<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/140461>140461</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            ASTContext.cpp:2443: clang::TypeInfo clang::ASTContext::getTypeInfoImpl(const clang::Type*) const: Assertion `!A->getDeducedType().isNull() && "cannot request the size of an undeduced or dependent auto type"' failed. Since clang 11
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          mariete1223
      </td>
    </tr>
</table>

<pre>
    It happens when using auto on a undefined variable.

## Assertion

```
clang++: /root/llvm-project/llvm/tools/clang/lib/AST/ASTContext.cpp:2443: clang::TypeInfo clang::ASTContext::getTypeInfoImpl(const clang::Type*) const: Assertion `!A->getDeducedType().isNull() && "cannot request the size of an undeduced or dependent auto type"' failed.
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

```
Stack dump:
0.      Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -x c++ <source>
1.      <eof> parser at end of file
2.      <source>:3:5: LLVM IR generation of declaration 'main'
3.      <source>:3:5: Generating code for declaration 'main'
 #0 0x0000000003f9b2a8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f9b2a8)
 #1 0x0000000003f98f34 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f98f34)
 #2 0x0000000003eddb68 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007cb124442520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007cb1244969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x00007cb124442476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007cb1244287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x00007cb12442871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x00007cb124439e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x000000000757d42d clang::ASTContext::getTypeInfoImpl(clang::Type const*) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x757d42d)
#10 0x0000000007566437 clang::ASTContext::getTypeInfo(clang::Type const*) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7566437)
#11 0x000000000757eefb clang::ASTContext::getPreferredTypeAlign(clang::Type const*) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x757eefb)
#12 0x000000000757fa0b clang::ASTContext::getDeclAlign(clang::Decl const*, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x757fa0b)
#13 0x00000000048a064d clang::CodeGen::CodeGenFunction::EmitAutoVarAlloca(clang::VarDecl const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48a064d)
#14 0x00000000048a4ffb clang::CodeGen::CodeGenFunction::EmitVarDecl(clang::VarDecl const&) (.part.0) CGDecl.cpp:0:0
#15 0x00000000048a5807 clang::CodeGen::CodeGenFunction::EmitDecl(clang::Decl const&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48a5807)
#16 0x000000000446e42c clang::CodeGen::CodeGenFunction::EmitDeclStmt(clang::DeclStmt const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x446e42c)
#17 0x0000000004484204 clang::CodeGen::CodeGenFunction::EmitSimpleStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4484204)
#18 0x000000000447bc85 clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x447bc85)
#19 0x0000000004483cac clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope(clang::CompoundStmt const&, bool, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4483cac)
#20 0x00000000044e9e16 clang::CodeGen::CodeGenFunction::EmitFunctionBody(clang::Stmt const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44e9e16)
#21 0x00000000044fd32b clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44fd32b)
#22 0x0000000004567385 clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4567385)
#23 0x00000000045624f4 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x45624f4)
#24 0x000000000456290b clang::CodeGen::CodeGenModule::EmitGlobal(clang::GlobalDecl) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x456290b)
#25 0x000000000456d5d3 clang::CodeGen::CodeGenModule::EmitTopLevelDecl(clang::Decl*) (.part.0) CodeGenModule.cpp:0:0
#26 0x000000000494a9e6 (anonymous namespace)::CodeGeneratorImpl::HandleTopLevelDecl(clang::DeclGroupRef) ModuleBuilder.cpp:0:0
#27 0x000000000493a614 clang::BackendConsumer::HandleTopLevelDecl(clang::DeclGroupRef) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x493a614)
#28 0x00000000066323a4 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66323a4)
#29 0x0000000004946b78 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4946b78)
#30 0x0000000004c3eb45 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c3eb45)
#31 0x0000000004bbd78e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4bbd78e)
#32 0x0000000004d31629 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4d31629)
#33 0x0000000000dace0f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdace0f)
#34 0x0000000000da2fda ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#35 0x00000000049ade69 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
#36 0x0000000003ede004 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ede004)
#37 0x00000000049ae47f 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
#38 0x000000000497024d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x497024d)
#39 0x00000000049712de clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x49712de)
#40 0x00000000049795c5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x49795c5)
#41 0x0000000000da8d78 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xda8d78)
#42 0x0000000000c2e774 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc2e774)
#43 0x00007cb124429d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#44 0x00007cb124429e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#45 0x0000000000da2a85 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xda2a85)
```

## Program

```
#include <iostream>
using namespace std;
int main()
{
 auto s{new auto(one)};
}
```

## To quickly reproduce

https://godbolt.org/z/dsj8zYaf6

</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzsWl1v2zgW_TXKC2FDImV9PORBcZJuB53doim62CeDIq9sTSlSQ1JpMr9-QUqOLMVp4yKe2cXuIFNYFHl5zuEl7xVJaky9lQCXweoqWF1f0M7ulL5sqK7BQoQxuSgVf7x8b9GOti1Ig77tQKLO1HKLaGcVUhJR1EkOVS2Bo3uqa1oKWAZh4f4wCTBBhTGgba3kUJqEw19YMEHlNsBX7o8UKMC3Wikb4Fsh7ptFq9VvwPaPAb61SgkT4Nuh2a2oywDfFnef-3_XSlp4sEvWtgEpcBwTZ7SvTIqAFJ8fW3gvK3VYNrbrn7dg99XeN60IcMaUNHZuJsBFgHPk37lenkgixwxHxSIgN1uw18A7BrxvkgU4X9bm750Q_QMKcBLgBAUYMyqlskjD7x0Yi-wOkKn_AKQqRKXX2BtCSiMOLUgO0vaDYL1tHOAUVbQWwJ38Hz_cFHc3yHRlU1tEUdltkYZWaYusQjtrW-PI4NsA325ru-vKJVPNKPVsAGpjOnDSIyo5qiUTHQcPkmlqdqik7KvVlEGA16jV0GrFwBjgyKhO98WuJTVGsZpa4Eh3Ehmm69YuZ14xus6dpewr4l3TPvedg3fEvQuXQZh_1GqraYOo3nYNSGsGt1KtY8FU09YC9AIeWqE06L0vLeh--MzC6k5-DfBtWcvR1ZyHosWWf6O6WsRosUUL5ezStnXWO9t2dmnQonG6ocXiIUsW1DQL8ygtfQjIdS0tCLSopFrcgy6VAfceLe7QYrFlbOFcm-1oLQNy_V28rrKRtDU7ZdGiYkooveA13UplbM1M34cflWnxA2IDj4Csh1EhN0FYRE64gKxBVQG5QS3VBjSiFoHkzv2qWkAQFnioNjYlhZtgKyfxhw9ffkXvP6EtSNDUzwNVIQ5M0OExwGnj6OE0CAvyPVvvBhtyi5jigCrv8i9YQgEmIQofwv1_pMpLTDPk_dhPV_No-h8fdS2td5vPvatmYyVNv22UsRpo4-fkGtXS9jM0eyP_CfBV-DDAC3A-gI9m4LOKxMfArwVQ2bX_kHf1VlK3fnTSr98cCeW6OAdUB2aEiidQgfMyydDaedonYOoe9GOP7W9UcuF6zAYNJ3Wmq3To_-_tk8F-ysoIx3GMVzgcSPUr_UOWbJJ4IWrZPSy2sutfsKVRy8RD9k1GwPHUYJ7kFUOt3WmgfPO1FuI06779aH01hxunCdoaL8GpsOM0GQ0nU8M4SyuCaOnW7pPM-oaj2fSZ2ag82WBUjgazqUGSQ56cZtA3GQ3mhw6WrlIeY35irJ5G6SE-H8Tqt54kA8qeg5vO4ZRDksQkfSWHvwa_Rzjij2ZjAFCVP8D_UUMFWvdZTiHqrfyLRsJhHZngGZOKhj9icg1MHCHgig8IrFGplDgnEQd1JEIOicQZDZN4Mi3WisM7kJOH204yn3P7wpumtkVn1ReqCyEUo1N-X6g-pJicIZgMsEdS8YxUXE397HWkBuSvorNsqbbL0Aekd67CLAQ5VKsZqlUWpqejeg5phmf0oLeX2UEeZU4mhOIEYsx-jtCdbexzUq70rH7TQx4JpVNCWYzD-HRCd3XTCnhO6ZCOn-ljJlZoTR8_QRWQ9eEiYq0eG5Cbs0jgSY4SZFMJ0pJlq5-Q4L-EvKc3ks9n408Y_QmHXqumVZ3kjvI_a7tTnb1jyn-jT2yNtY7M3vWL_Rbb7RcqOrgT6hwfEQPtJ1FwOBUFcoiS00XZl1wp_vhdzzgDIQ95JBRNCVWc4BOjw_AVCe7llMw7oUoq-jX60Mef2vfO_2Jv7_YV-62kc659nveoyiSjiVdJSn488X9VvBMwDnLPfk_hGqpa1j3r12jUl3vfPpMn9KxGzmTGGcfVD9f745z_E7k6NiPXeM41D3_o9ce5vszwLCzyg3QVr2Ys-IqTU1l8Vu0HuAdxPJMah-Mwpzu09Dy1w9NMKI9pDv5rlUolHxvVGSRpA6b1O0P5BJ1bSJT2n5i-uN_g-D7Gd1p1rYuYOEc9pquuFhz0EWjTnCYnNIkmPn5F2VeQfK2k6RrQPwfirYe9hzkO-yQrSRKCCZ2Q-Ei1Ab9XP4ks0NBZUD1TajxAGgHnM4dIyjQ74qfFYZR8ANZZGIr2W_hvrKsH8gRzursZMwJlPFn0b7X7iJX8CM4zIewxjAinwboseZoBmqVRrs_30lgqGRzX8mVK5wmuPc6RxTS4chIl7gN_BDXgHcncK0afY39G9jyho8c3op-EyZBTBmGFGIs2_VZ5djyV39FZ_r5G0zK8Rveq5uch0aMcOcQzDrjiFO1lX0ef_bpwwOSuoUJ8Afa0Nh8hlExjurMxbPpMMjeu6_tjSzOZBrOcckhyL8mB0WpIpjbaq-rf9lOvP9kISMGoECVlXzeVnH5C9R0PrrOO1qppqOTzWXx09Iwd6qnW9U6dAAfiWF3Lra95MwztU4PNhj08RFH_UFJTs43x1QcJJ5VdwcZqWluzfz0zR_2WklX64L2rcrBVNjks9QePqaBNyWmA01EqnO2PMn5R5ZHBSGYHEBCGh2clx44Z-jefOnlHKxCPEy2_P25nOFDpEY8OP4v7FOK0Qv_LzjFL6Y57wXT7I09DPN0OnajmR40-i4x7KSdL96yhqzD56n9d1WK2w3eWPeKB9uhKs2QmjTCHU0X5RZXmZUV-UeWH2kz3Qb63Fj95QEtrN_j-LPD1Ig5u8qdI6cR6kjIOZ1LmK7Z6Cfb1we9JgnAkM3hpCP5EKc-QrXp5RvGiWQzP-D6p3mcie_B-KSme7TS-FKHfPPdwyEbck-wvZBjSNEYO8Vt33JseO54deuOc5yceevsmo8F4bhDiEG02rs3GWKrt5oDWq7uA-KCL1TxRo9kK9cbffpyc8aHro3eEhis_zy8IBZjsLyq5ObO_3eHvvPR32J4--PtwdRWERS0tGhx16DR1xf1NKxOkVxK--YcAZ0r6VSO97pu6Hy-B_KzQ713NvopH5C9H8Y5BX2F2FUvxUgm7VHob4Ns_AnzLzW_ZH_-iVRKExQW_JDwnOb2AyyiN01W2imJ8sbssaVISzquQlClfpSxlKSkTAjxLKedJflFf4hCvwlWURUmUh3hZlknFiFvtYryihARxCA2txdLNRNf9hb_ydRnFYZxEF4KWIIy_KYjxMEY4WF1f6Et_U6zstiaIQ1Eba0YTtrYCLv9_M2-8mYfuasmGwIyi6KLT4vLnL-MNg3N_if8dAAD__4SqwQo">