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Fixed #64930
Change-Id: I916de7f97116fb20cb2f3f0b425ac34409afd494
Reviewed-on: https://go-review.googlesource.com/c/go/+/553436
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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E.g.
`GOEXPERIMENT=rangefunc go test -v -gcflags=-d=rangefunccheck=0 rangefunc_test.go`
will turn off the checking and fail.
The benchmarks, which do not use pathological iterators, run slightly faster.
Change-Id: Ia3e175e86d67ef74bbae9bcc5d2def6a2cdf519d
Reviewed-on: https://go-review.googlesource.com/c/go/+/541995
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
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When this happens, panic.
This is a revised version of a check that used #next,
where this one instead uses a per-loop #exit flag,
and catches more problematic iterators.
Updates #56413.
Updates #61405.
Change-Id: I6574f754e475bb67b9236b4f6c25979089f9b629
Reviewed-on: https://go-review.googlesource.com/c/go/+/540263
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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This was originally done for a #next-encoding-based check for
misbehaving loops, but it's a good idea anyhow because it makes
the code slightly easier to follow or change (we may decide to
check for errors the "other way" anyhow, later).
Change-Id: I2ba8f6e0f9146f0ff148a900eabdefd0fffebf8b
Reviewed-on: https://go-review.googlesource.com/c/go/+/540261
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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Add compiler support for range over functions.
See the large comment at the top of
cmd/compile/internal/rangefunc/rewrite.go for details.
This is only reachable if GOEXPERIMENT=range is set,
because otherwise type checking will fail.
For proposal #61405 (but behind a GOEXPERIMENT).
For #61717.
Change-Id: I05717f94e63089c503acc49b28b47edeb4e011b4
Reviewed-on: https://go-review.googlesource.com/c/go/+/510541
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
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