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cmd/compile, runtime, reflect: pointers to go:notinheap types must be stored indirectly in interfaces [1.15 backport] #42169

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gopherbot opened this issue Oct 23, 2020 · 2 comments
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cmd/compile, runtime, reflect: pointers to go:notinheap types must be stored indirectly in interfaces [1.15 backport] #42169

gopherbot opened this issue Oct 23, 2020 · 2 comments
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CherryPickApproved release-blocker
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Go1.15.4

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@gopherbot gopherbot commented Oct 23, 2020

@randall77 requested issue #42076 to be considered for backport to the next 1.15 minor release.

@gopherbot Please open a backport issue for 1.15.
@gopherbot gopherbot mentioned this issue Oct 23, 2020
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@gopherbot gopherbot added this to the Go1.15.4 milestone Oct 23, 2020
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@gopherbot gopherbot commented Oct 27, 2020

Change https://golang.org/cl/265720 mentions this issue: cmd/compile, runtime: store pointers to go:notinheap types indirectly
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@gopherbot gopherbot commented Oct 27, 2020

Closed by merging 255afa2 to release-branch.go1.15.
@gopherbot gopherbot closed this Oct 27, 2020
gopherbot pushed a commit that referenced this issue Oct 27, 2020
@randall77 @ianlancetaylor
[release-branch.go1.15] cmd/compile, runtime: store pointers to go:no…
255afa2 
…tinheap types indirectly

pointers to go:notinheap types should be treated as scalars. That
means they shouldn't be stored directly in interfaces, or directly
in reflect.Value.ptr.

Also be sure to use uintpr to compare such pointers in reflect.DeepEqual.

Fixes #42169

Change-Id: I53735f6d434e9c3108d4940bd1bae14c61ef2a74
Reviewed-on: https://go-review.googlesource.com/c/go/+/264480
Trust: Keith Randall <khr@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
(cherry picked from commit 009d714)
Reviewed-on: https://go-review.googlesource.com/c/go/+/265720
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
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