The empty Write will cause the wrong thing to happen when using
io.Copy to copy to a package-based stream.
Fixes#71424
Change-Id: I046a27539447182692ac76a8bdd422327345dd8d
Reviewed-on: https://go-review.googlesource.com/c/go/+/644535
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Reviewed-by: Damien Neil <dneil@google.com>
Previously, based on the description, it was not obvious that Peek could
change the buffer. It may have been mistakenly assumed that Peek would
always return an error if n is greater than b.Buffered().
Change-Id: I095006dd2ba1c2138bb193396cb24e2dda42d771
GitHub-Last-Rev: 9d48f8ac81
GitHub-Pull-Request: golang/go#70712
Reviewed-on: https://go-review.googlesource.com/c/go/+/634175
Reviewed-by: Carlos Amedee <carlos@golang.org>
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Reviewed-by: Jorropo <jorropo.pgm@gmail.com>
Change-Id: Ia4fbb436ca573b1820f2b4d06d2332f588334768
Reviewed-on: https://go-review.googlesource.com/c/go/+/624357
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Reviewed-by: Ian Lance Taylor <iant@google.com>
First, skip all the allocation count tests.
In some cases this aligns with existing skips for -race, but in others
we've got new issues. These are debug modes, so some performance loss is
expected, and this is clearly no worse than today where the tests fail.
Next, skip internal linking and static linking tests for msan and asan.
With asan we get an explicit failure that neither are supported by the C
and/or Go compilers. With msan, we only get the Go compiler telling us
internal linking is unavailable. With static linking, we segfault
instead. Filed #70080 to track that.
Next, skip some malloc tests with asan that don't quite work because of
the redzone.
This is because of some sizeclass assumptions that get broken with the
redzone and the fact that the tiny allocator is effectively disabled
(again, due to the redzone).
Next, skip some runtime/pprof tests with asan, because of extra
allocations.
Next, skip some malloc tests with asan that also fail because of extra
allocations.
Next, fix up memstats accounting for arenas when asan is enabled. There
is a bug where more is added to the stats than subtracted. This also
simplifies the accounting a little.
Next, skip race tests with msan or asan enabled; they're mutually
incompatible.
Fixes#70054.
Fixes#64256.
Fixes#64257.
For #70079.
For #70080.
Change-Id: I99c02a0b9d621e44f1f918b307aa4a4944c3ec60
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-asan-clang15,gotip-linux-amd64-msan-clang15
Reviewed-on: https://go-review.googlesource.com/c/go/+/622855
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TryBot-Bypass: Michael Knyszek <mknyszek@google.com>
All changes are related to the code, except for the comments in src/regexp/syntax/parse.go and src/slices/slices.go.
Change-Id: I73c5d3c54099749b62210aa7f3182c5eb84bb6a6
GitHub-Last-Rev: 794aa9b053
GitHub-Pull-Request: golang/go#69170
Reviewed-on: https://go-review.googlesource.com/c/go/+/609678
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Fixes#56381
Change-Id: I95cd603831a7032d764ab312869fe9fb05848a4b
Reviewed-on: https://go-review.googlesource.com/c/go/+/498117
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Change-Id: Id0a4f5716da98008eec10eee05b74fc2a155ba3c
Reviewed-on: https://go-review.googlesource.com/c/go/+/535216
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
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Auto-Submit: Ian Lance Taylor <iant@google.com>
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Change-Id: Id32bae57c9fcc2074f82089ba9c69be9a601f128
Reviewed-on: https://go-review.googlesource.com/c/go/+/534758
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Run-TryBot: shuang cui <imcusg@gmail.com>
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This is a follow up of CL 528696.
Change-Id: I5b71eabedb12567c4b1b36f7182a3d2b0ed662a5
GitHub-Last-Rev: acaf3ac11c
GitHub-Pull-Request: golang/go#62713
Reviewed-on: https://go-review.googlesource.com/c/go/+/529197
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Fixes#43183.
Change-Id: I50d99ef8ed513bba47166a25ea5c7c80cd8bd799
GitHub-Last-Rev: 684d70e9a3
GitHub-Pull-Request: golang/go#61979
Reviewed-on: https://go-review.googlesource.com/c/go/+/518860
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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This can happen in reasonable code because NewReader(r) can return r,
if r is already a Reader.
Similarly for Writer.
Fixes#58423
Change-Id: Iff9d9265410bee68fbaeb7175369847bd737eb2c
Reviewed-on: https://go-review.googlesource.com/c/go/+/466815
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Change-Id: Ic21d979da8be1a6047b9bcd65b5ee71ca2ef7548
Reviewed-on: https://go-review.googlesource.com/c/go/+/435278
Reviewed-by: Robert Griesemer <gri@google.com>
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Change-Id: Ief82f12a5c48c46165c28140997d5fc83700c758
Reviewed-on: https://go-review.googlesource.com/c/go/+/428256
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Fixes#52577
Change-Id: Idaff2604979f9a9c1c7d3140c8a5d218fcd27a56
Reviewed-on: https://go-review.googlesource.com/c/go/+/403594
Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Bryan Mills <bcmills@google.com>
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Currently bufio.Writer implements forwarding to the underlying Writer
for large writes via Write, but it does not do the same for large
writes via WriteString.
If the underlying Writer is also a StringWriter, use the same "large
writes" logic also in WriteString while taking care to only check
once per call to WriteString whether the underlying Writer implements
StringWriter.
Change-Id: Id81901c07b035936816b9e41b1f5688e699ee8e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/380074
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A future change to gofmt will rewrite
// Doc comment.
//
func f()
to
// Doc comment.
func f()
Apply that change preemptively to all doc comments.
For #51082.
Change-Id: I4023e16cfb0729b64a8590f071cd92f17343081d
Reviewed-on: https://go-review.googlesource.com/c/go/+/384259
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Fixes#49795
Change-Id: I2b4fd14f0ed36b643522559bebf5ce52b1d7b304
Reviewed-on: https://go-review.googlesource.com/c/go/+/367214
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Fixes#49446
Change-Id: Ib0b53a7dd5d567a2dd0bdf29f53d276587b60afb
Reviewed-on: https://go-review.googlesource.com/c/go/+/361921
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Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
When (*bufio.Writer).ReadFrom is called with a partially filled buffer,
fill out and flush the buffer and then call the underlying writer's
ReadFrom method if present.
Fixes#44815.
Change-Id: I15b3ef0746d0d60fd62041189a9b9df11254dd29
Reviewed-on: https://go-review.googlesource.com/c/go/+/340530
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Discard is not really a read operation, and in theory it could
Seek the underlying Reader without actually reading anything,
so an UnreadByte following a Discard is disallowed.
Similarly, although WriteTo usually does end up calling Read on the
underlying buffer, if the underlying Reader implements io.WriterTo it
may instead terminate in a call to WriteTo, without ever buffering or
even seeing the last byte written. (It is conceptually read-like, but
not strictly “a read operation”.)
Fixes#48446
Change-Id: Ide6f2b157332b423486810399f66140c914144e5
Reviewed-on: https://go-review.googlesource.com/c/go/+/351810
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Joe Tsai <joetsai@digital-static.net>
Reviewed-by: Joe Tsai <joetsai@digital-static.net>
This adds a new Writer.AvailableBuffer method that returns
an empty buffer with a possibly non-empty capacity for use
with append-like APIs.
The typical usage pattern is something like:
b := bw.AvailableBuffer()
b = appendValue(b, v)
bw.Write(b)
It allows logic combining append-like APIs with bufio.Writer to avoid
needing to allocate and manage buffers themselves and allows the
append-like APIs to directly write into the buffer for a bufio.Writer.
Fixes#47527
Change-Id: I9cd169f3f8e8c7cd40818caf3daf1944c826fc66
Reviewed-on: https://go-review.googlesource.com/c/go/+/345569
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For batch allocation reasons, it would be useful to nest a
bufio.Reader or bufio.Writer in a struct as a value,
rather than a pointer. When the Reset method is called,
have it use the default buffer size if the buffer is nil.
Fixes#45374
Change-Id: I80df18a13575431428a42ed150a1579de1282637
Reviewed-on: https://go-review.googlesource.com/c/go/+/345570
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It is documented elsewhere in the package documentation but this additional
mention of it will hopefully reduce confusion.
Fixes#44261
Change-Id: I4e9d8f4564ebb7fbe047c92ee2cdffedb39f2a31
GitHub-Last-Rev: 64b6421503
GitHub-Pull-Request: golang/go#45839
Reviewed-on: https://go-review.googlesource.com/c/go/+/314969
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
The old ioutil references are still valid, but update our code
to reflect best practices and get used to the new locations.
Code compiled with the bootstrap toolchain
(cmd/asm, cmd/dist, cmd/compile, debug/elf)
must remain Go 1.4-compatible and is excluded.
Also excluded vendored code.
For #41190.
Change-Id: I6d86f2bf7bc37a9d904b6cee3fe0c7af6d94d5b1
Reviewed-on: https://go-review.googlesource.com/c/go/+/263142
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CL 225357 added tests for Scanner not panicking on bad readers.
CL 225557 created a named error value that is returned instead.
CL 237739 documents that the bufio.ErrBadReadCount is returned
when bufio.Scanner is used with an invalid io.Reader.
This suggests we wouldn't want that behavior to be able to change
without a test noticing it, so modify the tests to check for the
exact error value instead of just any non-nil one.
For #38053.
Change-Id: I4b0b8eb6804ebfe2c768505ddb94f0b1017fcf8b
Reviewed-on: https://go-review.googlesource.com/c/go/+/238217
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Make the code more consistent with the rest of the file.
Should have caught this in review of CL 225357.
Change-Id: I12824cb436539c31604684e043ebb7587cc92471
Reviewed-on: https://go-review.googlesource.com/c/go/+/225557
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Instead use string(r) where r has type rune.
This is in preparation for a vet warning for string(i).
Updates #32479
Change-Id: Ic205269bba1bd41723950219ecfb67ce17a7aa79
Reviewed-on: https://go-review.googlesource.com/c/go/+/220844
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If a previous Write returned an error, any subsequent Write or ReadFrom
must return that error before any operations.
However, only Write behaved correctly and this change fixes that problem
by making sure that ReadFrom firstly checks for the underlying error.
Fixes#35194
Change-Id: I31356a9e8bd945bc0168b2e3be470f3ae69d4813
Reviewed-on: https://go-review.googlesource.com/c/go/+/204000
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Change-Id: I4a5c7573e13dd85531ee9f4dd2a0d1981bf8cdfa
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If reading 0 bytes, don't return the error from the underlying
io.Reader if there is still data buffered.
Fixes#32693
Change-Id: I12a97bd6003c638c15d41028942f27edf88340e2
Reviewed-on: https://go-review.googlesource.com/c/go/+/182997
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Apologies for the the nitpicky PR. I believe there is a minor typo in the documentation of `MaxScanTokenSize`, which confused me for a moment when I went to search for the referenced method, `Scan.Buffer`. Thanks!
Change-Id: I5d21e77276285206497fe75291001032c255cace
GitHub-Last-Rev: 635e35c019
GitHub-Pull-Request: golang/go#32193
Reviewed-on: https://go-review.googlesource.com/c/go/+/178637
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Since Reader.Peek potentially reads from the underlying io.Reader,
discarding previous buffers, UnreadRune and UnreadByte cannot
necessarily work. Change Peek to invalidate the unread buffers in all
cases (as allowed according to the documentation) and thus prevent
hiding bugs in the caller.
(This change was previoiusly merged and then reverted due concern about
being too close to a release)
Fixes#18556
Change-Id: I9027d75aa834d4b27703f37711ba25de04d89f3c
GitHub-Last-Rev: 917ef1e511
GitHub-Pull-Request: golang/go#28768
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CL 145577 added the part about io.ReadFull to read len(p)
but it should be next to the existing sentence about not
reading len(p) bytes.
Change-Id: Idfa037c59a3085d44d5da6129188473db0e96d23
Reviewed-on: https://go-review.googlesource.com/c/148903
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Many times when using bufio.Reader I imagine, incorrectly, that it
implements the retry loop itself, being a high-level buffered wrapper
around, say, a file descriptor prone to short reads. This comment
would have saved me much time.
Change-Id: I34c790e0d7c1515430a76d02ce4739b586a36ba7
Reviewed-on: https://go-review.googlesource.com/c/145577
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
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