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cmd/compile: internal compiler error: panic: runtime error: invalid memory address or nil pointer dereference [1.19 backport] #54309

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gopherbot opened this issue Aug 5, 2022 · 6 comments
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cmd/compile: internal compiler error: panic: runtime error: invalid memory address or nil pointer dereference [1.19 backport] #54309

gopherbot opened this issue Aug 5, 2022 · 6 comments
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CherryPickApproved Used during the release process for point releases compiler/runtime Issues related to the Go compiler and/or runtime. FrozenDueToAge
Milestone
Go1.19.1

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@gopherbot
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@mdempsky requested issue #54302 to be considered for backport to the next 1.19 minor release.

@gopherbot Please backport to Go 1.19. This is a regression from Go 1.18.
@gopherbot gopherbot added the CherryPickCandidate Used during the release process for point releases label Aug 5, 2022
@gopherbot gopherbot mentioned this issue Aug 5, 2022
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@gopherbot gopherbot added the compiler/runtime Issues related to the Go compiler and/or runtime. label Aug 5, 2022
@gopherbot gopherbot added this to the Go1.19.1 milestone Aug 5, 2022
@gopherbot
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Change https://go.dev/cl/421715 mentions this issue: [release-branch.go1.19] cmd/compile: fix import/export of ODYNAMICDOTTYPE

@borzovplus
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Any updates? I have the same problem in 1.18.5 and in 1.19

@randall77
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@borzovplus The fix will be available in 1.19.1 when it comes out (a few weeks). I'm not sure about whether this will be fixed in 1.18 or not. @mdempsky

@mdempsky
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mdempsky commented Aug 8, 2022

Thanks. I've reopened #54308 to discuss 1.18 backport.

@borzovplus
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@borzovplus The fix will be available in 1.19.1 when it comes out (a few weeks). I'm not sure about whether this will be fixed in 1.18 or not. @mdempsky

oh, so long...

@joedian joedian added CherryPickApproved Used during the release process for point releases and removed CherryPickCandidate Used during the release process for point releases labels Aug 10, 2022
@gopherbot
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Closed by merging 3c200d6 to release-branch.go1.19.

gopherbot pushed a commit that referenced this issue Aug 11, 2022
@mdempsky @thanm
[release-branch.go1.19] cmd/compile: fix import/export of ODYNAMICDOT…
3c200d6 
…TYPE

The RType field isn't needed when performing type assertions from
non-empty interface types, because we use the ITab field instead. But
the inline body exporter didn't know to expect this.

It's possible we could use a single bool to distinguish whether
we're serializing the RType or ITab field, but using two is simpler
and seems safer.

Fixes #54309.

Change-Id: I9ddac72784fb2241fee0a0dee30493d868a2c259
Reviewed-on: https://go-review.googlesource.com/c/go/+/421755
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
(cherry picked from commit 0c4db1e)
Reviewed-on: https://go-review.googlesource.com/c/go/+/421715
Reviewed-by: Than McIntosh <thanm@google.com>
bradfitz pushed a commit to tailscale/go that referenced this issue Sep 8, 2022
@mdempsky @bradfitz
[release-branch.go1.19] cmd/compile: fix import/export of ODYNAMICDOT…
741e980 
…TYPE

The RType field isn't needed when performing type assertions from
non-empty interface types, because we use the ITab field instead. But
the inline body exporter didn't know to expect this.

It's possible we could use a single bool to distinguish whether
we're serializing the RType or ITab field, but using two is simpler
and seems safer.

Fixes golang#54309.

Change-Id: I9ddac72784fb2241fee0a0dee30493d868a2c259
Reviewed-on: https://go-review.googlesource.com/c/go/+/421755
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
(cherry picked from commit 0c4db1e)
Reviewed-on: https://go-review.googlesource.com/c/go/+/421715
Reviewed-by: Than McIntosh <thanm@google.com>
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