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cmd/compile: miscompilation of value switch involving generic interface types #53477
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Change https://go.dev/cl/413394 mentions this issue: |
This test already passes for GOEXPERIMENT=unified; add regress test to ensure it stays that way. Updates #53477. Change-Id: Ib7aa7428260595077052207899edcc044a6ab1c8 Reviewed-on: https://go-review.googlesource.com/c/go/+/413394 Run-TryBot: Matthew Dempsky <mdempsky@google.com> Auto-Submit: Matthew Dempsky <mdempsky@google.com> Reviewed-by: David Chase <drchase@google.com>
Change https://go.dev/cl/413977 mentions this issue: |
Conflicts: - test/run.go Textual conflict adding to the known failures list for the nounified frontend. Merge List: + 2022-06-24 5a1c5b8 cmd/go: add per-package indexing for modules outside mod cache + 2022-06-24 b9c4d94 cmd/go/internal/list: update help info with Deprecated field + 2022-06-24 73475ef go/types, types2: print qualified object names in cycle errors + 2022-06-24 3e58ef6 go/types, types2: better errors for == when type sets are empty + 2022-06-24 d38f1d1 doc/go1.19: Linux race detector now requires glibc 2.17 + 2022-06-23 de5329f debug/dwarf: handle malformed line table with bad program offset + 2022-06-23 15605ca embed: document additional file name restrictions + 2022-06-22 2e773a3 test: add test that causes gofrontend crash + 2022-06-22 ff17b7d cmd/compile: don't use dictionary convert to shaped empty interface + 2022-06-22 2a3b467 cmd/go: make module .zip files group/world readable + 2022-06-22 bdab4cf cmd/go, cmd/link: support failure to create _cgo_import.go + 2022-06-22 aca37d1 cmd/go: avoid indexing modules in GOROOT + 2022-06-22 111cdb5 all: update to current golang.org/x/sys revision + 2022-06-22 4045b1b cmd/compile: fix assert condition in generic method call + 2022-06-22 6bad7e8 compress/gzip: always close bodyReader in Example_compressingReader + 2022-06-22 606c6c3 encoding/xml: check nil pointer in DecodeElement + 2022-06-22 f571518 cmd/cgo: dont override declared struct type + 2022-06-22 92c9b81 net: don't set netGo = true on Windows with no cgo + 2022-06-22 be0b2a3 cmd/trace: add basic documentation to main page + 2022-06-22 b004c73 go/types, types2: fix parameter order dependence in type inference + 2022-06-21 f2c7e78 spec: document operations which accept []byte|string constrained types + 2022-06-21 ab422f2 runtime/trace: ignore fallback stacks in test + 2022-06-21 66685fb doc/go1.19: use correct link to sync/atomic docs + 2022-06-21 4b236b4 runtime: convert flaky semaphore linearity test into benchmark + 2022-06-21 530511b cmd/go/internal/modindex: avoid walking modules when not needed + 2022-06-21 c2d373d cmd/compile: allow 128-bit values to be spilled + 2022-06-21 19ed442 test: add regress test for #53477 + 2022-06-20 3fcbfb0 doc/go1.19: fix HTML validation issues + 2022-06-18 527ace0 cmd/compile: skip substituting closures in unsafe builtins arguments + 2022-06-17 ec58e3f test: add regress test for #53419 + 2022-06-17 103cc66 cmd/go/internal/modfetch: prevent duplicate hashes in go.sum + 2022-06-17 d42a488 sync: add more notes about Cond behavior + 2022-06-17 9e2f289 cmd/go/internal/work: log clearer detail for subprocess errors in (*Builder).toolID + 2022-06-17 dd2d00f net: fix flaky *TimeoutMustNotReturn tests + 2022-06-17 6c25ba6 go/token: delete unused File.set field + 2022-06-16 9068c68 cmd/dist: add package . to 'go test' commands + 2022-06-16 7bad615 runtime: write much more direct test for semaphore waiter scalability + 2022-06-16 f38a580 cmd/go: add more tracing Change-Id: I912c5879165e03f4d7f8ac3ee9241d50fc92a419
@randall77 did you see this yet? |
Change https://go.dev/cl/414834 mentions this issue: |
Do we think this needs a backport to 1.18? |
@dr2chase I think so. @gopherbot Please backport to Go 1.18. This is a silent miscompilation of valid Go code. |
Backport issue(s) opened: #53587 (for 1.18). Remember to create the cherry-pick CL(s) as soon as the patch is submitted to master, according to https://go.dev/wiki/MinorReleases. |
This test already passes for GOEXPERIMENT=unified; add regress test to ensure it stays that way. Updates golang#53477. Change-Id: Ib7aa7428260595077052207899edcc044a6ab1c8 Reviewed-on: https://go-review.googlesource.com/c/go/+/413394 Run-TryBot: Matthew Dempsky <mdempsky@google.com> Auto-Submit: Matthew Dempsky <mdempsky@google.com> Reviewed-by: David Chase <drchase@google.com>
…atements If value is a non-empty interface and has shape, we still need to convert it to an interface{} first. Fixes golang#53477 Change-Id: I516063ba4429a6cc24c483758387ec13815fc63e Reviewed-on: https://go-review.googlesource.com/c/go/+/414834 Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com> Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
This test already passes for GOEXPERIMENT=unified; add regress test to ensure it stays that way. Updates golang#53477. Change-Id: Ib7aa7428260595077052207899edcc044a6ab1c8 Reviewed-on: https://go-review.googlesource.com/c/go/+/413394 Run-TryBot: Matthew Dempsky <mdempsky@google.com> Auto-Submit: Matthew Dempsky <mdempsky@google.com> Reviewed-by: David Chase <drchase@google.com>
…atements If value is a non-empty interface and has shape, we still need to convert it to an interface{} first. Fixes golang#53477 Change-Id: I516063ba4429a6cc24c483758387ec13815fc63e Reviewed-on: https://go-review.googlesource.com/c/go/+/414834 Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com> Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
https://go.dev/play/p/03EsH4Y3wv3
The above program should terminate quietly with success. However, in Go 1.18, it instead silently miscompiles into code that at runtime panics:
Since this is a silent miscompilation, I think a fix and backport are appropriate. Ideally fix it to compile correctly, but even changing it to ICE would be preferable IMO.
/cc @randall77 @dr2chase @cuonglm
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