match the function name. Fix
the label to match the function name.
This change doesn't regenerate the internal/trace/v2 tests, because
regenerating the tests breaks summarization tests in internal/trace that
rely on very specific details in the example traces that aren't
guaranteed. Also, go122-gc-trace.test isn't generated at all, as it
turns out. I'll fix this all up in a follow-up CL. For now, just replace
runtime.GoSched with runtime.Gosched in the traces so we don't have a
problem later if a test wants to look for that string.
This change does regenerate the cmd/trace/v2 test, but it turns out the
cmd/trace/v2 tests are way too strict about network unblock events, and
3 usually pop up instead of 1 or 2, which is what the test expects.
AFAICT this looks plausible to me, so just lift the restriction on
"up to 2" events entirely.
Change-Id: Id7350132be19119c743c259f2f5250903bf41a04
Reviewed-on: https://go-review.googlesource.com/c/go/+/552275
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Reviewed-by: Michael Pratt <mpratt@google.com>
This limits the throughput and resource consumption of the fuzz
workers in the tests, which also reduces the likelihood of running out
of address space in the fuzz coordinator during the test.
(Ideally the coordinator should not be limited by address space;
this just works around the failure mode in the tests for now.)
For #65434.
Change-Id: I3086c6278d6803a3dbf17a46ed01b68cedc92ad9
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It is currently not possible to distinguish between a netpollBreak
entry and an entry initiated by external WSA operations (as in #58870).
This CL sets a unique completion key when posting the
netpollBreak entry so that it can be identified as such.
Change-Id: I8e74a7ddc607dc215d6ed8c59d5c3cf47ec8dc62
Reviewed-on: https://go-review.googlesource.com/c/go/+/558895
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Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
This reverts CL 546135.
Reason for revert: Causes occasional throw during panic
For #65416.
Change-Id: I78c15637da18f85ede785363b777aa7d1dead3c3
Reviewed-on: https://go-review.googlesource.com/c/go/+/560455
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
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internal/profile.Parse is only used in two places: cmd/compile for
parsing PGO profiles, and net/http/pprof for parsing runtime/pprof
profiles for delta profiles. Neither case ever encounters legacy
profiles, so we can remove support entirely from the package.
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest
Change-Id: Ic5f85b3fc1e1367131b6039dac9378913cbf9f2c
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It's a new package in the standard library,
not a minor change to an existing package.
For #62039.
For #61422.
Change-Id: I7488304cd2bd6353f535cab192d015796840ba4e
Reviewed-on: https://go-review.googlesource.com/c/go/+/559799
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
The term "memory leak" was misused here, as the memory is still referenced
by the slice.
Fixes#65403
Change-Id: Id102419d4c798fb2a4ec8be86be9ec9b5cdd98e6
GitHub-Last-Rev: 3febcd0ba4
GitHub-Pull-Request: golang/go#65404
Reviewed-on: https://go-review.googlesource.com/c/go/+/559775
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Keith Randall <khr@google.com>
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Per the discussion on the issue, make methods that depend on
incoming offsets or positions tolerant in the presence of
out-of-bounds values by adjusting the values as needed.
Add an internal flag debug that can be set to enable the old
(not fault-tolerant) behavior.
Fixes#57490.
Change-Id: I8a7d422b9fd1d6f0980fd4e64da2f0489056d71e
Reviewed-on: https://go-review.googlesource.com/c/go/+/559436
Reviewed-by: Alan Donovan <adonovan@google.com>
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Reviewed-by: Robert Griesemer <gri@google.com>
The proposal discussion made clear that suffixes should be accepted,
so that people who use custom VERSION files can still pass runtime.Version()
to this code. But we forgot to do that in the CL. Do that.
Note that cmd/go also strips space- and tab-prefixed suffixes,
but go.dev/doc/toolchain only mentions dash, so this code only
strips dash.
Fixes#65061.
Change-Id: I6a427b78f964eb41c024890dae30223beaef13eb
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For #64169.
Change-Id: I0fc6d6a041ad48957f4aecd18b85c9098fc9b403
Reviewed-on: https://go-review.googlesource.com/c/go/+/559755
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This feature makes it possible to record unhandled panics
in any goroutine through a watchdog process (e.g. the same
application forked+exec'd as a child in a special mode)
that can process the panic report, for example by sending
it to a crash-reporting system such as Go telemetry
or Sentry.
Fixes#42888
Change-Id: I5aa7be8f726bbc70fc650540bd1a14ab60c62ecb
Reviewed-on: https://go-review.googlesource.com/c/go/+/547978
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Reviewed-by: Russ Cox <rsc@golang.org>
When we are crashing from an unrecovered panic, we freeze the
world, and print stack traces for all goroutines if GOTRACEBACK is
set to a high enough level. Freezing the world is best effort, so
there could still be goroutines that are not preempted, and so its
stack trace is unavailable and printed as "goroutine running on
other thread".
As we're crashing and not resuming execution on preempted
goroutines, we can make preemption more aggressive, preempting
cases that are not safe for resumption or stack scanning. This may
make goroutines more likely to be preempted in freezing the world
and have their stacks available.
Change-Id: Ie16269e2a05e007efa61368b695addc28d7a97ee
Reviewed-on: https://go-review.googlesource.com/c/go/+/546135
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Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
%03s zero-pads a string with spaces; always has and now always will.
Fixes#56486.
Change-Id: Ia336581ae7db1c3456699e69e14a3071f50c9f2a
Reviewed-on: https://go-review.googlesource.com/c/go/+/559197
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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This reverts CL 555776 (commit 704401ffa0).
Scores of tests break inside Google, and there was a test for the old behavior,
so clearly we thought it was correct at one point.
An example of code that broke inside Google is:
func (pn ProjectNumber) PaddedHexString() string {
return fmt.Sprintf("%016s", strconv.FormatInt(int64(pn), 16))
}
Here is another example:
// IPv4toISO create ISO address base on a given IPv4 address.
func IPv4toISO(v4 string) (string, error) {
if net.ParseIP(v4).To4() == nil {
return "", fmt.Errorf("invalid IPv4 address")
}
s := strings.Split(v4, ".")
var ss string
for _, n := range s {
ss = ss + fmt.Sprintf("%03s", n)
}
if len(ss) != 12 {
return "", fmt.Errorf("invalid IPv4 address")
}
return fmt.Sprint("49.0001." + ss[0:4] + "." + ss[4:8] + "." + ss[8:12] + ".00"), nil
}
This is doing the weird but apparently standard conversion from
IPv4 to ISO ISIS Area 1 (see for example [1]).
Here is an example from github.com/netbirdio/netbird:
func generateNewToken() (string, string, error) {
secret, err := b.Random(PATSecretLength)
if err != nil {
return "", "", err
}
checksum := crc32.ChecksumIEEE([]byte(secret))
encodedChecksum := base62.Encode(checksum)
paddedChecksum := fmt.Sprintf("%06s", encodedChecksum)
plainToken := PATPrefix + secret + paddedChecksum
hashedToken := sha256.Sum256([]byte(plainToken))
encodedHashedToken := b64.StdEncoding.EncodeToString(hashedToken[:])
return encodedHashedToken, plainToken, nil
}
base62.Encode returns a string no leading zeros; the %06s adds leading zeros.
Are there other ways to write these examples? Yes.
Has all this code worked until now? Also yes.
The change to this behavior observed that right padding doesn't
add zeros, only left padding, but that makes sense: in numbers
without decimal points, zeros on the left preserve the value
while zeros on the right change it.
Since we agree that this case is probably not important either way,
preserve the long-time behavior of %0s.
Will document it in a followup CL: this is a clean revert.
Reopen#56486.
[1] https://community.cisco.com/t5/routing/isis-net-address-configuration/m-p/1338984/highlight/true#M127827
Change-Id: Ie7dd35227f46933ccc9bfa1eac5fa8608f6d1918
Reviewed-on: https://go-review.googlesource.com/c/go/+/559196
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According to RFC 7230, empty field names in HTTP header are invalid.
However, there are no specific instructions for developers to deal
with that kind of case in the specification. CL 11242 chose to skip
it and do nothing about it, which now seems like a bad idea because
it has led `net/http` to behave inconsistently with the most widely-used
HTTP implementations: Apache, Nginx, Node with llhttp, H2O, Lighttpd, etc.
in the case of empty header keys.
There is a very small chance that this CL will break a few existing HTTP clients.
Fixes#65244
Change-Id: Ie01e9a6693d27caea4d81d1539345cf42b225535
Reviewed-on: https://go-review.googlesource.com/c/go/+/558095
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Reviewed-by: Damien Neil <dneil@google.com>
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Also: report language version (plus date) in spec header.
Fixes#65137.
Change-Id: I4f1d220d5922c40a36264df2d0a7bb7cd0756bac
Reviewed-on: https://go-review.googlesource.com/c/go/+/557596
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
This change vendors golang.org/x/telemetry and calls counter.Open in
cmd/go right at the beginning.
For #58894
Change-Id: Iae56328440614b213c1429972e6f68f22c2112cd
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TestValueEqual: Added test cases for DurationValue, StringValue, and TimeValue types.
TestValueAny: Added a test case for string values.
Change-Id: I74ef15bcfcacd0bf5d990debd24846283edf1ecd
GitHub-Last-Rev: 6adb9f6f31
GitHub-Pull-Request: golang/go#65303
Reviewed-on: https://go-review.googlesource.com/c/go/+/558755
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Found by codespell.
Change-Id: I2ebefbbbc8eacf9bc83051407519fa8fd5e4495f
GitHub-Last-Rev: 9cc550f3db
GitHub-Pull-Request: golang/go#65346
Reviewed-on: https://go-review.googlesource.com/c/go/+/559095
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Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
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- State that new markdown files belong in doc/next.
- Give hints on correct markdown syntax.
For #64169
Change-Id: Ied70e7ac443530c910eea2992ca6e303bbc10499
Reviewed-on: https://go-review.googlesource.com/c/go/+/558855
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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This CL changes the export data format to preserve alias uses.
Previously they were stripped away with types2.Unalias. For backwards
compatibility, we use pkgbits.TypeNamed, which is already used for the
predeclared aliases byte, rune, and any.
While here, remove unnecessary uses of types2.Unalias, and add a
missing one in recvBase to handle:
type T int
type A = T
func (*A) m() {}
Change-Id: I62ddb0426080a44436054964a90ab250bcd8df12
Reviewed-on: https://go-review.googlesource.com/c/go/+/558577
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We currently suppress runtime frames in tracebacks, except for
exported functions.
This CL also prints exported methods of exported types
in tracebacks, for consistency.
Change-Id: Ic65e7611621f0b210de5ae0c02b9d0a044f39fd6
Reviewed-on: https://go-review.googlesource.com/c/go/+/507736
Reviewed-by: Cherry Mui <cherryyz@google.com>
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Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
CL 464349 added a new linkname to provide gcount to runtime/pprof to
avoid a STW when estimating the goroutine profile allocation size.
However, adding a linkname here isn't necessary for a few reasons:
1. We already export gcount via NumGoroutines. I completely forgot about
this during review.
2. aktau suggested that goroutineProfileWithLabelsConcurrent return
gcount as a fast path estimate when the input is empty.
The second point keeps the code cleaner overall, so I've done that.
For #54014.
Change-Id: I6cb0811a769c805e269b55774cdd43509854078e
Reviewed-on: https://go-review.googlesource.com/c/go/+/559515
Auto-Submit: Michael Pratt <mpratt@google.com>
Auto-Submit: Nicolas Hillegeer <aktau@google.com>
Reviewed-by: Nicolas Hillegeer <aktau@google.com>
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uintptr
Adds the DW_AT_go_runtime_type attribute to the debug_info entry for
unsafe.Pointer (which is special) and fixes the debug_info entry of
uintptr so that its DW_AT_go_runtime_type attribute has the proper
class (it was accidentally using DW_CLS_ADDRESS instead of
DW_CLS_GO_TYPEREF)
Change-Id: I52e18593935fbda9bc425e849f4c7f50e9144ad4
Reviewed-on: https://go-review.googlesource.com/c/go/+/558275
Reviewed-by: Cherry Mui <cherryyz@google.com>
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Reviewed-by: Carlos Amedee <carlos@golang.org>
This change fixes an edge case in the zstd decompressor where
an int conversion could result in a negative window size.
Fixes#63979
For #62513
Change-Id: Ie714bf8fb51fa509b310deb8bd2c96bd87b52852
GitHub-Last-Rev: ab0be65782
GitHub-Pull-Request: golang/go#63980
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This reverts CL 557437.
Reason for revert: Appears to have broken wasip1 builders.
For #65178.
Change-Id: I59c1a310eb56589c768536fe444c1efaf862f8b0
Reviewed-on: https://go-review.googlesource.com/c/go/+/559237
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
When readying a goroutine, the scheduler typically places the readied
goroutine in pp.runnext, which will typically be the next goroutine to
run in the schedule.
In order to prevent a set of ping-pong goroutines from simply switching
back and forth via runnext and starving the rest of the run queue, a
goroutine scheduled via runnext shares a time slice (pp.schedtick) with
the previous goroutine.
sysmon detects "long-running goroutines", which really means Ps using
the same pp.schedtick for too long, and preempts them to allow the rest
of the run queue to run. Thus this avoids starvation via runnext.
However, wasm has no threads, and thus no sysmon. Without sysmon to
preempt, the possibility for starvation returns. Avoid this by disabling
runnext entirely on wasm. This means that readied goroutines always go
on the end of the run queue and thus cannot starve via runnext.
Note that this CL doesn't do anything about single long-running
goroutines. Without sysmon to preempt them, a single goroutine that
fails to yield will starve the run queue indefinitely.
For #65178.
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Change-Id: I7dffe1e72c6586474186b72f8068cff77b661eae
Reviewed-on: https://go-review.googlesource.com/c/go/+/557437
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Reviewed-by: Bryan Mills <bcmills@google.com>
Flakes in #64317 are a result of a race where the server shutdown
schedules ahead of the client read loop. Normal network latency usually
hides this, but wasm's net_fake.go has very low latency.
Explicitly allow the results of this race in the test.
For #64317.
Change-Id: I9c2572fb44643762fe3f3d7cb133d7e7a8a47881
Reviewed-on: https://go-review.googlesource.com/c/go/+/558595
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
This mimics the apparent behavior of writes on linux/amd64, in which a
write on an already-closed connection silently succeeds — even if the
connection has already been closed by the remote end — provided that
the packet fits in the kernel's send buffer.
I tested this by patching in CL 557437 and running the test on js/wasm
and wasip1/wasm locally.
Fixes#64317.
Change-Id: I43f6a89e5059115cb61e4ffc33a8371057cb67a1
Reviewed-on: https://go-review.googlesource.com/c/go/+/558915
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This is necessary for go generate to enter workspace mode for
recognizing package paths in the workspace.
Fixes#56098
Change-Id: I25f68de24f4189259353f63194823516e9d3d505
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest,gotip-windows-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/559195
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
go list -json=<fields> zeroes out the fields in the package struct
that aren't specified. The problem with this is that some of the fields
have references into other fields: specifically, the NoGoError's
Error() function accesses the package struct's Dir field, so if we
clear it out the error will just print out "no Go files in" without a
directory. Instead, make a copy of the package struct before we zero
out the fields so the original values are still there.
For #64946
Change-Id: I95103e91fa0782bb23a86a965d5eb87cb12654c6
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest,gotip-windows-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/553795
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
isTestFunc checked whether the parameter type is B, M or T before the version of Go1.17.
But, after Go1.18, isTestFunc checks F, too.
Change-Id: I30bc97c2b8f2974bc9ae4df2f32dc8dce760d7d6
GitHub-Last-Rev: 507d5b1f74
GitHub-Pull-Request: golang/go#56127
Reviewed-on: https://go-review.googlesource.com/c/go/+/441835
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
T[A] and T[B] are different types, but we were writing them both as
just "T". Reported by Russ.
Change-Id: I27db35946b6d3a1fad6c56c785fa6d850ad71d00
Reviewed-on: https://go-review.googlesource.com/c/go/+/558716
Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
When the invocation of the external linker, dsymutil or strip
command fails, print the command we invoked.
For #65292.
Change-Id: Icdb5f9ee942ebda4276f6373c3fbbf5222088d0b
Reviewed-on: https://go-review.googlesource.com/c/go/+/558856
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Forgot to remove this in CL 555596.
Change-Id: I903a6d1c02ee38b676e3e5860376d8d9509f0e03
Reviewed-on: https://go-review.googlesource.com/c/go/+/558675
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Roland Shoemaker <roland@golang.org>
