Give an example illustrating the problem with dots inside groups
or keys. Clarify that to fix it in general, you need to do more
than escape the keys, since that won't distinguish the group "a.b"
from the two groups "a" and "b".
Updates #56345.
Change-Id: Ide301899c548d50b0a1f18e93e93d6e11ad485cf
Reviewed-on: https://go-review.googlesource.com/c/go/+/478199
Reviewed-by: Alan Donovan <adonovan@google.com>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
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Check if any header found in case of EOF to recognize header-only
messages and if so, return a Message with the found headers
and a body from the reader which is already empty.
Fixes#33823.
Change-Id: I2f0396b08e9be4e6c89c212ce62b9c87b5f63123
GitHub-Last-Rev: 356a942083
GitHub-Pull-Request: golang/go#47898
Reviewed-on: https://go-review.googlesource.com/c/go/+/344269
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
I edited dec_helpers.go without realizing that it is a generated file.
Fix the generator to generate the current version (which generates
a small comment change).
Change-Id: I70e3bc78eb0728d23c08972611218f288dc1d29c
Reviewed-on: https://go-review.googlesource.com/c/go/+/479117
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
By changing the signature to accept a slice rather than an
array, we can avoid creating the array in the first place.
Functionally, we now also record comma-ok types if the
corresponding assignment was incorrect. But this change
provides more (not less) information through the API and
only so if the program is incorrect in the first place.
Change-Id: I0d629441f2f890a37912171fb26ef0e75827ce23
Reviewed-on: https://go-review.googlesource.com/c/go/+/478218
Auto-Submit: Robert Griesemer <gri@google.com>
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Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
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In order to identify the sigreturn function, gdb looks for
"__restore_rt". However because that symbol is sometimes missing from
the symbol table, it also performs the same instruction matching as
libgcc, but only in symbols containing "sigaction" (it expects sigaction
to preceed __restore_rt).
To match this heuristic, we add __sigaction to the sigreturn symbol
name.
Fixes#25218.
Change-Id: I09cb231ad23f668d451f31dd5633f782355fc91d
Reviewed-on: https://go-review.googlesource.com/c/go/+/479096
Auto-Submit: Michael Pratt <mpratt@google.com>
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This GODEBUG flag disables the freezetheworld call during fatal panic.
freezetheworld asks the scheduler to stop running goroutines on all Ms.
This is normally useful, as it ensures we can collect a traceback from
every goroutine. However, it can be frustrating when debugging the
scheduler itself, as it significantly changes the scheduler state from
when the panic started.
Setting this flag has some disadvantages. Most notably, running
goroutines will not traceback in the standard output (though they may be
included in the final SIGQUIT loop). Additionally, we may missing
concurrently created goroutines when looping over allgs (CL 270861 made
this safe, but still racy). The final state of all goroutines will also
be further removed from the time of panic, as they continued to run for
a while.
One unfortunate part of this flag is the final SIGQUIT loop in the
runtime leaves every thread in the signal handler at exit. This is a bit
frustrating in gdb, which doesn't understand how to step beyond
sigtramp. The data is still there, but you must manually walk.
Change-Id: Ie6bd3ac521fcababea668196b60cf225a0be1a00
Reviewed-on: https://go-review.googlesource.com/c/go/+/478975
Reviewed-by: Austin Clements <austin@google.com>
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Auto-Submit: Michael Pratt <mpratt@google.com>
A comparison instruction was missing in CL 392854.
Should fix ARM builders.
For #51676.
Change-Id: Ica27a99be10e595bab4fad35e2e6c00a1c68a662
Reviewed-on: https://go-review.googlesource.com/c/go/+/479255
TryBot-Bypass: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
This fixes a segv that was reported due to building minio. The
problem occurred because of an incorrect selection of the
base register, which was introduced by CL 306369.
Fixes#59196
Change-Id: Ieb77b2afa8fb4e6f3943df5ce138679f6750d376
Reviewed-on: https://go-review.googlesource.com/c/go/+/478920
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
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Reviewed-by: Archana Ravindar <aravind5@in.ibm.com>
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Auto-Submit: Lynn Boger <laboger@linux.vnet.ibm.com>
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This currently defines an internal function supportsMultipathTCP which
reports whether MPTCP[1] is supported on the current platform.
Only Linux is supported here.
The check on Linux is performed once by attemting to create an MPTCP
socket and look at the returned error:
- If the protocol is not supported, EINVAL (kernel < 5.6) or
EPROTONOSUPPORT (kernel >= 5.6) is returned and there is no point to
try again.
- Other errors can be returned:
- ENOPROTOOPT: the sysctl knob net.mptcp.enabled is set to 0
- Unpredictable ones: if MPTCP is blocked using SELinux, eBPF, etc.
These other errors are due to modifications that can be reverted during
the session: MPTCP can be available again later. In this case, it is
fine to always try to create an MPTCP socket and fallback to TCP in case
of error.
This work has been co-developped by Gregory Detal
<gregory.detal@tessares.net>.
[1] https://www.rfc-editor.org/rfc/rfc8684.html
Updates #56539
Change-Id: Ic84fe85aad887a2be4556a898e649bf6b6f12f03
Reviewed-on: https://go-review.googlesource.com/c/go/+/471135
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Auto-Submit: Ian Lance Taylor <iant@google.com>
JSON is derived from Javascript, so we should use Javascript-inspired
literals instead of ones more common to Go.
In Javascript, infinity is declared as Infinity rather than Inf.
Change-Id: I6c81353d0c677640f3f11961a37d792408ac03fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/478758
Run-TryBot: Joseph Tsai <joetsai@digital-static.net>
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Reviewed-by: Heschi Kreinick <heschi@google.com>
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In a C thread, it's necessary to acquire an extra M by using needm while invoking a Go function from C. But, needm and dropm are heavy costs due to the signal-related syscalls.
So, we change to not dropm while returning back to C, which means binding the extra M to the C thread until it exits, to avoid needm and dropm on each C to Go call.
Instead, we only dropm while the C thread exits, so the extra M won't leak.
When invoking a Go function from C:
Allocate a pthread variable using pthread_key_create, only once per shared object, and register a thread-exit-time destructor.
And store the g0 of the current m into the thread-specified value of the pthread key, only once per C thread, so that the destructor will put the extra M back onto the extra M list while the C thread exits.
When returning back to C:
Skip dropm in cgocallback, when the pthread variable has been created, so that the extra M will be reused the next time invoke a Go function from C.
This is purely a performance optimization. The old version, in which needm & dropm happen on each cgo call, is still correct too, and we have to keep the old version on systems with cgo but without pthreads, like Windows.
This optimization is significant, and the specific value depends on the OS system and CPU, but in general, it can be considered as 10x faster, for a simple Go function call from a C thread.
For the newly added BenchmarkCGoInCThread, some benchmark results:
1. it's 28x faster, from 3395 ns/op to 121 ns/op, in darwin OS & Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
2. it's 6.5x faster, from 1495 ns/op to 230 ns/op, in Linux OS & Intel(R) Xeon(R) CPU E5-2630 0 @ 2.30GHz
Fixes#51676
Change-Id: I380702fe2f9b6b401b2d6f04b0aba990f4b9ee6c
GitHub-Last-Rev: 93dc64ad98
GitHub-Pull-Request: golang/go#51679
Reviewed-on: https://go-review.googlesource.com/c/go/+/392854
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The runtime.etext symbol is a marker symbol that marks the end of
(Go's) text section. Currently it has 0 size on some platforms.
Especially in external linking mode, this may cause the next
symbol (e.g. a C function) to have the same address as
runtime.etext, which may confuse some symbolizer. Add some padding
bytes to avoid address collision.
Change-Id: Ic450bab72e4ac79a3b6b891729831d4148b89234
Reviewed-on: https://go-review.googlesource.com/c/go/+/479075
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This new type will be used in the following commits.
The goal is to have a tristate, an enum with three values:
- system default (0)
- enabled
- disabled
The system default value is linked to defaultMPTCPEnabled: disabled by
default for the moment. Users will be able to force enabling/disabling
MPTCP or use the default behaviour.
This work has been co-developped by Gregory Detal
<gregory.detal@tessares.net>.
Updates #56539
Change-Id: I8fa0cad7a18ca967508799fc828ef060b27683d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/477735
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Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
This check is already done by PeekASN1Tag.
Change-Id: Ieba0e35548f7f99bce689d29adaea6b8e471cc70
GitHub-Last-Rev: b4ef3dcc23
GitHub-Pull-Request: golang/go#59197
Reviewed-on: https://go-review.googlesource.com/c/go/+/478835
Reviewed-by: Roland Shoemaker <roland@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
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Change-Id: I84533d2df1a20f6337c43b1ca00d8022909a0018
GitHub-Last-Rev: 7dcc4e7296
GitHub-Pull-Request: golang/go#59195
Reviewed-on: https://go-review.googlesource.com/c/go/+/478816
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
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Under the right conditions we can optimize cmp comparisons to cmn
comparisons, such as:
func foo(a, b int) int {
var c int
if a + b < 0 {
c = 1
}
return c
}
Previously it's compiled as:
ADD R1, R0, R1
CMP $0, R1
CSET LT, R0
With this CL it's compiled as:
CMN R1, R0
CSET MI, R0
Here we need to pay attention to the overflow situation of a+b, the MI
flag means N==1, which doesn't honor the overflow flag V, its value
depends only on the sign of the result. So it has the same semantic of
the Go code, so it's correct.
Similarly, this CL also optimizes the case of >= comparison
using the PL conditional flag.
Change-Id: I47179faba5b30cca84ea69bafa2ad5241bf6dfba
Reviewed-on: https://go-review.googlesource.com/c/go/+/476116
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This CL combines some rules with the same structure.
In order to avoid extremely long rules, this CL does not merge some
rules. In addition, this CL aligned the components of some rules for
better reading.
Change-Id: I4ba1493251ace00b10591e3c8eef4b6277a4b226
Reviewed-on: https://go-review.googlesource.com/c/go/+/476115
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Currently, net/http replaces the Referer header with the URL of the
previous request, regardless of its status. This CL changes this
behavior, respecting the Referer header for secure connections, if it is
set.
Fixes#44160
Change-Id: I2d7fe37dd681549136329e832188294691584870
Reviewed-on: https://go-review.googlesource.com/c/go/+/291636
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Nick Craig-Wood <nickcw@gmail.com>
Run-TryBot: Damien Neil <dneil@google.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Most of these are one-off mistakes. Only one file was all spaces.
Change-Id: I277c3ce4a4811aa4248c90676f66bc775ae8d062
Reviewed-on: https://go-review.googlesource.com/c/go/+/478976
Run-TryBot: Michael Pratt <mpratt@google.com>
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The -test.v=test2json flag causes the testing package to inject extra
control characters in the output to allow the JSON parser to more
gracefully handle extraneous writes to os.Stdout and/or os.Stderr in
the package under test (see CL 443596). However, it doesn't filter out
those control characters because almost no real-world tests will
output them.
It turns out that testing.TestFlag is one of the rare tests that does
output those control characters, because it tests the
-test.v=test2json flag itself.
Fixes#59181.
Change-Id: I35ca6748afcd3d4333563028817caac946f5e86a
Reviewed-on: https://go-review.googlesource.com/c/go/+/479035
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Auto-Submit: Bryan Mills <bcmills@google.com>
Fixes#59172
Change-Id: I54d5e724f10117a40ec5dd58c810f6bbb2475933
GitHub-Last-Rev: d1a986698c
GitHub-Pull-Request: golang/go#59173
Reviewed-on: https://go-review.googlesource.com/c/go/+/478215
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
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Fetch usernames and groups via systemd userdb if available.
Otherwise fall back to parsing /etc/passwd, etc.
Fixes#38810
Co-authored-by: Michael Stapelberg <stapelberg@google.com>
Change-Id: Iff6ffc54feec6b6cec241b89e362c2285c8c0454
GitHub-Last-Rev: 1a627cc9a1
GitHub-Pull-Request: golang/go#57458
Reviewed-on: https://go-review.googlesource.com/c/go/+/459455
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The vendor_import test lists packages that are known bad (e.g.
bad.go, invalid.go). Pass -e to permit error.
The mod_vendor_auto test includes a package that imports a main
package, which should be an error. Pass -e to permit error.
Updates #59186.
Change-Id: I3b63025c3935f55feda1a95151d4c688d0394644
Reviewed-on: https://go-review.googlesource.com/c/go/+/477838
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Currently it uses "go list ...", which includes all packages in
the known universe, and may include unresolved dependencies. The
test for issue #8181 is specifically for that the test dependency
of package b is downloaded. Test that specifically.
Change-Id: Icfbd7e197698b10ae4bc7c8aa3b0f2c477ca6b8e
Reviewed-on: https://go-review.googlesource.com/c/go/+/477837
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- Log the actual addresses reported, in case that information is relevant.
- Keep going after the first error, so that we report more information
about the idle connections after they have been used. (Was the first
connection dropped completely, or did it later show up as idle?)
- Remove the third request at the end of the test. It had been
assuming that the address for a new connection would always be
different from the address for the just-closed connection; however,
that assumption does not hold in general.
Removing the third request addresses one of the two failure modes seen
in #55195. It may help in investigating the other failure mode, but I
do not expect it to fix the failures entirely. (I suspect that the
other failure mode is a synchronization bug in returning the idle
connection from the first request.)
For #55195.
Change-Id: If9604ea68db0697268288ce9812dd57633e83fbd
Reviewed-on: https://go-review.googlesource.com/c/go/+/478515
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
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This is intended to fix the failure mode observed in
https://build.golang.org/log/f153e06ed547517fb2cddb0fa817fea40a6146f7,
but I haven't been able to reproduce that failure mode locally so I'm
not sure whether it actually does.
Change-Id: Ib14378f1299a76b54013419bdc715a9dbdd94667
Reviewed-on: https://go-review.googlesource.com/c/go/+/478235
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In #59155, we observed that the IdleConnStrsForTesting_h2 helper
function sometimes reported extra connections after a
"client conn not usable" failure and retry. It turns out that that
state corresponds exactly to the
http2clientConnIdleState.canTakeNewRequest field, so (with a bit of
extra nethttpomithttp2 plumbing) we can use that field in the helper
to filter out the unusable connections.
Fixes#59155.
Change-Id: Ief6283c9c8c5ec47dd9f378beb0ddf720832484e
Reviewed-on: https://go-review.googlesource.com/c/go/+/477856
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Also add code to replace the vendor directory in the prefix-map in
vendored modules. We weren't doing that before because in vendored
modules, the module's Dir field was set to empty, so nothing was being
replaced. Instead when Dir is not set, so we are in vendor mode,
replace the entire vendor directory's path.
Change-Id: I910499c74237699fd36d18049909a72e2b6705d9
Reviewed-on: https://go-review.googlesource.com/c/go/+/478455
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Reviewed-by: Michael Matloob <matloob@golang.org>
During the context switch of goroutine scheduling, the value of the
fcc0 register needs to be saved on the stack.
Fixs #59000.
Change-Id: Ie80dbae738f60df6c11a3fe31fc57de817d76afc
Reviewed-on: https://go-review.googlesource.com/c/go/+/475577
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Reviewed-by: abner chenc <chenguoqi@loongson.cn>
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Reviewed-by: WANG Xuerui <git@xen0n.name>
For #59169
Change-Id: Id72ad9fe8b6e1d7cf64f972520ae8858f70c025a
Reviewed-on: https://go-review.googlesource.com/c/go/+/478217
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Auto-Submit: Ian Lance Taylor <iant@golang.org>
These are ISA 3.0 power9 instructions which are helpful when reducing
a vector compare result into a GPR.
They are used in a future patch to improve the bytes.IndexByte asm
routine.
Change-Id: I424e2628e577167b9b7c0fcbd82099daf568ea35
Reviewed-on: https://go-review.googlesource.com/c/go/+/478115
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
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While at it, also use concrete type for non-interface type test.
Change-Id: Ie468c30ee31ba99ef8f9a810d3be851fd37b9b43
Reviewed-on: https://go-review.googlesource.com/c/go/+/478356
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Reviewed-by: Keith Randall <khr@google.com>
Delete the set of bytes that need quoting in TextHandler, because it
is almost identical to the set for JSON. Use JSONHandler's safeSet
with a few exceptions.
Updates #56345.
Change-Id: Iff6d309c067affef2e5ecfcebd6e1bb8f00f95b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/478198
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
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Bench log file is created non-portably, only works on system where
"/tmp" existed and "/" is path separator.
Fixing this by using portable methods from std lib.
Updates #56345
Change-Id: I1f6b6b97b913ca56a6053beca7025652618ecbf3
Reviewed-on: https://go-review.googlesource.com/c/go/+/478355
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Truncate() a non existent file on Windows currently creates a new blank
file. This behavior is not consistent with other OSes where a file not
found error would instead be returned. This change makes Truncate on
Windows return a file-not-found error when the specified file doesn't
exist, bringing the behavior consistent.
New test cases have been added to prevent a regression.
Fixes#58977
Change-Id: Iaf7b41fc4ea86a2b2ccc59f8be81be42ed211b5c
GitHub-Last-Rev: 636b6c37c1
GitHub-Pull-Request: golang/go#59085
Reviewed-on: https://go-review.googlesource.com/c/go/+/477215
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Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
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For G[T] that was seen and compiled in imported package, it is not added
to typecheck.Target.Decls, prevent wasting compile time re-creating
DUPOKS symbols. However, the linker do not support a type symbol
referencing a method symbol across DSO boundary. That causes unreachable
sym error when building under -linkshared mode.
To fix it, always re-compile generic methods in linkshared mode.
Fixes#58966
Change-Id: I894b417cfe8234ae1fe809cc975889345df22cef
Reviewed-on: https://go-review.googlesource.com/c/go/+/477375
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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- Remove the norace_test.go files, moving their contents elsewhere.
- Rename the internal/testutil package to internal/slogtest.
- Remove value_unsafe.go, moving its contents to value.go.
Updates golang/go#56345.
Change-Id: I2a24ace5aea47f7a3067cd671f606c4fb279d744
Reviewed-on: https://go-review.googlesource.com/c/go/+/478197
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Reviewed-by: Ian Lance Taylor <iant@google.com>
For ++/-- statements, we know that syntax.AssignStmt.Lhs is a
single expression. Avoid unpacking (and allocating a slice) in
that case. Minor optimization.
Change-Id: I6615fd12277b1cd7d4f8b86e0b9d39f27708c13e
Reviewed-on: https://go-review.googlesource.com/c/go/+/477915
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We can just use Checker.use, as long as we take care of blank (_)
identifiers that may appear of the LHS of assignments. It's ok to
"use" non-blank variables in case of an error, even on the LHS.
This makes this code match the types2 implementation.
Change-Id: Ied9b9802ecb63912631bbde1dc6993ae855a691b
Reviewed-on: https://go-review.googlesource.com/c/go/+/477895
Reviewed-by: Robert Griesemer <gri@google.com>
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Step towards disentangling assignment checking functionality.
In preparation for reverse inference of function type arguments,
but independently helpful in better separating concerns in the code.
Change-Id: I9bac9d8005090c00d9ae6c5cfa13765aacce6b12
Reviewed-on: https://go-review.googlesource.com/c/go/+/477855
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The changes to exprList (in call.go), made in CL 282193, didn't
get faithfully ported to types2: in the case of operand mode
commaerr, unpacking didn't correctly set the type of the 2nd
value to error. This shouldn't matter for the compiler, but
the code differs from the go/types version. Make them the same.
Change-Id: I6f69575f9ad4f43169b851dffeed85c19588a261
Reviewed-on: https://go-review.googlesource.com/c/go/+/478255
Run-TryBot: Robert Griesemer <gri@google.com>
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