Currently in the linker, for trampoline insertion it does a one-pass
approach, where it assigns addresses for each function and inserts
trampolines on the go. For this to work and not to emit too many
unnecessary trampolines, the functions need to be laid out in
dependency order, so a direct call's target is always as a known
address (or known to be not too far).
This mostly works, but there are a few exceptions:
- linkname can break dependency tree and cause cycles.
- in internal linking mode, on some platforms, some calls are turned
into calls via PLT, but the PLT stubs are inserted rather late.
Also, this is expensive in that it has to investigate all CALL
relocations.
This CL changes it to use a two-pass approach. The first pass is
just to assign addresses without inserting any trampolines, assuming
the program is not too big. If this succeeds, no extra work needs to
be done. If this fails, start over and insert trampolines for too-
far targets as well as targets with unknown addresses. This should
make it faster for small programs (most cases) and generate fewer
conservative trampolines.
Change-Id: Ib13e01f38ec6dfbef1cd446b06da33ee17bded5d
Reviewed-on: https://go-review.googlesource.com/c/go/+/314450
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
PLT and GOT are used more than on PE. Update the comment.
Change-Id: Iaddb326680a7709a1442675a38c021331be32472
Reviewed-on: https://go-review.googlesource.com/c/go/+/314929
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
This CL is a mix of CL 312149 and CL 314409, adding the
Checker.singleIndex method to provide better error messages when an
unexpected ListExpr is encountered.
Change-Id: I45d6de9b4dfc299dc2d356ca14d05c9191de818d
Reviewed-on: https://go-review.googlesource.com/c/go/+/314869
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
Over this cycle some error code values have changed due to codes being
added/removed. This is probably OK to do once more before we export
error codes in a later Go version, but for now let's keep them stable.
Move things around to correct the changes, and update comments in
errorcodes.go to make it clearer that new codes should be added at the
end.
Change-Id: Id32827ef1a72cfd876ccc039da11d0a1be7470e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/314830
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
Having multiple subdirectories of go/types containing test data is
slightly problematic:
- If ever we were to include a .go file in one of these directories,
we'd inadvertently create a visible package.
- It's difficult to add other content in testdata/, since TestTestdata
scans the entire directory.
Move everything down a level, into testdata/{fixedbugs,examples,check},
and update tests accordingly.
Change-Id: Idd074c94b7b261d678934330539e41a48c2a9dc9
Reviewed-on: https://go-review.googlesource.com/c/go/+/314829
Trust: Robert Findley <rfindley@google.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
Fixes#45594.
Change-Id: I2fcc784e6908403dd96b009546e1ac2f53b9f0e8
Reviewed-on: https://go-review.googlesource.com/c/go/+/314776
Trust: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Robert Griesemer <gri@golang.org>
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Reviewed-by: Dan Scales <danscales@google.com>
There was only one meaningful caller, which changes to call time_now.
This clearly separates systems that use walltime1 to be just those
that use the stub version of time_now. That is to say, those that do
not provide an assembler version of time_now.
Change-Id: I14c06cc402070bd705f953af6f9966785015e2a5
Reviewed-on: https://go-review.googlesource.com/c/go/+/314769
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
This is a 1:1 port of CL 313650 to go/types.
Change-Id: Iec01ac2831f21162d9977a139549e081ee769f90
Reviewed-on: https://go-review.googlesource.com/c/go/+/314631
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
This is a port of CL 312170 to go/types, adjusted to use go/ast and to
add error codes. go/parser already emits errors for non-identifiers on
the LHS of a short var decl, so a TODO is added to reconsider this
redundancy.
A new error code is added for repeated identifiers in short var decls.
This is a bit specific, but I considered it to be a unique kind of
error.
The x/tools tests for this port turned up a bug: the new logic failed to
call recordDef for blank identifiers. Patchset #2 contains the fix for
this bug, both in go/types and cmd/compile/internal/types2.
Change-Id: Ibdc40b8b4ad0e0696111d431682e1f1056fd5eeb
Reviewed-on: https://go-review.googlesource.com/c/go/+/314629
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
This is a 1:1 port of CL 311651 to go/types.
Change-Id: I9d91b45cc5fa7ce686d6a91d4dde274d9f80e0d7
Reviewed-on: https://go-review.googlesource.com/c/go/+/314595
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
Build other definitions with the !faketime build tag.
This makes it easy for us to add new assembly implementations of time.now.
Change-Id: I4e48e41a4a04ab001030e6d1cdd9cebfa0161b0d
Reviewed-on: https://go-review.googlesource.com/c/go/+/314274
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
This is a step toward separating whether time.now is implemented in
assembly from whether we are using faketime.
Change-Id: I8bf059b44a103b034835e3d3b799319cc05e9552
Reviewed-on: https://go-review.googlesource.com/c/go/+/314273
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
This is a 1:1 port of CL 309830 to go/types.
Change-Id: Ibf709f8194dd5e93a87145e5f9db674ce93af529
Reviewed-on: https://go-review.googlesource.com/c/go/+/314594
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
This is a port of CL 308973. The only change is to remove a TODO at
inference.go2:100 to improve the error position. The go/types error
position is fine.
Change-Id: Ibf61f3458adde91dec9c7531cbd892ca654a5497
Reviewed-on: https://go-review.googlesource.com/c/go/+/314593
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
This is a port of CL 308372 to go/types. The only meaningful change was
to add TODOs to improve the positioning error messages.
Change-Id: I8314615d0851a59c2b5fd30eb897d581652eacc3
Reviewed-on: https://go-review.googlesource.com/c/go/+/314435
Trust: Robert Findley <rfindley@google.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
1. The existing prose implied that a switch expression type must
be comparable because it is tested for equality against all case
expressions. But for an empty switch (no case expressions), it
was not clear if the switch expression needed to be comparable.
Require it to match the behavior of compiler and type checkers.
2. While making this change, remove redundant language explaining
what happens with untyped boolean switch expression values: the
default type of an untyped boolean value is bool, this is already
covered by the first part of the relevant sentence.
Fixes#43200.
Change-Id: Id8e0f29cfa8722b57cd2b7b58cba85b58c5f842b
Reviewed-on: https://go-review.googlesource.com/c/go/+/314411
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Rob Pike <r@golang.org>
This is a port of the go/types CL https://golang.org/cl/313035
with minor adjustments (use of package syntax rather than go/ast).
Change-Id: I89410efb3d27be85fdbe827f966c2c91ee5693b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/314410
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
This is a modified port of the https://golang.org/cl/313909
change for go/types.
- add catch-all cases for unexpected expression lists
- add Checker.singleIndex function to check single indices
- better syntax error handling in parser for invalid type
instantiations that are missing a type argument
Change-Id: I6f0f396d637ad66b79f803d886fdc20ee55a98b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/314409
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
In c9211577eb @bcmills removed the returned error from
`Lookup`. However, the function docstring still mentions that this can return an error.
So this corrects the docs.
Change-Id: Idca74a200dfdb024e3d7ff6c439c70632cfec11a
GitHub-Last-Rev: 62eaacf70c
GitHub-Pull-Request: golang/go#45822
Reviewed-on: https://go-review.googlesource.com/c/go/+/314572
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
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First, we can use flag.Args instead of flag.NArg and flag.Arg.
Second, just call filepath.WalkDir directly on each argument. We don't
need to check if each argument is a directory or not, since the function
will still work on regular files as expected.
To continue giving an error in the "gofmt does-not-exist.go" case, we
now need to return and handle errors from filepath.WalkDir, too.
Arguably, that should have always been the case.
While at it, I noticed that the printinf of the "diff" command did not
obey the "out" parameter. Fix that.
Finally, remove the code to ignore IsNotExist errors. It was added in CL
19301, though it didn't include tests and its reasoning is dubious.
Using gofmt on a directory treewhile another program is concurrently
editing or removing files is inherently racy. Hiding errors can hide
valid problems from the user, and such racy usages aren't supported.
Change-Id: I2e74cc04c53eeefb25231d804752b53562b97371
Reviewed-on: https://go-review.googlesource.com/c/go/+/284138
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Trust: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
If an error occurs in loading the module graph (such as a missing
checksum for a relevant go.mod file), that error should be terminal
and we should not look elsewhere to try to resolve the import. An
ImportMissingError instructs the caller to do exactly that, so don't
use that error type for this case.
(This behavior is tested incidentally in a later CL in this stack.)
For #36460
Change-Id: I963e39cc7fbc457c12a626c1402c0be29203d23b
Reviewed-on: https://go-review.googlesource.com/c/go/+/314633
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
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Reviewed-by: Michael Matloob <matloob@golang.org>
This is a port of CL 308371 to go/types. The only meaningful change from
that CL is to use explicit return values in Checker.indexExpr, which I
felt was more readable. I made the same change in types2 to keep them in
sync
Change-Id: I3380c03fe49d3bf4167cadad305abe942785af19
Reviewed-on: https://go-review.googlesource.com/c/go/+/314432
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
In the register allocator, if possible, we allocate a value to its
desired register (the ideal register for its next use). In some
cases the desired register does not satisfies the value's output
register mask. We should not use the register in this case.
In the following example, v33 is going to be returned as a
function result, so it is allocated to its desired register AX.
However, its Op cannot use AX as output, causing miscompilation.
v33 = CMOVQEQF <int> v24 v28 v29 : AX (~R0[int])
v35 = MakeResult <int,int,mem> v33 v26 v18
Ret v35
Change-Id: Id0f4f27c4b233ee297e83077e3c8494fe193e664
Reviewed-on: https://go-review.googlesource.com/c/go/+/314630
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
This CL adds a new flag to the testing package and the go test command
which randomizes the execution order for tests and benchmarks.
This can be useful for identifying unwanted dependencies
between test or benchmark functions.
The flag is off by default. If `-shuffle` is set to `on` then the system
clock will be used as the seed value. If `-shuffle` is set to an integer
N, then N will be used as the seed value. In both cases, the seed will
be reported for failed runs so that they can reproduced later on.
Fixes#28592
Change-Id: I62e7dfae5f63f97a0cbd7830ea844d9f7beac335
Reviewed-on: https://go-review.googlesource.com/c/go/+/310033
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Trust: Bryan C. Mills <bcmills@google.com>
Change-Id: I1a583d3da9cca4ac51f3fec9b508b7638b452d60
Reviewed-on: https://go-review.googlesource.com/c/go/+/314270
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
This will force a rebuild if the C/C++/Fortran compiler changes.
No test because a real test requires installing two different compilers.
Fixes#40042
Change-Id: I83cc88ade90d665a6fce06435068f39c811e43af
Reviewed-on: https://go-review.googlesource.com/c/go/+/314276
Trust: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
As with -rdynamic, clang will pass -Wl,--dynamic-linker to the linker
even when linking statically. When using lld this will produce a statically
linked executable with a dynamic interpreter, which will crash at runtime.
This CL changes the linker to drop -Wl,--dynamic-linker when using -static,
as it already does with -rdynamic.
This has become more important since CL 310349, which changes the linker
to always pass a -Wl,--dynamic-linker option if the Go linker is invoked
with a -I option.
Change-Id: I68ed431064f02c70018bc0547585e5b0ebd20a41
Reviewed-on: https://go-review.googlesource.com/c/go/+/314412
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Add the printGoEnv function to print the go environment variables, using
the envcmd package instead of invoking go env.
Add the PrintEnv function to the envcmd package, to avoid duplicating
code.
Updates #45803
Change-Id: I38d5b936c0ebb16e741ffbee4309b95d6d0ecc6c
Reviewed-on: https://go-review.googlesource.com/c/go/+/314230
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
The existing implementation ignores module info if there is any error loading the package.
Fixes#44287
Change-Id: I24142e4c7256517292fc654e29d759871b80bc09
GitHub-Last-Rev: 28e9bf85e8
GitHub-Pull-Request: golang/go#45777
Reviewed-on: https://go-review.googlesource.com/c/go/+/313549
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
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Trust: Michael Matloob <matloob@golang.org>
The external linker uses R12. Do the same. We previously use R11,
the temp register in Go ABI. This does not really matter if the
caller is Go code, because all registers are clobbered at call.
But it the caller is C code, it may assume R11 live across a call.
Using R11 may clobber live value. On the callee side, R12 is not
an argument register in both Go and C calling convention.
Change-Id: I958c5dad52aa51bb282a7ad420f5423863e69c14
Reviewed-on: https://go-review.googlesource.com/c/go/+/314454
Trust: Cherry Zhang <cherryyz@google.com>
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Reviewed-by: Than McIntosh <thanm@google.com>
In external linking mode the external linker may insert
trampolines, which use R12 as a scratch register. So a call could
potentially clobber R12 if the target is laid out too far. Mark
R12 clobbered.
Also, we will use R12 for trampolines in the Go linker as well.
CL 310731 updated the generated rewrite files so imports are
grouped, but the generator was not updated to do so. Grouped
imports are nice. But as those are generated files, for
simplicity and my laziness, just regenerate with the current
generator (which makes imports not grouped).
Change-Id: Iddb741ff7314a291ade5fbffc7d315f555808409
Reviewed-on: https://go-review.googlesource.com/c/go/+/314453
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
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Reviewed-by: Than McIntosh <thanm@google.com>
TOOLEXEC_IMPORTPATH is useful for the toolexec program to know what
package is currently being built. This is otherwise tricky to figure out.
Unfortunately, for test packages it was lacking. In the added test case,
we have a total of four packages in 'go list -test':
test/main
test/main.test
test/main [test/main.test]
test/main_test [test/main.test]
And, when running with -toolexec, one would get the following values:
# test/main_test [test/main.test]
compile TOOLEXEC_IMPORTPATH="test/main_test"
# test/main [test/main.test]
compile TOOLEXEC_IMPORTPATH="test/main"
# test/main.test
compile TOOLEXEC_IMPORTPATH="test/main.test"
Note how the " [test/main.test]" suffixes are missing. Because of that,
when one sees TOOLEXEC_IMPORTPATH="test/main", it is ambiguous whether
the regular "test/main" package is meant, or its test variant, otherwise
known as "test/main [test/main.test]" and including foo_test.go
To fix this, we need unambiguous strings to identify the packages
involved, just like one can do with "go list -test". "go list" already
has such a field, ImportPath, which is also used when printing output
from each build "action" as seen above.
That string is not really an import path - internally, it's
load.Package.Desc, and called a "description". However, it makes sense
to be consistent with "go list -json", because it's the source of truth
for practically all tools interacting with the Go toolchain.
To keep cmd/go more consistent, "go list -f {{.ImportPath}}" now calls
Package.Desc as well, instead of having its own copy of the string
concatenation for ForTest.
Fixes#44963.
Change-Id: Ibce7fbb5549209dac50526043c0c7daa0beebc08
Reviewed-on: https://go-review.googlesource.com/c/go/+/313770
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
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Trust: Daniel Martí <mvdan@mvdan.cc>
Add support for cgo on openbsd/mips64.
Fixes#43005
Change-Id: I2386204f53fa984a01a9d89f0b6c96455768f326
Reviewed-on: https://go-review.googlesource.com/c/go/+/275896
Trust: Joel Sing <joel@sing.id.au>
Run-TryBot: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
The current code lacks a check on whether the register and shift/extension
combination is valid, for example the follow instructions also compiles.
ADD F1<<1, R1, R3
ADD V1<<1, R1, R3
MOVW (R9)(F8.SXTW<<2), R19
VST1 R4.D[1], (R0)
Actually only general registers can perform shift operations, and element
and arrangement extensions are only applicable to vector registers. This
CL adds a check for the register and shift/extension combination on arm64.
Change-Id: I93dd9343e92a66899cba8eaf4e0ac5430e94692b
Reviewed-on: https://go-review.googlesource.com/c/go/+/312571
Trust: eric fang <eric.fang@arm.com>
Reviewed-by: eric fang <eric.fang@arm.com>
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: eric fang <eric.fang@arm.com>
TryBot-Result: Go Bot <gobot@golang.org>
The error message of checking whether the offset value of load/store
instruction is out of range is wrong. The right range is [-256, 255], not
[-255, 254]. The CL fixes it.
Change-Id: Ia342957f1f6bcec65eceb45944221d3972641bed
Reviewed-on: https://go-review.googlesource.com/c/go/+/313891
Reviewed-by: eric fang <eric.fang@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: eric fang <eric.fang@arm.com>
Run-TryBot: eric fang <eric.fang@arm.com>
In CL 255899, we added code to make clearer error when non-bool used
as operand to logical operators. The code is safe, because node type
is guaranteed to be non-nil.
In CL 279442, we refactored typechecking arith, including moving
typechecking logical operators to separate case. Now we have to
explicitly check if operand type is not nil, because calling Expr can
set operand type nil for non-bool operands.
Fixes#45804
Change-Id: Ie2b6e18f65c0614a803b343f60e78ee1d660bbeb
Reviewed-on: https://go-review.googlesource.com/c/go/+/314209
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Functional plugin support requires cgo to be enabled. Disable
it if the environment has disabled cgo.
This prevents unexpected linker failures when linking large
binaries with cgo disabled which use the plugin package.
Fixes#45564
Change-Id: Ib71f0e089f7373b7b3e3cd53da3612291e7bc473
Reviewed-on: https://go-review.googlesource.com/c/go/+/314449
Run-TryBot: Paul Murphy <murp@ibm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
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Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
This is a port of CL 308370 to go/types. There are some differences in
the index checking code, but the methodology for moving the code was the
same: replace `goto Error` with `x.mode = invalid; return`.
Change-Id: I880f577a7720e6ad8a5b096207001fcf7620396d
Reviewed-on: https://go-review.googlesource.com/c/go/+/312095
Trust: Robert Findley <rfindley@google.com>
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TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
According to the code comment, \ should be treated as a path separator.
See fileNameOK in golang.org/x/mod/module/module.go.
Change-Id: I05e05246005191ecccfecf46848aba5cb1359956
Reviewed-on: https://go-review.googlesource.com/c/go/+/310429
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Robert Findley <rfindley@google.com>
Also sleep a bit each time it fails, in case the system is overloaded.
Fixes#37332
Change-Id: Iabf3d0a27b5834c1e2a87c826b6206146b4f62c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/313849
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Ensure that formal parameter Names are correctly copied and marked
with the correct Curfn. We need to ensure this even when the underlying
closure has no type parameters.
(Aside: it is strange that the types of things contain formal
parameter names that need to be copied. Maybe that's an underlying
larger problem that needs to be fixed.)
Fixes#45738
Change-Id: Ia13d69eea992ff7080bd44065115bc52eb624e73
Reviewed-on: https://go-review.googlesource.com/c/go/+/313652
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
