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Bryan C. Mills b9540246ba cmd/go: disallow the -fuzz flag for tests outside the main module
Normally, when fuzzing identifies a failure it saves the failing input
to the package's testdata directory. However, the testdata directory
for packages outside the main module is normally not writable — and
when it is, writing to a testdata directory inside the module cache
would corrupt the checksum for that module (and permanently alter the
behavior of that version of the module globally).

In the future we could consider a flag to allow failures to be saved
to an alternate location, or perhaps in the build cache; or, we could
suppress writes entirely and rely on the user to identify and copy the
failing input from the test log. However, it's a bit late in the cycle
for that big a design decision right now. For Go 1.18, we will just
enforce that the package to be fuzzed resides in the main module,
which is typically a writable VCS checkout.

Fixes #48495

Change-Id: I8d3d56372394b1aaa94fa920399c659363fa17fa
Reviewed-on: https://go-review.googlesource.com/c/go/+/359414
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
2021-10-28 20:43:39 +00:00
.github .github: update IRC server 2021-09-30 19:56:27 +00:00
api cmd/go: stamp VCS revision and uncommitted status into binaries 2021-10-14 18:44:37 +00:00
doc doc/go1.18: document Fossil/Bazaar and commit time build tag support 2021-10-27 21:37:54 +00:00
lib/time lib/time: fix RFC 6557 url 2021-08-15 02:18:46 +00:00
misc cmd/go: remove support for -buildmode=shared 2021-10-27 20:03:17 +00:00
src cmd/go: disallow the -fuzz flag for tests outside the main module 2021-10-28 20:43:39 +00:00
test cmd/compile: allow inlining of ORANGE 2021-10-28 14:25:03 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
AUTHORS net/http: guarantee that the Transport dial functions are respected in js/wasm 2021-10-28 17:57:57 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS net/http: guarantee that the Transport dial functions are respected in js/wasm 2021-10-28 17:57:57 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS
README.md README.md: update contribute URL 2021-09-30 13:33:21 +00:00
SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00

README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

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