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llvm-project/clang/unittests/Basic/VirtualFileSystemTest.cpp

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//===- unittests/Basic/VirtualFileSystem.cpp ---------------- VFS tests ---===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Basic/VirtualFileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
#include <map>
using namespace clang;
using namespace llvm;
using llvm::sys::fs::UniqueID;
namespace {
class DummyFileSystem : public vfs::FileSystem {
int FSID; // used to produce UniqueIDs
int FileID; // used to produce UniqueIDs
std::map<std::string, vfs::Status> FilesAndDirs;
static int getNextFSID() {
static int Count = 0;
return Count++;
}
public:
DummyFileSystem() : FSID(getNextFSID()), FileID(0) {}
ErrorOr<vfs::Status> status(const Twine &Path) {
std::map<std::string, vfs::Status>::iterator I =
FilesAndDirs.find(Path.str());
if (I == FilesAndDirs.end())
return make_error_code(errc::no_such_file_or_directory);
return I->second;
}
error_code openFileForRead(const Twine &Path,
std::unique_ptr<vfs::File> &Result) {
llvm_unreachable("unimplemented");
}
error_code getBufferForFile(const Twine &Name,
std::unique_ptr<MemoryBuffer> &Result,
int64_t FileSize = -1,
bool RequiresNullTerminator = true) {
llvm_unreachable("unimplemented");
}
void addEntry(StringRef Path, const vfs::Status &Status) {
FilesAndDirs[Path] = Status;
}
void addRegularFile(StringRef Path, sys::fs::perms Perms = sys::fs::all_all) {
vfs::Status S(Path, Path, UniqueID(FSID, FileID++), sys::TimeValue::now(),
0, 0, 1024, sys::fs::file_type::regular_file, Perms);
addEntry(Path, S);
}
void addDirectory(StringRef Path, sys::fs::perms Perms = sys::fs::all_all) {
vfs::Status S(Path, Path, UniqueID(FSID, FileID++), sys::TimeValue::now(),
0, 0, 0, sys::fs::file_type::directory_file, Perms);
addEntry(Path, S);
}
void addSymlink(StringRef Path) {
vfs::Status S(Path, Path, UniqueID(FSID, FileID++), sys::TimeValue::now(),
0, 0, 0, sys::fs::file_type::symlink_file, sys::fs::all_all);
addEntry(Path, S);
}
};
} // end anonymous namespace
TEST(VirtualFileSystemTest, StatusQueries) {
IntrusiveRefCntPtr<DummyFileSystem> D(new DummyFileSystem());
ErrorOr<vfs::Status> Status((error_code()));
D->addRegularFile("/foo");
Status = D->status("/foo");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->isStatusKnown());
EXPECT_FALSE(Status->isDirectory());
EXPECT_TRUE(Status->isRegularFile());
EXPECT_FALSE(Status->isSymlink());
EXPECT_FALSE(Status->isOther());
EXPECT_TRUE(Status->exists());
D->addDirectory("/bar");
Status = D->status("/bar");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->isStatusKnown());
EXPECT_TRUE(Status->isDirectory());
EXPECT_FALSE(Status->isRegularFile());
EXPECT_FALSE(Status->isSymlink());
EXPECT_FALSE(Status->isOther());
EXPECT_TRUE(Status->exists());
D->addSymlink("/baz");
Status = D->status("/baz");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->isStatusKnown());
EXPECT_FALSE(Status->isDirectory());
EXPECT_FALSE(Status->isRegularFile());
EXPECT_TRUE(Status->isSymlink());
EXPECT_FALSE(Status->isOther());
EXPECT_TRUE(Status->exists());
EXPECT_TRUE(Status->equivalent(*Status));
ErrorOr<vfs::Status> Status2 = D->status("/foo");
ASSERT_FALSE(Status2.getError());
EXPECT_FALSE(Status->equivalent(*Status2));
}
TEST(VirtualFileSystemTest, BaseOnlyOverlay) {
IntrusiveRefCntPtr<DummyFileSystem> D(new DummyFileSystem());
ErrorOr<vfs::Status> Status((error_code()));
EXPECT_FALSE(Status = D->status("/foo"));
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(new vfs::OverlayFileSystem(D));
EXPECT_FALSE(Status = O->status("/foo"));
D->addRegularFile("/foo");
Status = D->status("/foo");
EXPECT_FALSE(Status.getError());
ErrorOr<vfs::Status> Status2((error_code()));
Status2 = O->status("/foo");
EXPECT_FALSE(Status2.getError());
EXPECT_TRUE(Status->equivalent(*Status2));
}
TEST(VirtualFileSystemTest, OverlayFiles) {
IntrusiveRefCntPtr<DummyFileSystem> Base(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Middle(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Top(new DummyFileSystem());
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Base));
O->pushOverlay(Middle);
O->pushOverlay(Top);
ErrorOr<vfs::Status> Status1((error_code())), Status2((error_code())),
Status3((error_code())), StatusB((error_code())), StatusM((error_code())),
StatusT((error_code()));
Base->addRegularFile("/foo");
StatusB = Base->status("/foo");
ASSERT_FALSE(StatusB.getError());
Status1 = O->status("/foo");
ASSERT_FALSE(Status1.getError());
Middle->addRegularFile("/foo");
StatusM = Middle->status("/foo");
ASSERT_FALSE(StatusM.getError());
Status2 = O->status("/foo");
ASSERT_FALSE(Status2.getError());
Top->addRegularFile("/foo");
StatusT = Top->status("/foo");
ASSERT_FALSE(StatusT.getError());
Status3 = O->status("/foo");
ASSERT_FALSE(Status3.getError());
EXPECT_TRUE(Status1->equivalent(*StatusB));
EXPECT_TRUE(Status2->equivalent(*StatusM));
EXPECT_TRUE(Status3->equivalent(*StatusT));
EXPECT_FALSE(Status1->equivalent(*Status2));
EXPECT_FALSE(Status2->equivalent(*Status3));
EXPECT_FALSE(Status1->equivalent(*Status3));
}
TEST(VirtualFileSystemTest, OverlayDirsNonMerged) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(Upper);
Lower->addDirectory("/lower-only");
Upper->addDirectory("/upper-only");
// non-merged paths should be the same
ErrorOr<vfs::Status> Status1 = Lower->status("/lower-only");
ASSERT_FALSE(Status1.getError());
ErrorOr<vfs::Status> Status2 = O->status("/lower-only");
ASSERT_FALSE(Status2.getError());
EXPECT_TRUE(Status1->equivalent(*Status2));
Status1 = Upper->status("/upper-only");
ASSERT_FALSE(Status1.getError());
Status2 = O->status("/upper-only");
ASSERT_FALSE(Status2.getError());
EXPECT_TRUE(Status1->equivalent(*Status2));
}
TEST(VirtualFileSystemTest, MergedDirPermissions) {
// merged directories get the permissions of the upper dir
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(Upper);
ErrorOr<vfs::Status> Status((error_code()));
Lower->addDirectory("/both", sys::fs::owner_read);
Upper->addDirectory("/both", sys::fs::owner_all | sys::fs::group_read);
Status = O->status("/both");
ASSERT_FALSE(Status.getError());
EXPECT_EQ(0740, Status->getPermissions());
// permissions (as usual) are not recursively applied
Lower->addRegularFile("/both/foo", sys::fs::owner_read);
Upper->addRegularFile("/both/bar", sys::fs::owner_write);
Status = O->status("/both/foo");
ASSERT_FALSE( Status.getError());
EXPECT_EQ(0400, Status->getPermissions());
Status = O->status("/both/bar");
ASSERT_FALSE(Status.getError());
EXPECT_EQ(0200, Status->getPermissions());
}
// NOTE: in the tests below, we use '//root/' as our root directory, since it is
// a legal *absolute* path on Windows as well as *nix.
class VFSFromYAMLTest : public ::testing::Test {
public:
int NumDiagnostics;
void SetUp() {
NumDiagnostics = 0;
}
static void CountingDiagHandler(const SMDiagnostic &, void *Context) {
VFSFromYAMLTest *Test = static_cast<VFSFromYAMLTest *>(Context);
++Test->NumDiagnostics;
}
IntrusiveRefCntPtr<vfs::FileSystem>
getFromYAMLRawString(StringRef Content,
IntrusiveRefCntPtr<vfs::FileSystem> ExternalFS) {
MemoryBuffer *Buffer = MemoryBuffer::getMemBuffer(Content);
return getVFSFromYAML(Buffer, CountingDiagHandler, this, ExternalFS);
}
IntrusiveRefCntPtr<vfs::FileSystem> getFromYAMLString(
StringRef Content,
IntrusiveRefCntPtr<vfs::FileSystem> ExternalFS = new DummyFileSystem()) {
std::string VersionPlusContent("{\n 'version':0,\n");
VersionPlusContent += Content.slice(Content.find('{') + 1, StringRef::npos);
return getFromYAMLRawString(VersionPlusContent, ExternalFS);
}
};
TEST_F(VFSFromYAMLTest, BasicVFSFromYAML) {
IntrusiveRefCntPtr<vfs::FileSystem> FS;
FS = getFromYAMLString("");
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString("[]");
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString("'string'");
EXPECT_EQ(nullptr, FS.getPtr());
EXPECT_EQ(3, NumDiagnostics);
}
TEST_F(VFSFromYAMLTest, MappedFiles) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("//root/foo/bar/a");
IntrusiveRefCntPtr<vfs::FileSystem> FS =
getFromYAMLString("{ 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'file1',\n"
" 'external-contents': '//root/foo/bar/a'\n"
" },\n"
" {\n"
" 'type': 'file',\n"
" 'name': 'file2',\n"
" 'external-contents': '//root/foo/b'\n"
" }\n"
" ]\n"
"}\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.getPtr() != nullptr);
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(FS);
// file
ErrorOr<vfs::Status> S = O->status("//root/file1");
ASSERT_FALSE(S.getError());
EXPECT_EQ("//root/foo/bar/a", S->getName());
ErrorOr<vfs::Status> SLower = O->status("//root/foo/bar/a");
EXPECT_EQ("//root/foo/bar/a", SLower->getName());
EXPECT_TRUE(S->equivalent(*SLower));
// directory
S = O->status("//root/");
ASSERT_FALSE(S.getError());
EXPECT_TRUE(S->isDirectory());
EXPECT_TRUE(S->equivalent(*O->status("//root/"))); // non-volatile UniqueID
// broken mapping
EXPECT_EQ(errc::no_such_file_or_directory, O->status("//root/file2").getError());
EXPECT_EQ(0, NumDiagnostics);
}
TEST_F(VFSFromYAMLTest, CaseInsensitive) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("//root/foo/bar/a");
IntrusiveRefCntPtr<vfs::FileSystem> FS =
getFromYAMLString("{ 'case-sensitive': 'false',\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'XX',\n"
" 'external-contents': '//root/foo/bar/a'\n"
" }\n"
" ]\n"
"}]}",
Lower);
ASSERT_TRUE(FS.getPtr() != nullptr);
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(FS);
ErrorOr<vfs::Status> S = O->status("//root/XX");
ASSERT_FALSE(S.getError());
ErrorOr<vfs::Status> SS = O->status("//root/xx");
ASSERT_FALSE(SS.getError());
EXPECT_TRUE(S->equivalent(*SS));
SS = O->status("//root/xX");
EXPECT_TRUE(S->equivalent(*SS));
SS = O->status("//root/Xx");
EXPECT_TRUE(S->equivalent(*SS));
EXPECT_EQ(0, NumDiagnostics);
}
TEST_F(VFSFromYAMLTest, CaseSensitive) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("//root/foo/bar/a");
IntrusiveRefCntPtr<vfs::FileSystem> FS =
getFromYAMLString("{ 'case-sensitive': 'true',\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'XX',\n"
" 'external-contents': '//root/foo/bar/a'\n"
" }\n"
" ]\n"
"}]}",
Lower);
ASSERT_TRUE(FS.getPtr() != nullptr);
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(FS);
ErrorOr<vfs::Status> SS = O->status("//root/xx");
EXPECT_EQ(errc::no_such_file_or_directory, SS.getError());
SS = O->status("//root/xX");
EXPECT_EQ(errc::no_such_file_or_directory, SS.getError());
SS = O->status("//root/Xx");
EXPECT_EQ(errc::no_such_file_or_directory, SS.getError());
EXPECT_EQ(0, NumDiagnostics);
}
TEST_F(VFSFromYAMLTest, IllegalVFSFile) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
// invalid YAML at top-level
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString("{]", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
// invalid YAML in roots
FS = getFromYAMLString("{ 'roots':[}", Lower);
// invalid YAML in directory
FS = getFromYAMLString(
"{ 'roots':[ { 'name': 'foo', 'type': 'directory', 'contents': [}",
Lower);
EXPECT_EQ(nullptr, FS.getPtr());
// invalid configuration
FS = getFromYAMLString("{ 'knobular': 'true', 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString("{ 'case-sensitive': 'maybe', 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
// invalid roots
FS = getFromYAMLString("{ 'roots':'' }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString("{ 'roots':{} }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
// invalid entries
FS = getFromYAMLString(
"{ 'roots':[ { 'type': 'other', 'name': 'me', 'contents': '' }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString("{ 'roots':[ { 'type': 'file', 'name': [], "
"'external-contents': 'other' }",
Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString(
"{ 'roots':[ { 'type': 'file', 'name': 'me', 'external-contents': [] }",
Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString(
"{ 'roots':[ { 'type': 'file', 'name': 'me', 'external-contents': {} }",
Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString(
"{ 'roots':[ { 'type': 'directory', 'name': 'me', 'contents': {} }",
Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString(
"{ 'roots':[ { 'type': 'directory', 'name': 'me', 'contents': '' }",
Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString(
"{ 'roots':[ { 'thingy': 'directory', 'name': 'me', 'contents': [] }",
Lower);
EXPECT_EQ(nullptr, FS.getPtr());
// missing mandatory fields
FS = getFromYAMLString("{ 'roots':[ { 'type': 'file', 'name': 'me' }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString(
"{ 'roots':[ { 'type': 'file', 'external-contents': 'other' }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString("{ 'roots':[ { 'name': 'me', 'contents': [] }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
// duplicate keys
FS = getFromYAMLString("{ 'roots':[], 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLString(
"{ 'case-sensitive':'true', 'case-sensitive':'true', 'roots':[] }",
Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS =
getFromYAMLString("{ 'roots':[{'name':'me', 'name':'you', 'type':'file', "
"'external-contents':'blah' } ] }",
Lower);
EXPECT_EQ(nullptr, FS.getPtr());
// missing version
FS = getFromYAMLRawString("{ 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
// bad version number
FS = getFromYAMLRawString("{ 'version':'foo', 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLRawString("{ 'version':-1, 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
FS = getFromYAMLRawString("{ 'version':100000, 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.getPtr());
EXPECT_EQ(24, NumDiagnostics);
}
TEST_F(VFSFromYAMLTest, UseExternalName) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("//root/external/file");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'roots': [\n"
" { 'type': 'file', 'name': '//root/A',\n"
" 'external-contents': '//root/external/file'\n"
" },\n"
" { 'type': 'file', 'name': '//root/B',\n"
" 'use-external-name': true,\n"
" 'external-contents': '//root/external/file'\n"
" },\n"
" { 'type': 'file', 'name': '//root/C',\n"
" 'use-external-name': false,\n"
" 'external-contents': '//root/external/file'\n"
" }\n"
"] }", Lower);
ASSERT_TRUE(nullptr != FS.getPtr());
// default true
EXPECT_EQ("//root/external/file", FS->status("//root/A")->getName());
// explicit
EXPECT_EQ("//root/external/file", FS->status("//root/B")->getName());
EXPECT_EQ("//root/C", FS->status("//root/C")->getName());
// global configuration
FS = getFromYAMLString(
"{ 'use-external-names': false,\n"
" 'roots': [\n"
" { 'type': 'file', 'name': '//root/A',\n"
" 'external-contents': '//root/external/file'\n"
" },\n"
" { 'type': 'file', 'name': '//root/B',\n"
" 'use-external-name': true,\n"
" 'external-contents': '//root/external/file'\n"
" },\n"
" { 'type': 'file', 'name': '//root/C',\n"
" 'use-external-name': false,\n"
" 'external-contents': '//root/external/file'\n"
" }\n"
"] }", Lower);
ASSERT_TRUE(nullptr != FS.getPtr());
// default
EXPECT_EQ("//root/A", FS->status("//root/A")->getName());
// explicit
EXPECT_EQ("//root/external/file", FS->status("//root/B")->getName());
EXPECT_EQ("//root/C", FS->status("//root/C")->getName());
}
TEST_F(VFSFromYAMLTest, MultiComponentPath) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("//root/other");
// file in roots
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'roots': [\n"
" { 'type': 'file', 'name': '//root/path/to/file',\n"
" 'external-contents': '//root/other' }]\n"
"}", Lower);
ASSERT_TRUE(nullptr != FS.getPtr());
EXPECT_FALSE(FS->status("//root/path/to/file").getError());
EXPECT_FALSE(FS->status("//root/path/to").getError());
EXPECT_FALSE(FS->status("//root/path").getError());
EXPECT_FALSE(FS->status("//root/").getError());
// at the start
FS = getFromYAMLString(
"{ 'roots': [\n"
" { 'type': 'directory', 'name': '//root/path/to',\n"
" 'contents': [ { 'type': 'file', 'name': 'file',\n"
" 'external-contents': '//root/other' }]}]\n"
"}", Lower);
ASSERT_TRUE(nullptr != FS.getPtr());
EXPECT_FALSE(FS->status("//root/path/to/file").getError());
EXPECT_FALSE(FS->status("//root/path/to").getError());
EXPECT_FALSE(FS->status("//root/path").getError());
EXPECT_FALSE(FS->status("//root/").getError());
// at the end
FS = getFromYAMLString(
"{ 'roots': [\n"
" { 'type': 'directory', 'name': '//root/',\n"
" 'contents': [ { 'type': 'file', 'name': 'path/to/file',\n"
" 'external-contents': '//root/other' }]}]\n"
"}", Lower);
ASSERT_TRUE(nullptr != FS.getPtr());
EXPECT_FALSE(FS->status("//root/path/to/file").getError());
EXPECT_FALSE(FS->status("//root/path/to").getError());
EXPECT_FALSE(FS->status("//root/path").getError());
EXPECT_FALSE(FS->status("//root/").getError());
}
TEST_F(VFSFromYAMLTest, TrailingSlashes) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("//root/other");
// file in roots
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'roots': [\n"
" { 'type': 'directory', 'name': '//root/path/to////',\n"
" 'contents': [ { 'type': 'file', 'name': 'file',\n"
" 'external-contents': '//root/other' }]}]\n"
"}", Lower);
ASSERT_TRUE(nullptr != FS.getPtr());
EXPECT_FALSE(FS->status("//root/path/to/file").getError());
EXPECT_FALSE(FS->status("//root/path/to").getError());
EXPECT_FALSE(FS->status("//root/path").getError());
EXPECT_FALSE(FS->status("//root/").getError());
}
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