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In the presence of invalid UTF-8, the AllowInvalidUTF8 option
allows such bytes to be present, but silently mangles them
using the Unicode replacement character.
The v2 default is to emit the replacement character verbatim
(which is valid UTF-8 and exactly what it is for).
However, the v1 behavior has historically been to emit
the escaped form of the replacement character.
This behavior was introduced in https://go.dev/cl/11211045
where the documentation says that it is:
replacing invalid bytes with the Unicode replacement rune U+FFFD
but the implementation actually replaces it with
the escaped form of the Unicode replacement rune.
Given that the documentation differs from the implementation,
the actual behavior is likely an oversight.
Given how esoteric of behavior this is,
we change the v1in2 behavior to avoid the unnecesary escaping
and drop support for EscapeInvalidUTF8.
This does not violate the Go compatibility agreement since
we do not document what the exact syntactic output is.
Also, there has already been prior precedence for changing the output:
* [encoding/json: encode \b and \f as '\b' and '\f' in JSON strings](https://go.dev/cl/521675)
* [encoding/json: encode \n in strings as "\n", not "\u000A"](https://go.dev/cl/4678046)
* [encoding/json: encode \t as \t instead of \u0009](https://go.dev/cl/162340043)
* [encoding/json: use standard ES6 formatting for numbers during marshal](https://go.dev/cl/30371)
Fixes #74551
Change-Id: Ib59a873c44713d302f1f6ab103ffba2520d63276
Reviewed-on: https://go-review.googlesource.com/c/go/+/687116
Auto-Submit: Joseph Tsai <joetsai@digital-static.net>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
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The default representation of a time.Duration is still undecided.
In order to keep the future open, report an error on a time.Duration
without an explicit format flag provided.
Updates #71631
Change-Id: I08248404ff6551723851417c8188a13f53c61937
Reviewed-on: https://go-review.googlesource.com/c/go/+/682455
Auto-Submit: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
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This imports the proposed new v2 JSON API implemented in
github.com/go-json-experiment/json as of commit
d3c622f1b874954c355e60c8e6b6baa5f60d2fed.
When GOEXPERIMENT=jsonv2 is set, the encoding/json/v2 and
encoding/jsontext packages are visible, the encoding/json
package is implemented in terms of encoding/json/v2, and
the encoding/json package include various additional APIs.
(See #71497 for details.)
When GOEXPERIMENT=jsonv2 is not set, the new API is not
present and the encoding/json package is unchanged.
The experimental API is not bound by the Go compatibility
promise and is expected to evolve as updates are made to
the json/v2 proposal.
The contents of encoding/json/internal/jsontest/testdata
are compressed with zstd v1.5.7 with the -19 option.
Fixes #71845
For #71497
Change-Id: Ib8c94e5f0586b6aaa22833190b41cf6ef59f4f01
Reviewed-on: https://go-review.googlesource.com/c/go/+/665796
Auto-Submit: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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