<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Issue</th>
<td>
<a href=https://github.com/llvm/llvm-project/issues/70601>70601</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>
Lambda with concept-constrained type parameter in unevaluated context causes crash
</td>
</tr>
<tr>
<th>Labels</th>
<td>
new issue
</td>
</tr>
<tr>
<th>Assignees</th>
<td>
</td>
</tr>
<tr>
<th>Reporter</th>
<td>
JankoDedic
</td>
</tr>
</table>
<pre>
Clang 17.0.1 crashes while compiling this example:
```cpp
template <class>
concept C = true;
template <class>
using U = decltype([]<C> {}.template operator()<int>());
U<int> foo();
```
Godbolt link: https://godbolt.org/z/eeYo8e96h
Full error:
```
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: /opt/compiler-explorer/clang-17.0.1/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -S --gcc-toolchain=/opt/compiler-explorer/gcc-13.2.0 -fcolor-diagnostics -fno-crash-diagnostics -std=c++20 <source>
1. <source>:7:1: at annotation token
#0 0x0000000003349f18 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x3349f18)
#1 0x0000000003348044 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x3348044)
#2 0x000000000329c028 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x00007efe487b9420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420)
#4 0x00000000069846c8 clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::IntExprEvaluator, bool>::Visit(clang::Stmt const*) ExprConstant.cpp:0:0
#5 0x000000000696756e Evaluate(clang::APValue&, (anonymous namespace)::EvalInfo&, clang::Expr const*) ExprConstant.cpp:0:0
#6 0x000000000698bfb2 EvaluateInPlace(clang::APValue&, (anonymous namespace)::EvalInfo&, (anonymous namespace)::LValue const&, clang::Expr const*, bool) (.constprop.0) ExprConstant.cpp:0:0
#7 0x0000000006997db3 clang::Expr::EvaluateAsConstantExpr(clang::Expr::EvalResult&, clang::ASTContext const&, clang::Expr::ConstantExprKind) const (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x6997db3)
#8 0x0000000005b79d97 clang::ActionResult<clang::Expr*, true> calculateConstraintSatisfaction<calculateConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, clang::ConstraintSatisfaction&)::'lambda'(clang::Expr const*)>(clang::Sema&, clang::Expr const*, clang::ConstraintSatisfaction&, calculateConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, clang::ConstraintSatisfaction&)::'lambda'(clang::Expr const*)&&) SemaConcept.cpp:0:0
#9 0x0000000005b7a5c8 CheckConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, llvm::ArrayRef<clang::Expr const*>, llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, clang::ConstraintSatisfaction&) SemaConcept.cpp:0:0
#10 0x0000000005b7ab68 clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, llvm::ArrayRef<clang::Expr const*>, llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, clang::ConstraintSatisfaction&) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x5b7ab68)
#11 0x0000000005b7b7b1 clang::Sema::CheckInstantiatedFunctionTemplateConstraints(clang::SourceLocation, clang::FunctionDecl*, llvm::ArrayRef<clang::TemplateArgument>, clang::ConstraintSatisfaction&) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x5b7b7b1)
#12 0x000000000636b822 clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, llvm::SmallVectorImpl<clang::Sema::OriginalCallArg> const*, bool, llvm::function_ref<bool ()>) (.constprop.0) SemaTemplateDeduction.cpp:0:0
#13 0x000000000636bd9a void llvm::function_ref<void ()>::callback_fn<clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>)::'lambda1'()>(long) SemaTemplateDeduction.cpp:0:0
#14 0x0000000005a14cc1 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x5a14cc1)
#15 0x0000000006375854 clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x6375854)
#16 0x000000000619a283 clang::Sema::AddMethodTemplateCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::CXXRecordDecl*, clang::TemplateArgumentListInfo*, clang::QualType, clang::Expr::Classification, llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool, clang::OverloadCandidateParamOrder) (.constprop.0) SemaOverload.cpp:0:0
#17 0x00000000061ad3cb clang::Sema::BuildCallToMemberFunction(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, bool) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x61ad3cb)
#18 0x0000000005e69603 clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, bool) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x5e69603)
#19 0x0000000005e6f73c clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x5e6f73c)
#20 0x00000000063b2b6b clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCallExpr(clang::CallExpr*) SemaTemplateInstantiate.cpp:0:0
#21 0x00000000063a9f86 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#22 0x00000000063b5bef clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformType(clang::TypeLocBuilder&, clang::TypeLoc) SemaTemplateInstantiate.cpp:0:0
#23 0x00000000063b93eb clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformType(clang::TypeSourceInfo*) SemaTemplateInstantiate.cpp:0:0
#24 0x00000000063ba99e clang::Sema::SubstType(clang::QualType, clang::MultiLevelTemplateArgumentList const&, clang::SourceLocation, clang::DeclarationName) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x63ba99e)
#25 0x0000000006281522 clang::Sema::CheckTemplateIdType(clang::TemplateName, clang::SourceLocation, clang::TemplateArgumentListInfo&) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x6281522)
#26 0x0000000006284787 clang::Sema::ActOnTemplateIdType(clang::Scope*, clang::CXXScopeSpec&, clang::SourceLocation, clang::OpaquePtr<clang::TemplateName>, clang::IdentifierInfo*, clang::SourceLocation, clang::SourceLocation, llvm::MutableArrayRef<clang::ParsedTemplateArgument>, clang::SourceLocation, bool, bool, clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x6284787)
#27 0x00000000059c0807 clang::Parser::AnnotateTemplateIdTokenAsType(clang::CXXScopeSpec&, clang::ImplicitTypenameContext, bool) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x59c0807)
#28 0x00000000058f1c63 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&, clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x58f1c63)
#29 0x00000000058c519d clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x58c519d)
#30 0x00000000058c632f clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (.part.0) Parser.cpp:0:0
#31 0x00000000058cda8f clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x58cda8f)
#32 0x00000000058cef0a clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x58cef0a)
#33 0x00000000058be95a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x58be95a)
#34 0x00000000044f8b05 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x44f8b05)
#35 0x0000000003dd5f21 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x3dd5f21)
#36 0x0000000003d5b9fb clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x3d5b9fb)
#37 0x0000000003eb5c23 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x3eb5c23)
#38 0x0000000000bd50c5 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0xbd50c5)
#39 0x0000000000bce42d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#40 0x0000000003ba7489 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#41 0x000000000329c453 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x329c453)
#42 0x0000000003ba76a9 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#43 0x0000000003b6f477 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x3b6f477)
#44 0x0000000003b6fe2d clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x3b6fe2d)
#45 0x0000000003b79d0c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0x3b79d0c)
#46 0x0000000000bd2d31 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0xbd2d31)
#47 0x0000000000acf511 main (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0xacf511)
#48 0x00007efe4825d083 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24083)
#49 0x0000000000bcdc2e _start (/opt/compiler-explorer/clang-17.0.1/bin/clang+++0xbcdc2e)
clang++: error: clang frontend command failed with exit code 139 (use -v to see invocation)
Compiler returned: 139
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsW9tz27h3_mvoF4w0JEjx8uAHWba3Tp2NG3m36ZMGBEAJNQmwAOjY_es7IKgLKFK2s0pmOvntbBKbuH3fdw4ODkAQKcXWnNJLb3blza4vUKM3Ql5-QvxJXFPC8EUuyOvlokR8DYJk6k8DgCVSG6rA9w0rKcCiqlnJ-BroDVOAvqCqLqkXzj3_2vPnXuzb_3Fd2yeaVnWJNAVeuMAlUsoLb2wJFhzTWoMF8MJroGVDvfCq6-aNpo0yCP5qGxKKS_1aUw-mlpUXLhZeeAO85MpLrqe7XkRNJdJCmoow88IF49r0aH81T5zR_9rVAIUQ20ZXPZ6HLf4QJBelBiXjT144Bxuta2WkgbcevF3b0qmQaw_e_q8Hbyn9L5HSLN4cdnLblCWgUgp5LKr99eH-Zr68AarJK6YBAnmzBpLWQmqgRX9QpjdNPsWi8uBtWT5v_5nUUvw3xdqDt0yphioP3gLECWAclw2hQG-otTzIEX7SEmHqwQWoJa2lwFQpSoASjbSPTUuklMAMaUqAbDhQWLJaTy3kpUb4CZCmqnek_KnnZw9SrCWqAJLrpqJcG-DAg7eiNsisr1E5oS91KSSV5plxzYl1TQ_e5oxvH3rwyoNXYLIm35EsJhGYrMFEmN5QXZs-G103eqrApDIKgMnkJY0nSFUT9co1evHCa8Y1LcFkCSaTNcYTLUSJN4hxL7w-CcpUDsIpnPpgUmBRCjkhDK25UJphBSYFF5NWTPex0sQLr7EFDn3j5p2kWz8PjEjO43CeeOE8MDohDRDnQiPNBAdaPFFuWwEPhj7wX_ztf2EYZUWQgtYBwrkXztWrsj88SMZ1a55Ha-N0X0mi7yuhtKSo8mBs7GzmA8xAOxn-gZE8eOW_dKDMrNqhDnqoUz-KhlAvSop4U3_hS7bmqPRg2vA2shFQCjPK-TAaCA5G6GCEGfZhChbGul8pFs9UvlpQ_4Y4Kc1QaaeaU2chuKYvemriZDj32z-7IcJuiIQWNEqTPIugD1YrSZUWkq6k7tiVLPfg7Usar-JoUjLevEzWvLEFtd5IishUianfcgmiCPoOk-iQSZylUYxTYCVoVV7qSv_NFNNCXiFFvXCxN0WFnugKC670qtbS-IYHU8QFf61EowBHFVV161CZbXDH9c1LLW-eUdnYKLwAuRCldWovnLcjeTDtAQDtIB6cGwlNDwvzO-Ij0s1cTnEyiynoBqVu7_OHv1HZ0M6134BvurjjhehqH3RjMH0QZNwTPi9yuAN5xx9KOxPPhPWN2vdtz1sGb7DrbGbn17R9XktRGxd7D_HEJZ4lJA_7o-05GDXmattjW-aI4tb-SlVTDjCYLx-7yXaKYxdXDsb6d8aJYdU2Ok846Rg7kzA9lGSWJxnJEgc-NuG9I9fmQQ5saxSbPN0AjErcmGSnJSKRie1IM1WgthfT_o0a7vyjFTqW609UUXJNcen4xWGzdrW6FxjZLp3Cz02p2T19puVjl5jNu8X_nqmTJhobboxJvHNxDyYlqnKCPJgcu9Dh5LX54JsS_CCcxZsG-t3lN61MQ2C4L-wGYTiUZL15g2Y4BYsNxU_nlna_6M2lRK9faXE8D_cNjAMdtllWqCz_plgLeVfV5fAUNo36YH7MUtb4XxFf0w_Y6bTcJjHz-3LnsZsrGEHtOO-1we-r9lkWk84Iu8XEWCnoWSlP8uCEle7satdu2m4b3kLc0t8TUL2pcyq8bHsxZn2nQft6dzb91VoaqRwtnTw_DuM8hXBYy1vGmdr0eVxT0gx4fV_nQaVOunHbMSWDurUOutsLtRuP0_bpe7TasdoD7HgcpJTvRLqX6Itka8ZRuUBlOZfrNlc5SioP-y06oCvZ-oupALZnMDcj-acZ7gj1cDgL-8YlGQLPgpFxCG3pHkJbBaOyzBF-WhV8jLm1Vt9Y6t1OcWKmmMhkjfLuyLmPmed3iq0R323MtwD_R4PKx9eaWotv_3YyisCmFLvMbbv7_4ArOLvgGQoijEdipmz4fzK9WTZFwTCj3bnJsj7arR2HyPd61dkCmuXhBDR3axwms3QWDRP9l8-e1WfPtHm0FnNM6h4kBBmCaThs0jkhn6neiN2ysUCcMHJ0KPI-q5qnc4ypUg-Iyf5y_e3bV4qFJD_kEUNajm7XS6QUK9jQPPugP315prIUiOxkWVI94iOnWj0giaovkhizjq5R21bD8cg9IwkQCXE-bNOrhpXErKiP4jOtciq3xutFIyyMhn11D44P3hm6Pjca5SX9oLIn88UDEK7M55o0Vj9n0rgnLjTOYn9k0uwEPj57-p1F7TRzRM16ohZJiEciEdZf-P9jUc8notHoUETouyt0DvPYmfqPktJHibgqhKy8cPHGye420u63eULuUtddP8Om2D-d9_Opg13jYASDgUsDZUUa_3QaI8fDPwC_t_HLZzktfjp8u84dwjdP7gVuY5Bxq36C05V_mF5v65NnIf35TjZMz0643eL_QSJRjwjKMjoccpZNrvQxhJH84p8cBY0ED5MJIdmW_IkqesacsGXtBBE3zYdpMBs7t2jPgHZykwEbdWUW8_vpjqd45zuy6Zg51OMe9ShJkxOL0CnqI0vR4tu3tmRZU_xBH_hSo_9p6IOWw8dfrcZHS9IdoVyzglE5nCKfHPGHV8gHJNXIAdMbA5zIle-qumSYtfPQhJHupdw5HcLY23EIJ5eeZdhPfcchWqLdZmJu71LQA68QT5TP1bFznPaCUaLnTsMsH4ewm9umRYDjcIxw-_NBZDJsWlfrbfRNlWGmR72RffAuxFiktBvH3Wgn-tyOfKDgSM17u_dSlMy1libeHM-Vn-2AndyOPdy0OMWzICNv2uOL3J9uFHdcU2nvuBzNUMOV5Y2masQ2b9ZgfD1u3iNDnU2oVodDodz7SrMUxyEs3uu4jl6Ms-Mt8E-Rq-9fw3JNayS13ftbDoPJjHvzaZZigtLT_G9erF8c6PBrOJ_PCQxHxwlgTwRa-OikCI-ibhM1e9KUvr3amop_SNHU7Zo38B5wnyJ8FqQp6V1VC6mXuj0oO-MLJ0vOYR-67HOazY7Zz5ePo2-yf85m3wJxkDqZdxQVae7P3Bd2hP5B-by7dGI3YxQ3ms6351Nnw9cN7-BzUuCQkFkBnSP9W2lCPycDAM8JrRvZgRa70GZ5VuSudHYwu_vBdFi9cS5n9NEOnQPfSahCms8w7F3gaoHuWTzvksP0FMszBpYOlQPbSYv8nMx8PAMYB6sKmT5GTvU36OimgfsMLtp3hudEb7E54DMXPKYRJGAr9CJ4bGd7evKV7BGT3ltc08fxJbkMEMmeR1asyL1hnKMkSrNzvkK1Y3f-sggWoqoQJ_3JOmi59mK1eSZqMzoqnaurSy0ZX3cLgDXrrsFqhV9egsD-kiPF8Eq11TsVncrmwUpLxLTaFve6Q2Vp_F_Ig3JT5eBsdr67Y2ib9C5LHb3Z_CTyYXsE_XvJ0Sw8MMXQ7WNb8rXhS1TQ8tWR89e8p-xwHvp7BPuOFaMM_M6O0UsjRz0gdIWLiyhJRoVrLYaO1r-tmk647jU0FcY2dyeqzp005awXazuyjhtFfTUoJB9V45PI1bgUn0R-dCJ4KgzvrF8jJruviz6gXuciP1NDCp1dWeQmUnmSER-P4b0--NlJAwbW_zHtf6GG5wpgVhRHtbiXbUASdunnNt_Yom4Dx_zoLsTYcnymDMPgcQA7WZ2PcDELAmCgnmdE26EzYup84QJnxE9DsFqVLDdxFUm9Ohj-1GcueKrENG6HgZGfuitJP3MiGFJg-z-Tlm2XuzEPi8P57is-a3tQdJk6wJ1XFoiVlIDvTG8AfWHG1oSCIGwN3SgKJs9AC6AoBewgke4G2-bQQFLdSE7NvDCNe98MXpDLkGRhhi7oZRBnaewnsZ9cbC7zOMaIkKxIZjMYpglBeRSQgmRJnheI5BfsEvowDHyYBRmMo2Qa5RksZjBJEKEFCbEX-bRCrJwaz50Kub5ovyW8TPzYDy5KlNNStV-aQsjpd9AWehB6s-sLedl-hZg3a-VFfsmUVvteNNMlvbxvsyCrTvep6ARvb4JSAvRrTUGNJKqophIwDhpOu69G2hlvpw9qFFX2U8aLRpaXP_59ZEvr_wIAAP___ekbTg">