Revert "[FlowSensitive] [StatusOr] [2/N] Add minimal model" #164040
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This reverts commit fe02993.
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@llvm/pr-subscribers-clang @llvm/pr-subscribers-clang-analysis Author: Florian Mayer (fmayer) ChangesReverts llvm/llvm-project#162932 Patch is 88.11 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/164040.diff 9 Files Affected:
diff --git a/clang/include/clang/Analysis/FlowSensitive/Models/UncheckedStatusOrAccessModel.h b/clang/include/clang/Analysis/FlowSensitive/Models/UncheckedStatusOrAccessModel.h
deleted file mode 100644
index cb619fb0cb5bb..0000000000000
--- a/clang/include/clang/Analysis/FlowSensitive/Models/UncheckedStatusOrAccessModel.h
+++ /dev/null
@@ -1,112 +0,0 @@
-//===- UncheckedStatusOrAccessModel.h -------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef CLANG_ANALYSIS_FLOWSENSITIVE_MODELS_UNCHECKEDSTATUSORACCESSMODEL_H
-#define CLANG_ANALYSIS_FLOWSENSITIVE_MODELS_UNCHECKEDSTATUSORACCESSMODEL_H
-
-#include "clang/AST/Type.h"
-#include "clang/ASTMatchers/ASTMatchers.h"
-#include "clang/Analysis/CFG.h"
-#include "clang/Analysis/FlowSensitive/CFGMatchSwitch.h"
-#include "clang/Analysis/FlowSensitive/DataflowAnalysis.h"
-#include "clang/Analysis/FlowSensitive/DataflowEnvironment.h"
-#include "clang/Analysis/FlowSensitive/MatchSwitch.h"
-#include "clang/Analysis/FlowSensitive/NoopLattice.h"
-#include "clang/Analysis/FlowSensitive/StorageLocation.h"
-#include "clang/Analysis/FlowSensitive/Value.h"
-#include "clang/Basic/SourceLocation.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/ADT/StringRef.h"
-
-namespace clang::dataflow::statusor_model {
-
-// The helper functions exported here are for use of downstream vendor
-// extensions of this model.
-
-// Match declaration of `absl::StatusOr<T>` and bind `T` to "T".
-clang::ast_matchers::DeclarationMatcher statusOrClass();
-// Match declaration of `absl::Status`.
-clang::ast_matchers::DeclarationMatcher statusClass();
-// Match declaration of `absl::internal_statusor::OperatorBase`.
-clang::ast_matchers::DeclarationMatcher statusOrOperatorBaseClass();
-clang::ast_matchers::TypeMatcher statusOrType();
-
-// Get RecordStorageLocation for the `Status` contained in the `StatusOr`
-RecordStorageLocation &locForStatus(RecordStorageLocation &StatusOrLoc);
-// Get the StorageLocation for the OK boolean in the `Status`
-StorageLocation &locForOk(RecordStorageLocation &StatusLoc);
-// Get the OK boolean in the `Status`, and initialize it if necessary.
-BoolValue &valForOk(RecordStorageLocation &StatusLoc, Environment &Env);
-// Get synthetic fields for the types modelled by
-// `UncheckedStatusOrAccessModel`.
-llvm::StringMap<QualType> getSyntheticFields(QualType Ty, QualType StatusType,
- const CXXRecordDecl &RD);
-
-// Initialize the synthetic fields of the `StatusOr`.
-// N.B. if it is already initialized, the value gets reset.
-BoolValue &initializeStatusOr(RecordStorageLocation &StatusOrLoc,
- Environment &Env);
-// Initialize the synthetic fields of the `Status`.
-// N.B. if it is already initialized, the value gets reset.
-BoolValue &initializeStatus(RecordStorageLocation &StatusLoc, Environment &Env);
-
-bool isRecordTypeWithName(QualType Type, llvm::StringRef TypeName);
-// Return true if `Type` is instantiation of `absl::StatusOr<T>`
-bool isStatusOrType(QualType Type);
-// Return true if `Type` is `absl::Status`
-bool isStatusType(QualType Type);
-
-// Get `QualType` for `absl::Status`, or default-constructed
-// QualType if it does not exist.
-QualType findStatusType(const ASTContext &Ctx);
-
-struct UncheckedStatusOrAccessModelOptions {};
-
-// Dataflow analysis that discovers unsafe uses of StatusOr values.
-class UncheckedStatusOrAccessModel
- : public DataflowAnalysis<UncheckedStatusOrAccessModel, NoopLattice> {
-public:
- explicit UncheckedStatusOrAccessModel(ASTContext &Ctx, Environment &Env);
-
- static Lattice initialElement() { return {}; }
-
- void transfer(const CFGElement &Elt, Lattice &L, Environment &Env);
-
-private:
- CFGMatchSwitch<TransferState<Lattice>> TransferMatchSwitch;
-};
-
-using LatticeTransferState =
- TransferState<UncheckedStatusOrAccessModel::Lattice>;
-
-// Extend the Builder with the transfer functions for
-// `UncheckedStatusOrAccessModel`. This is useful to write downstream models
-// that extend the model.
-CFGMatchSwitch<LatticeTransferState>
-buildTransferMatchSwitch(ASTContext &Ctx,
- CFGMatchSwitchBuilder<LatticeTransferState> Builder);
-
-class UncheckedStatusOrAccessDiagnoser {
-public:
- explicit UncheckedStatusOrAccessDiagnoser(
- UncheckedStatusOrAccessModelOptions Options = {});
-
- llvm::SmallVector<SourceLocation> operator()(
- const CFGElement &Elt, ASTContext &Ctx,
- const TransferStateForDiagnostics<UncheckedStatusOrAccessModel::Lattice>
- &State);
-
-private:
- CFGMatchSwitch<const Environment, llvm::SmallVector<SourceLocation>>
- DiagnoseMatchSwitch;
-};
-
-} // namespace clang::dataflow::statusor_model
-
-#endif // CLANG_ANALYSIS_FLOWSENSITIVE_MODELS_UNCHECKEDSTATUSORACCESSMODEL_H
diff --git a/clang/lib/Analysis/FlowSensitive/Models/CMakeLists.txt b/clang/lib/Analysis/FlowSensitive/Models/CMakeLists.txt
index d1236f5714881..89bbe8791eb2c 100644
--- a/clang/lib/Analysis/FlowSensitive/Models/CMakeLists.txt
+++ b/clang/lib/Analysis/FlowSensitive/Models/CMakeLists.txt
@@ -1,7 +1,6 @@
add_clang_library(clangAnalysisFlowSensitiveModels
ChromiumCheckModel.cpp
UncheckedOptionalAccessModel.cpp
- UncheckedStatusOrAccessModel.cpp
LINK_LIBS
clangAnalysis
diff --git a/clang/lib/Analysis/FlowSensitive/Models/UncheckedStatusOrAccessModel.cpp b/clang/lib/Analysis/FlowSensitive/Models/UncheckedStatusOrAccessModel.cpp
deleted file mode 100644
index 75b0959491c22..0000000000000
--- a/clang/lib/Analysis/FlowSensitive/Models/UncheckedStatusOrAccessModel.cpp
+++ /dev/null
@@ -1,295 +0,0 @@
-//===- UncheckedStatusOrAccessModel.cpp -----------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/Analysis/FlowSensitive/Models/UncheckedStatusOrAccessModel.h"
-
-#include <cassert>
-#include <utility>
-
-#include "clang/AST/DeclCXX.h"
-#include "clang/AST/DeclTemplate.h"
-#include "clang/AST/Expr.h"
-#include "clang/AST/ExprCXX.h"
-#include "clang/AST/TypeBase.h"
-#include "clang/ASTMatchers/ASTMatchFinder.h"
-#include "clang/ASTMatchers/ASTMatchers.h"
-#include "clang/ASTMatchers/ASTMatchersInternal.h"
-#include "clang/Analysis/CFG.h"
-#include "clang/Analysis/FlowSensitive/CFGMatchSwitch.h"
-#include "clang/Analysis/FlowSensitive/DataflowAnalysis.h"
-#include "clang/Analysis/FlowSensitive/DataflowEnvironment.h"
-#include "clang/Analysis/FlowSensitive/MatchSwitch.h"
-#include "clang/Analysis/FlowSensitive/StorageLocation.h"
-#include "clang/Analysis/FlowSensitive/Value.h"
-#include "clang/Basic/LLVM.h"
-#include "clang/Basic/SourceLocation.h"
-#include "llvm/ADT/StringMap.h"
-
-namespace clang::dataflow::statusor_model {
-namespace {
-
-using ::clang::ast_matchers::MatchFinder;
-using ::clang::ast_matchers::StatementMatcher;
-
-} // namespace
-
-static bool namespaceEquals(const NamespaceDecl *NS,
- clang::ArrayRef<clang::StringRef> NamespaceNames) {
- while (!NamespaceNames.empty() && NS) {
- if (NS->getName() != NamespaceNames.consume_back())
- return false;
- NS = dyn_cast_or_null<NamespaceDecl>(NS->getParent());
- }
- return NamespaceNames.empty() && !NS;
-}
-
-// TODO: move this to a proper place to share with the rest of clang
-static bool isTypeNamed(QualType Type, clang::ArrayRef<clang::StringRef> NS,
- StringRef Name) {
- if (Type.isNull())
- return false;
- if (auto *RD = Type->getAsRecordDecl())
- if (RD->getName() == Name)
- if (const auto *N = dyn_cast_or_null<NamespaceDecl>(RD->getDeclContext()))
- return namespaceEquals(N, NS);
- return false;
-}
-
-static bool isStatusOrOperatorBaseType(QualType Type) {
- return isTypeNamed(Type, {"absl", "internal_statusor"}, "OperatorBase");
-}
-
-static bool isSafeUnwrap(RecordStorageLocation *StatusOrLoc,
- const Environment &Env) {
- if (!StatusOrLoc)
- return false;
- auto &StatusLoc = locForStatus(*StatusOrLoc);
- auto *OkVal = Env.get<BoolValue>(locForOk(StatusLoc));
- return OkVal != nullptr && Env.proves(OkVal->formula());
-}
-
-static ClassTemplateSpecializationDecl *
-getStatusOrBaseClass(const QualType &Ty) {
- auto *RD = Ty->getAsCXXRecordDecl();
- if (RD == nullptr)
- return nullptr;
- if (isStatusOrType(Ty) ||
- // In case we are analyzing code under OperatorBase itself that uses
- // operator* (e.g. to implement operator->).
- isStatusOrOperatorBaseType(Ty))
- return cast<ClassTemplateSpecializationDecl>(RD);
- if (!RD->hasDefinition())
- return nullptr;
- for (const auto &Base : RD->bases())
- if (auto *QT = getStatusOrBaseClass(Base.getType()))
- return QT;
- return nullptr;
-}
-
-static QualType getStatusOrValueType(ClassTemplateSpecializationDecl *TRD) {
- return TRD->getTemplateArgs().get(0).getAsType();
-}
-
-static auto isStatusOrMemberCallWithName(llvm::StringRef member_name) {
- using namespace ::clang::ast_matchers; // NOLINT: Too many names
- return cxxMemberCallExpr(
- on(expr(unless(cxxThisExpr()))),
- callee(cxxMethodDecl(
- hasName(member_name),
- ofClass(anyOf(statusOrClass(), statusOrOperatorBaseClass())))));
-}
-
-static auto isStatusOrOperatorCallWithName(llvm::StringRef operator_name) {
- using namespace ::clang::ast_matchers; // NOLINT: Too many names
- return cxxOperatorCallExpr(
- hasOverloadedOperatorName(operator_name),
- callee(cxxMethodDecl(
- ofClass(anyOf(statusOrClass(), statusOrOperatorBaseClass())))));
-}
-
-static auto valueCall() {
- using namespace ::clang::ast_matchers; // NOLINT: Too many names
- return anyOf(isStatusOrMemberCallWithName("value"),
- isStatusOrMemberCallWithName("ValueOrDie"));
-}
-
-static auto valueOperatorCall() {
- using namespace ::clang::ast_matchers; // NOLINT: Too many names
- return expr(anyOf(isStatusOrOperatorCallWithName("*"),
- isStatusOrOperatorCallWithName("->")));
-}
-
-static auto
-buildDiagnoseMatchSwitch(const UncheckedStatusOrAccessModelOptions &Options) {
- return CFGMatchSwitchBuilder<const Environment,
- llvm::SmallVector<SourceLocation>>()
- // StatusOr::value, StatusOr::ValueOrDie
- .CaseOfCFGStmt<CXXMemberCallExpr>(
- valueCall(),
- [](const CXXMemberCallExpr *E,
- const ast_matchers::MatchFinder::MatchResult &,
- const Environment &Env) {
- if (!isSafeUnwrap(getImplicitObjectLocation(*E, Env), Env))
- return llvm::SmallVector<SourceLocation>({E->getExprLoc()});
- return llvm::SmallVector<SourceLocation>();
- })
-
- // StatusOr::operator*, StatusOr::operator->
- .CaseOfCFGStmt<CXXOperatorCallExpr>(
- valueOperatorCall(),
- [](const CXXOperatorCallExpr *E,
- const ast_matchers::MatchFinder::MatchResult &,
- const Environment &Env) {
- RecordStorageLocation *StatusOrLoc =
- Env.get<RecordStorageLocation>(*E->getArg(0));
- if (!isSafeUnwrap(StatusOrLoc, Env))
- return llvm::SmallVector<SourceLocation>({E->getOperatorLoc()});
- return llvm::SmallVector<SourceLocation>();
- })
- .Build();
-}
-
-UncheckedStatusOrAccessDiagnoser::UncheckedStatusOrAccessDiagnoser(
- UncheckedStatusOrAccessModelOptions Options)
- : DiagnoseMatchSwitch(buildDiagnoseMatchSwitch(Options)) {}
-
-llvm::SmallVector<SourceLocation> UncheckedStatusOrAccessDiagnoser::operator()(
- const CFGElement &Elt, ASTContext &Ctx,
- const TransferStateForDiagnostics<UncheckedStatusOrAccessModel::Lattice>
- &State) {
- return DiagnoseMatchSwitch(Elt, Ctx, State.Env);
-}
-
-BoolValue &initializeStatus(RecordStorageLocation &StatusLoc,
- Environment &Env) {
- auto &OkVal = Env.makeAtomicBoolValue();
- Env.setValue(locForOk(StatusLoc), OkVal);
- return OkVal;
-}
-
-BoolValue &initializeStatusOr(RecordStorageLocation &StatusOrLoc,
- Environment &Env) {
- return initializeStatus(locForStatus(StatusOrLoc), Env);
-}
-
-clang::ast_matchers::DeclarationMatcher statusOrClass() {
- using namespace ::clang::ast_matchers; // NOLINT: Too many names
- return classTemplateSpecializationDecl(
- hasName("absl::StatusOr"),
- hasTemplateArgument(0, refersToType(type().bind("T"))));
-}
-
-clang::ast_matchers::DeclarationMatcher statusClass() {
- using namespace ::clang::ast_matchers; // NOLINT: Too many names
- return cxxRecordDecl(hasName("absl::Status"));
-}
-
-clang::ast_matchers::DeclarationMatcher statusOrOperatorBaseClass() {
- using namespace ::clang::ast_matchers; // NOLINT: Too many names
- return classTemplateSpecializationDecl(
- hasName("absl::internal_statusor::OperatorBase"));
-}
-
-clang::ast_matchers::TypeMatcher statusOrType() {
- using namespace ::clang::ast_matchers; // NOLINT: Too many names
- return hasCanonicalType(qualType(hasDeclaration(statusOrClass())));
-}
-
-bool isRecordTypeWithName(QualType Type, llvm::StringRef TypeName) {
- return Type->isRecordType() &&
- Type->getAsCXXRecordDecl()->getQualifiedNameAsString() == TypeName;
-}
-
-bool isStatusOrType(QualType Type) {
- return isTypeNamed(Type, {"absl"}, "StatusOr");
-}
-
-bool isStatusType(QualType Type) {
- return isTypeNamed(Type, {"absl"}, "Status");
-}
-
-llvm::StringMap<QualType> getSyntheticFields(QualType Ty, QualType StatusType,
- const CXXRecordDecl &RD) {
- if (auto *TRD = getStatusOrBaseClass(Ty))
- return {{"status", StatusType}, {"value", getStatusOrValueType(TRD)}};
- if (isStatusType(Ty) || (RD.hasDefinition() &&
- RD.isDerivedFrom(StatusType->getAsCXXRecordDecl())))
- return {{"ok", RD.getASTContext().BoolTy}};
- return {};
-}
-
-RecordStorageLocation &locForStatus(RecordStorageLocation &StatusOrLoc) {
- return cast<RecordStorageLocation>(StatusOrLoc.getSyntheticField("status"));
-}
-
-StorageLocation &locForOk(RecordStorageLocation &StatusLoc) {
- return StatusLoc.getSyntheticField("ok");
-}
-
-BoolValue &valForOk(RecordStorageLocation &StatusLoc, Environment &Env) {
- if (auto *Val = Env.get<BoolValue>(locForOk(StatusLoc)))
- return *Val;
- return initializeStatus(StatusLoc, Env);
-}
-
-static void transferStatusOrOkCall(const CXXMemberCallExpr *Expr,
- const MatchFinder::MatchResult &,
- LatticeTransferState &State) {
- RecordStorageLocation *StatusOrLoc =
- getImplicitObjectLocation(*Expr, State.Env);
- if (StatusOrLoc == nullptr)
- return;
-
- auto &OkVal = valForOk(locForStatus(*StatusOrLoc), State.Env);
- State.Env.setValue(*Expr, OkVal);
-}
-
-CFGMatchSwitch<LatticeTransferState>
-buildTransferMatchSwitch(ASTContext &Ctx,
- CFGMatchSwitchBuilder<LatticeTransferState> Builder) {
- using namespace ::clang::ast_matchers; // NOLINT: Too many names
- return std::move(Builder)
- .CaseOfCFGStmt<CXXMemberCallExpr>(isStatusOrMemberCallWithName("ok"),
- transferStatusOrOkCall)
- .Build();
-}
-
-QualType findStatusType(const ASTContext &Ctx) {
- for (Type *Ty : Ctx.getTypes())
- if (isStatusType(QualType(Ty, 0)))
- return QualType(Ty, 0);
-
- return QualType();
-}
-
-UncheckedStatusOrAccessModel::UncheckedStatusOrAccessModel(ASTContext &Ctx,
- Environment &Env)
- : DataflowAnalysis<UncheckedStatusOrAccessModel,
- UncheckedStatusOrAccessModel::Lattice>(Ctx),
- TransferMatchSwitch(buildTransferMatchSwitch(Ctx, {})) {
- QualType StatusType = findStatusType(Ctx);
- Env.getDataflowAnalysisContext().setSyntheticFieldCallback(
- [StatusType](QualType Ty) -> llvm::StringMap<QualType> {
- CXXRecordDecl *RD = Ty->getAsCXXRecordDecl();
- if (RD == nullptr)
- return {};
-
- if (auto Fields = getSyntheticFields(Ty, StatusType, *RD);
- !Fields.empty())
- return Fields;
- return {};
- });
-}
-
-void UncheckedStatusOrAccessModel::transfer(const CFGElement &Elt, Lattice &L,
- Environment &Env) {
- LatticeTransferState State(L, Env);
- TransferMatchSwitch(Elt, getASTContext(), State);
-}
-
-} // namespace clang::dataflow::statusor_model
diff --git a/clang/unittests/Analysis/FlowSensitive/CMakeLists.txt b/clang/unittests/Analysis/FlowSensitive/CMakeLists.txt
index 1d932ec6e8a96..35082387b46e9 100644
--- a/clang/unittests/Analysis/FlowSensitive/CMakeLists.txt
+++ b/clang/unittests/Analysis/FlowSensitive/CMakeLists.txt
@@ -25,8 +25,6 @@ add_clang_unittest(ClangAnalysisFlowSensitiveTests
TransferTest.cpp
TypeErasedDataflowAnalysisTest.cpp
UncheckedOptionalAccessModelTest.cpp
- UncheckedStatusOrAccessModelTest.cpp
- UncheckedStatusOrAccessModelTestFixture.cpp
ValueTest.cpp
WatchedLiteralsSolverTest.cpp
CLANG_LIBS
diff --git a/clang/unittests/Analysis/FlowSensitive/UncheckedStatusOrAccessModelTest.cpp b/clang/unittests/Analysis/FlowSensitive/UncheckedStatusOrAccessModelTest.cpp
deleted file mode 100644
index 07d3f2412e842..0000000000000
--- a/clang/unittests/Analysis/FlowSensitive/UncheckedStatusOrAccessModelTest.cpp
+++ /dev/null
@@ -1,34 +0,0 @@
-//===- UncheckedStatusOrAccessModelTest.cpp -------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include <utility>
-
-#include "UncheckedStatusOrAccessModelTestFixture.h"
-#include "clang/Analysis/FlowSensitive/Models/UncheckedStatusOrAccessModel.h"
-#include "gtest/gtest.h"
-
-namespace clang::dataflow::statusor_model {
-namespace {
-
-INSTANTIATE_TEST_SUITE_P(
- UncheckedStatusOrAccessModelTest, UncheckedStatusOrAccessModelTest,
- testing::Values(
- std::make_pair(new UncheckedStatusOrAccessModelTestExecutor<
- UncheckedStatusOrAccessModel>(),
- UncheckedStatusOrAccessModelTestAliasKind::kUnaliased),
- std::make_pair(
- new UncheckedStatusOrAccessModelTestExecutor<
- UncheckedStatusOrAccessModel>(),
- UncheckedStatusOrAccessModelTestAliasKind::kPartiallyAliased),
- std::make_pair(
- new UncheckedStatusOrAccessModelTestExecutor<
- UncheckedStatusOrAccessModel>(),
- UncheckedStatusOrAccessModelTestAliasKind::kFullyAliased)));
-} // namespace
-
-} // namespace clang::dataflow::statusor_model
diff --git a/clang/unittests/Analysis/FlowSensitive/UncheckedStatusOrAccessModelTestFixture.cpp b/clang/unittests/Analysis/FlowSensitive/UncheckedStatusOrAccessModelTestFixture.cpp
deleted file mode 100644
index 4827cc1d0a7e9..0000000000000
--- a/clang/unittests/Analysis/FlowSensitive/UncheckedStatusOrAccessModelTestFixture.cpp
+++ /dev/null
@@ -1,2518 +0,0 @@
-//===- UncheckedStatusOrAccessModelTestFixture.cpp ------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "UncheckedStatusOrAccessModelTestFixture.h"
-#include "MockHeaders.h"
-#include "llvm/Support/ErrorHandling.h"
-
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "gtest/gtest.h"
-
-namespace clang::dataflow::statusor_model {
-namespace {
-
-TE...
[truncated]
|
fmayer
deleted the
revert-162932-users/fmayer/spr/flowsensitive-statusor-1n-add-minimal-model
branch
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LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/166/builds/3107 Here is the relevant piece of the build log for the reference |
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Reverts #162932