To infer type arguments in an assignment of the form
var target func(t1, t2, ...) = g
where g is a generic function
func g[P1, P2, ...](p1, p2, ...)
the type checker used the synthetic function call
g(t1, t2, ...)
But because each argument (of type) t1, t2, ... is assigned to its
corresponding parameter p1, p2, ..., type inference uses assignment
rules ("inexact match") for unification.
As a result, types such as mystring and string match even though
they should not (they are not identical), yet function parameter
types must be identical to match.
This CL fixes this by constructing the synthetic call
g'(func(t1, t2, ...))
where g' is the generic function
func g'[P1, P2, ...](func(p1, p2, ...))
This mimics the function assignment directly by representing it as
a single argument passing (of a function-typed argument). Function
parameter types must now be identical to unify.
As an added benefit, the implementation is simpler.
As a consequence, when such an assignment is invalid because the
function types cannot possibly match, we now correctly get an
inference error. Without this change, in some cases unification
would succeed, only to lead to an assignment error afterwards.
While at it, update the date in the copyright notice of
testdata/manual.go so we don't need to fix it each time we copy
code from a test case in manual.go into a issueXXXXX.go file.
Fixes#60688.
Change-Id: I716247f426ef33d76c7849b0c33c59124e55b859
Reviewed-on: https://go-review.googlesource.com/c/go/+/501938
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
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Add 3 tests that exist in go/types but that were not ported to types2.
Change-Id: I34d219f605f9ae66e8b4439c3dfe93cfa0ec9524
Reviewed-on: https://go-review.googlesource.com/c/go/+/501304
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
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Follow-up on CL 498955 which introduced a unification mode, to be used
to control the precision of unification of element types (CL 498895):
When unifying against core types of unbound type parameters, we must
use inexact unification at the top (irrespective of the unification mode),
otherwise it may fail when unifying against a defined type (core types
are always underlying types).
No specific test case (I have not been able to create one yet).
Change-Id: Ie15e98f4b9e9fb60d6857d34b03d350ebbf0375e
Reviewed-on: https://go-review.googlesource.com/c/go/+/501302
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This updates the logic from CL 489075 to avoid trying to save extra
sums if they aren't already expected to be present
and cfg.BuildMod != "mod" (as in the case of "go list -m -u all" with
a go.mod file that specifies go < 1.21).
Fixes#60667.
Updates #56222.
Change-Id: Ied6ed3e80a62f9cd9a328b43a415a42d14481056
Reviewed-on: https://go-review.googlesource.com/c/go/+/502015
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
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Fixes#60716
Change-Id: I86037784d6c12fd22bd03c3efabef379fa0646aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/502355
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
For #59488.
For #58645.
Change-Id: Ia9b76d49825dd74f7e52d829ec6d47e6c2addd76
Reviewed-on: https://go-review.googlesource.com/c/go/+/501825
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Add notes for cmp.Ordered and builtin.{min,max}.
Fixes#60648
Change-Id: I81806af2d9a0613befde3f2bbfbc2720f0726912
Reviewed-on: https://go-review.googlesource.com/c/go/+/502235
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Change-Id: Ib02b35887896eab418ba9dde764754538cb23b4f
Reviewed-on: https://go-review.googlesource.com/c/go/+/501277
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
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Auto-Submit: Ian Lance Taylor <iant@google.com>
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Change-Id: If13f4d4bc545f78e3eb8c23cf2e63f0eb273d71f
GitHub-Last-Rev: 32ca70f52a
GitHub-Pull-Request: golang/go#60703
Reviewed-on: https://go-review.googlesource.com/c/go/+/502055
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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In the ptrace system call, most of the newer architectures (e.g. arm64,riscv64,loong64)
do not provide support for the command PTRACE_{GET, SET}REGS.
The Linux kernel 2.6.33-rc7[1] introduces support for the command PTRACE_{GET,SET}REGSET,
which exports different types of register sets depending on the NT_* types, completely
overriding the functionality provided by PTRACE_{GET,SET}REGS.
[1] https://lore.kernel.org/all/20100211195614.886724710@sbs-t61.sc.intel.com/Fixes#60679.
Change-Id: I8c2671d64a7ecd654834740f4f1e1e50c00edcae
Reviewed-on: https://go-review.googlesource.com/c/go/+/501756
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When determining DepsErrors for packages, we were trying to sort
errors by the top package on their ImportStack (which would likely be
the package the error was generated for) to get a deterministic
error order.
The problem is that some PackageErrors don't have ImportStacks set on
them. Fall back to sorting the errors by the error text (instead of
making things more complicated by tracking the packages that produced
the errors more closely).
Fixes#59905
Change-Id: Id305e1e70801f8909fd6463383b8eda193559787
Reviewed-on: https://go-review.googlesource.com/c/go/+/501978
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In plugin mode, we mangle the type symbol name so it doesn't
contain characters that may confuse the external linker. With
generics, instantiated function name includes type names, so it
may also contain such characters and so also needs to be mangled.
Fixes#58800.
Change-Id: Ibb08c95b89b8a815ccef98193d3a025e9d4756cc
Reviewed-on: https://go-review.googlesource.com/c/go/+/500095
Reviewed-by: Than McIntosh <thanm@google.com>
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Some of the TestScript/gotoolchain* tests assume that go.env contains
GOTOOLCHAIN=auto, but that's not always the case, for example CI
environments may set it to `local` to avoid downloading a new toolchain.
This commit fixes the tests to work regardless of the value of
GOTOOLCHAIN in go.env.
Fixes#60685
Change-Id: Ieda22574f8a028893762274cf9db721c9d69bf7e
Reviewed-on: https://go-review.googlesource.com/c/go/+/502035
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Change-Id: I915eff34fcfe82f3514254f7d8998baa88a91da6
Reviewed-on: https://go-review.googlesource.com/c/go/+/501997
Reviewed-by: Ian Lance Taylor <iant@google.com>
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For #45964
For #59359
Change-Id: I7fd295a096e5776102e057789d157da681df9073
Reviewed-on: https://go-review.googlesource.com/c/go/+/501939
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This reverts CL 40364.
Reason for revert: Fallback path is still required on Solaris.
For #45964
For #59359
Change-Id: I4b8c8af77ee987cad6617221793b90c9a8829c3e
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It's not needed per CL 499515.
Change-Id: I2a5ce46be93dad1442c0aad736fd8d230ee35f39
Reviewed-on: https://go-review.googlesource.com/c/go/+/501996
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/gc/heap/live:bytes may exceed MemStats.HeapAlloc, even when all data is
flushed, becuase the GC may double-count objects when marking them. This
is an intentional design choice that is largely inconsequential. The
runtime is already robust to it, and the condition is rare.
Fixes#60607.
Change-Id: I4da402efc24327328d2d8780e4e49961b189f0ea
Reviewed-on: https://go-review.googlesource.com/c/go/+/501858
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For #60105
For #44886
Change-Id: I8f6cfc4490535979ee8c0d8381c03b03c9c7b9a0
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The returned descriptor now remains in non-blocking mode.
For #58408
For #60211
Change-Id: I88d33c180db642d055b4fed3b03a9afa02e746bd
Reviewed-on: https://go-review.googlesource.com/c/go/+/501699
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For #59584
Change-Id: Iaa3f8b23010ad452c134ac608c63d2a41cc4e409
Reviewed-on: https://go-review.googlesource.com/c/go/+/501698
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Roland Shoemaker <roland@golang.org>
For #59488
Change-Id: I73ee4d1d8b9d8e6f0aad9e3bb98729aaa0f06a47
Reviewed-on: https://go-review.googlesource.com/c/go/+/501697
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Fill in some of the simpler entries, leave some more TODO entries.
For #58645
Change-Id: I20eb09ba709520ab27301c568d777184a405ffdc
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Change-Id: I8ae86200675dcad0f1d4c9924459d8196da9740f
Reviewed-on: https://go-review.googlesource.com/c/go/+/501755
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Per the spec, methods cannot be associated with a named pointer type.
Exit early with an empty method set in this case.
This matches the corresponding check in LookupFieldOrMethod;
the check is not present in (lowercase) lookupFieldOrMethod
because it (the check) doesn't apply to struct fields.
Fixes#60634.
Change-Id: Ica6ca8be6b850ea0da6f0b441fbf5b99cb0b6b17
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Line directives do not provide a way to escape newline characters, so
source file paths containing newlines must not be written in them.
Updates #60167.
Change-Id: I30f8b381cc7d1df6914c27591544edf424a4b634
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Failing to close the response body before returning leaks
the in-progress request past the test lifetime.
Fixes#60264
Change-Id: Ic327d9f8e02e87ed656324aaa042f833d9ea18ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/501309
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The section on type inference has not been updated yet for Go 1.21.
Add a temporary note so that readers referred to this section from
the release notes are not confused.
Change-Id: Idc4c74d6d700f891c625289e873ad5aa9c2c5213
Reviewed-on: https://go-review.googlesource.com/c/go/+/501308
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For #45964
For #59359
Change-Id: I9f8f4c17ccd9711f81d152953a5e6aea50c6a28f
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This reverts CL 422375.
Reason for revert: We still need the fallback path on Solaris.
For #45964
For #59359
Change-Id: Ie598b9ef180708fb157080015aee44f67f6737c4
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cmd/cover uses '//line' directives to map instrumented source files
back to the original source file and line numbers.
Line directives have no way to escape newline characters, so cmd/cover
must not be used with source file paths that contain such characters.
Updates #60167.
Change-Id: I6dc039392d59fc3a5a6121ef6ca97b0ab0da5288
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cmd/cgo uses '//line' directives to map generated source
files back to the original source file and line nmubers.
The line directives have no way to escape newline characters,
so cmd/cgo must not be used if the line directives would contain
such characters.
Updates #60167.
Change-Id: I8581cea74d6c08f82e86ed87127e81252e1bf78c
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Toolchain2 is only used for building toolchain3. We don't need to
build it with PGO. And building with PGO causes packages to be
built twice (one with PGO for the compiler, one without for other
programs). Disable PGO for toolchain2.
Also, I thought cmd/dist requires toolchain2 and toolchain3
compilers are identical binaries, so they need to be built in the
same way. But it doesn't.
Change-Id: Iaf49816da3dd06db79b48482c0e2435e09b512d7
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This test is fundamentally about testing cgo.
Skip on nocgo builders.
Fixes CGO_ENABLED=0 go test -run=Script/newline
Change-Id: Ic02349e0acd8cf67508c1bd788333f42b30e84fc
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The gccgo on the builder is not updated to support runtime/cgo
Updates #60306
Change-Id: If0fb1ccdf589cc9741f6a065bacfa4f06e64ec15
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This only affects tests, typically manual tests, but when using trace
we're debugging and we don't want to crash because of trace itself.
No test because a test would cause trace output. Manually verified.
Fixes#60649.
Change-Id: I97abdb94db05774801ec5da56171f4a1aff35615
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For #15527
For #57786
Change-Id: I75ed0b4bac8e31fac2afef17dad708dc9a3d74e1
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This clarifies the ambiguity of the TODO word as raised in
golang/go#56625.
Also links the introduction text to each function.
Note: linking from Context methods documentation is blocked for now by
golang/go#59728.
Change-Id: Ie6080bd8dee3a652436b0875ddc5f452287c9493
Reviewed-on: https://go-review.googlesource.com/c/go/+/501115
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GODEBUG=dontfreezetheworld=1 allows goroutines to continue execution
during fatal panic. This increases the chance that tracebackothers will
encounter running goroutines that it must skip, which is expected and
fine. However, it also introduces the risk that a goroutine transitions
from stopped to running in the middle of traceback, which is unsafe and
may cause traceback crashes.
Mitigate this by halting M execution if it naturally enters the
scheduler. This ensures that goroutines cannot transition from stopped
to running after freezetheworld. We simply deadlock rather than using
gcstopm to continue keeping disturbance to scheduler state to a minimum.
Change-Id: I9aa8d84abf038ae17142f34f4384e920b1490e81
Reviewed-on: https://go-review.googlesource.com/c/go/+/501255
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Fixes#60570.
Change-Id: I7ef834731ea26ceee5ec9b7438fdd8323aaf828e
Reviewed-on: https://go-review.googlesource.com/c/go/+/500416
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Directory or file paths containing newlines may cause tools (such as
cmd/cgo) that emit "//line" or "#line" -directives to write part of
the path into non-comment lines in generated source code. If those
lines contain valid Go code, it may be injected into the resulting
binary.
(Note that Go import paths and file paths within module zip files
already could not contain newlines.)
Thanks to Juho Nurminen of Mattermost for reporting this issue.
Fixes#60167.
Fixes CVE-2023-29402.
Change-Id: I64572e9f454bce7b685d00e2e6a1c96cd33d53df
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1882606
Reviewed-by: Roland Shoemaker <bracewell@google.com>
Run-TryBot: Roland Shoemaker <bracewell@google.com>
Reviewed-by: Russ Cox <rsc@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/501226
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Enforce that linker flags which expect arguments get them, otherwise it
may be possible to smuggle unexpected flags through as the linker can
consume what looks like a flag as an argument to a preceding flag (i.e.
"-Wl,-O -Wl,-R,-bad-flag" is interpreted as "-O=-R -bad-flag"). Also be
somewhat more restrictive in the general format of some flags.
Thanks to Juho Nurminen of Mattermost for reporting this issue.
Fixes#60305
Fixes CVE-2023-29404
Change-Id: I913df78a692cee390deefc3cd7d8f5b031524fc9
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1876275
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/501225
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
The flags that we recorded in _cgo_flags did not use any quoting,
so a flag containing embedded spaces was mishandled.
Change the _cgo_flags format to put each flag on a separate line.
That is a simple format that does not require any quoting.
As far as I can tell only cmd/go uses _cgo_flags, and it is only
used for gccgo. If this patch doesn't cause any trouble, then
in the next release we can change to only using _cgo_flags for gccgo.
Thanks to Juho Nurminen of Mattermost for reporting this issue.
Fixes#60306
Fixes CVE-2023-29405
Change-Id: I81fb5337db8a22e1f4daca22ceff4b79b96d0b4f
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1875094
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Roland Shoemaker <bracewell@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/501224
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
This was missing from CL 466397.
For #15513.
Change-Id: I138b7d76842815f4e702d7fe551aa8968097f75b
Reviewed-on: https://go-review.googlesource.com/c/go/+/500955
Reviewed-by: Michael Matloob <matloob@golang.org>
TryBot-Bypass: Russ Cox <rsc@golang.org>
