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cmd/compile: could not import "package" (cannot import "package" (type parameter bound more than once), possibly version skew - reinstall package) [1.18 backport] #51847

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gopherbot opened this issue Mar 21, 2022 · 3 comments
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cmd/compile: could not import "package" (cannot import "package" (type parameter bound more than once), possibly version skew - reinstall package) [1.18 backport] #51847

gopherbot opened this issue Mar 21, 2022 · 3 comments
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CherryPickApproved Used during the release process for point releases FrozenDueToAge
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Go1.18.1

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@gopherbot
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@ianlancetaylor requested issue #51836 to be considered for backport to the next 1.18 minor release.

@gopherbot Please open backport to 1.18

This seems to be a compiler error on valid code.
@gopherbot gopherbot added the CherryPickCandidate Used during the release process for point releases label Mar 21, 2022
@gopherbot gopherbot mentioned this issue Mar 21, 2022
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@gopherbot gopherbot added this to the Go1.18.1 milestone Mar 21, 2022
@gopherbot
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Change https://go.dev/cl/394854 mentions this issue: cmd/compile/internal/importer: key tparams by Package instead of pkgname

@toothrot toothrot added the CherryPickApproved Used during the release process for point releases label Mar 23, 2022
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Approved. This is a serious issue with no workaround.

@gopherbot gopherbot removed the CherryPickCandidate Used during the release process for point releases label Mar 23, 2022
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Closed by merging 69bc821 to release-branch.go1.18.

gopherbot pushed a commit that referenced this issue Apr 4, 2022
@findleyr @cherrymui
[release-branch.go1.18] cmd/compile/internal/importer: key tparams by…
69bc821 
… Package instead of pkgname

The importer type param index used package name as type parameter key,
causing type parameters to be reused/overwritten if two packages in the
import graph had the same combination of (package name, declaration
name, type parameter name).

Fix this by instead using the *Package in the key.

Note: -G=3 was added to typeparam/issue51836.go, as it is necessary for
1.18 but not for tip.

For #51836
Fixes #51847

Change-Id: I881ceaf3cf7c1ab4e0835962350feb552e79b233
Reviewed-on: https://go-review.googlesource.com/c/go/+/394219
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
(cherry picked from commit fd1b590)
Reviewed-on: https://go-review.googlesource.com/c/go/+/394854
@dcasota dcasota mentioned this issue May 25, 2022
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