<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Issue</th>
<td>
<a href=https://github.com/llvm/llvm-project/issues/84087>84087</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>
ICE on valid code during LLVM IR generation
</td>
</tr>
<tr>
<th>Labels</th>
<td>
new issue
</td>
</tr>
<tr>
<th>Assignees</th>
<td>
</td>
</tr>
<tr>
<th>Reporter</th>
<td>
ericniebler
</td>
</tr>
</table>
<pre>
```
[build] [1/2 50% :: 2.757] /usr/bin/clang++-17 -DSTDEXEC_ENABLE_EXTRA_TYPE_CHECKING -I/home/eniebler/Code/stdexec/include -fsanitize=address -Wsign-conversion -Wnarrowing -Werror -g -std=c++20 -Wall -ferror-limit=0 -fmacro-backtrace-limit=0 -ftemplate-backtrace-limit=0 -MD -MT examples/CMakeFiles/example.hello_world.dir/hello_world.cpp.o -MF examples/CMakeFiles/example.hello_world.dir/hello_world.cpp.o.d -o examples/CMakeFiles/example.hello_world.dir/hello_world.cpp.o -c /home/eniebler/Code/stdexec/examples/hello_world.cpp
[build] FAILED: examples/CMakeFiles/example.hello_world.dir/hello_world.cpp.o
[build] /usr/bin/clang++-17 -DSTDEXEC_ENABLE_EXTRA_TYPE_CHECKING -I/home/eniebler/Code/stdexec/include -fsanitize=address -Wsign-conversion -Wnarrowing -Werror -g -std=c++20 -Wall -ferror-limit=0 -fmacro-backtrace-limit=0 -ftemplate-backtrace-limit=0 -MD -MT examples/CMakeFiles/example.hello_world.dir/hello_world.cpp.o -MF examples/CMakeFiles/example.hello_world.dir/hello_world.cpp.o.d -o examples/CMakeFiles/example.hello_world.dir/hello_world.cpp.o -c /home/eniebler/Code/stdexec/examples/hello_world.cpp
[build] PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
[build] Stack dump:
[build] 0. Program arguments: /usr/bin/clang++-17 -DSTDEXEC_ENABLE_EXTRA_TYPE_CHECKING -I/home/eniebler/Code/stdexec/include -fsanitize=address -Wsign-conversion -Wnarrowing -Werror -g -std=c++20 -Wall -ferror-limit=0 -fmacro-backtrace-limit=0 -ftemplate-backtrace-limit=0 -MD -MT examples/CMakeFiles/example.hello_world.dir/hello_world.cpp.o -MF examples/CMakeFiles/example.hello_world.dir/hello_world.cpp.o.d -o examples/CMakeFiles/example.hello_world.dir/hello_world.cpp.o -c /home/eniebler/Code/stdexec/examples/hello_world.cpp
[build] 1. <eof> parser at end of file
[build] 2. Per-file LLVM IR generation
[build] 3. /home/eniebler/Code/stdexec/include/stdexec/__detail/__basic_sender.hpp:464:7: Generating code for declaration 'stdexec::__detail::__captures'
[build] #0 0x00007f71e7ecc406 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/lib/llvm-17/bin/../lib/libLLVM-17.so.1+0xccc406)
[build] #1 0x00007f71e7eca5b0 llvm::sys::RunSignalHandlers() (/usr/lib/llvm-17/bin/../lib/libLLVM-17.so.1+0xcca5b0)
[build] #2 0x00007f71e7e20d70 (/usr/lib/llvm-17/bin/../lib/libLLVM-17.so.1+0xc20d70)
[build] #3 0x00007f71e6a42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
[build] #4 0x00007f71e7fe6943 llvm::Instruction::eraseFromParent() (/usr/lib/llvm-17/bin/../lib/libLLVM-17.so.1+0xde6943)
[build] #5 0x00007f71f05e5df0 (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1be5df0)
[build] #6 0x00007f71f05e74cd (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1be74cd)
[build] #7 0x00007f71f05db2bf clang::CodeGen::CodeGenFunction::EmitAggExpr(clang::Expr const*, clang::CodeGen::AggValueSlot) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1bdb2bf)
[build] #8 0x00007f71f071383a clang::CodeGen::CodeGenFunction::EmitReturnStmt(clang::ReturnStmt const&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d1383a)
[build] #9 0x00007f71f071bb6c clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope(clang::CompoundStmt const&, bool, clang::CodeGen::AggValueSlot) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d1bb6c)
[build] #10 0x00007f71f0774c0a clang::CodeGen::CodeGenFunction::EmitFunctionBody(clang::Stmt const*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d74c0a)
[build] #11 0x00007f71f0775884 clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d75884)
[build] #12 0x00007f71f0795549 clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d95549)
[build] #13 0x00007f71f078ed78 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d8ed78)
[build] #14 0x00007f71f07827b3 clang::CodeGen::CodeGenModule::EmitDeferred() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d827b3)
[build] #15 0x00007f71f07827cf clang::CodeGen::CodeGenModule::EmitDeferred() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d827cf)
[build] #16 0x00007f71f07827cf clang::CodeGen::CodeGenModule::EmitDeferred() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d827cf)
[build] #17 0x00007f71f07827cf clang::CodeGen::CodeGenModule::EmitDeferred() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d827cf)
[build] #18 0x00007f71f07827cf clang::CodeGen::CodeGenModule::EmitDeferred() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d827cf)
[build] #19 0x00007f71f07827cf clang::CodeGen::CodeGenModule::EmitDeferred() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d827cf)
[build] #20 0x00007f71f07808bb clang::CodeGen::CodeGenModule::Release() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d808bb)
[build] #21 0x00007f71f0828118 (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1e28118)
[build] #22 0x00007f71f076b420 (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x1d6b420)
[build] #23 0x00007f71ef437816 clang::ParseAST(clang::Sema&, bool, bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa37816)
[build] #24 0x00007f71f11570c5 clang::FrontendAction::Execute() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x27570c5)
[build] #25 0x00007f71f10d26c4 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x26d26c4)
[build] #26 0x00007f71f11d0e84 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x27d0e84)
[build] #27 0x000055b2959bd856 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/usr/bin/clang++-17+0x12856)
[build] #28 0x000055b2959bb3c5 (/usr/bin/clang++-17+0x103c5)
[build] #29 0x00007f71f0d94c59 (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x2394c59)
[build] #30 0x00007f71e7e20b0c llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/usr/lib/llvm-17/bin/../lib/libLLVM-17.so.1+0xc20b0c)
[build] #31 0x00007f71f0d9449e clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x239449e)
[build] #32 0x00007f71f0d5d40d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x235d40d)
[build] #33 0x00007f71f0d5d66e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x235d66e)
[build] #34 0x00007f71f0d791ed clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x23791ed)
[build] #35 0x000055b2959bad2d clang_main(int, char**, llvm::ToolContext const&) (/usr/bin/clang++-17+0xfd2d)
[build] #36 0x000055b2959c7562 main (/usr/bin/clang++-17+0x1c562)
[build] #37 0x00007f71e6a29d90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
[build] #38 0x00007f71e6a29e40 call_init ./csu/../csu/libc-start.c:128:20
[build] #39 0x00007f71e6a29e40 __libc_start_main ./csu/../csu/libc-start.c:379:5
[build] #40 0x000055b2959b7df5 _start (/usr/bin/clang++-17+0xcdf5)
[build] clang++-17: error: clang frontend command failed with exit code 139 (use -v to see invocation)
[build] Ubuntu clang version 17.0.6 (++20231209124227+6009708b4367-1~exp1~20231209124336.77)
[build] Target: x86_64-pc-linux-gnu
[build] Thread model: posix
[build] InstalledDir: /usr/bin
[build] clang++-17: note: diagnostic msg:
[build] ********************
[build]
[build] PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
[build] Preprocessed source(s) and associated run script(s) are located at:
[build] clang++-17: note: diagnostic msg: /tmp/hello_world-22be60.cpp
[build] clang++-17: note: diagnostic msg: /tmp/hello_world-22be60.sh
[build] clang++-17: note: diagnostic msg:
[build]
[build] ********************
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsWl1v47bS_jXKDSGDoj59kQvHH7vpm-0Gidvte2VQ5NjmKSUKJJV1zkV_-wFpO7Fsq032uMVZYIHFxubHzPM8HHJGMqkxYlUDXAfpTZBOrmhr10pfgxasFlBK0Fel4s_XAZ4EeLT7P8O7f9uv6U3ZCsmDdIKC9CYKyIwglOKApCiIR0E8QmSQp7nvJ7PW6IDMSlEHZMYkrVcBuQnITRjlKJw8zifT36bjxfTn0c3ddDH9bf4wWsz__366GH-cjv_v9ucPKLwNyGytKgjIDHYYAzIbK-5ajOWwARaQmaiZbDmgcGloLaz4NwTxhHKuwRgUfnG0Q6bqJ9BGqBqFX2qqtfoq6hUKv4DWSqNwhUJjeRBP2BYkwSj8QqVE4dKPCKWohA3iCUbhsqJMq7Ck7HerKYNOn4WqkdTC-e5PExR-miPY0KqRYBybT_R3mIntl137YA1SqsVXpSUfcOFIH7awphkoFH6aXcLOgKNQXQYQQ29brwNnR1ZOw2w2ur2bTlxkXQLimTD-EaY_wvS_D9P7u-nocYpMW1bCIorKdoU0NEpbZBVaW9sYd0CSWUBmK2HXbTlgqgrITMqn_Z-w0epfwKwLFWNa7xjRmqN94Ng1IKapWaOXRQvIGDUaGq0YGAMcGdXqbbObSY1RTFALHOm2RoZp0djBKfxHS9nviLdV41CedONBgIf3Wq00rRDVq7aC2jpCP7bPj-1zie0TuQAL4jGoZRBPUUO1AY2oRVBzpJZoKSScziI-LEGHrhvd3f36Cd0-oBXUoKkVqj6dEXs_7wm3TttiwcFSIf3HkhrBFgZqDnqwbtzOSbIkiEe52xgfdijqFWKKA1oqjTgwSbfQUEDyvV1fOL2Y3n1jtLGtdurl55JWjBHeYIxxvswjyIGxBGfIHybegHk22w_3WtTWb-_59rwoXgdp-nWhjNVAq4Bk7swQtQ3IEAWkeNnYUpT78ynKXzb6YPDaJUonfRjlA6MGUUBu8IZ5PAEZnmJ34KMj8DQt8TnwD239KFY1lR9pzSVo44FdBJ9z2YuPdPERzHN8AafeTq_T-NBpRhOSkr3Trc1NkS2yJJSibjfhqm63Hcw5yLwDP6XXftIhtYRsmMQHot_WxuqW-X3jG0BTAzOtqnuqwcXFZaTn3nEvyvQA5RKnkPLl-6X3aSh055Vzm3u_Uelt9TrOjhznCeOXcuxs9TrOu455Scol2iZSvw7uZPoAdefLrK0PVmpaCTtaraabRgekOJjqWhBTtbEBGbn93Wd2tFr9SmULj1J90wFwnren0su76PDOo7iI6ft5P4Btdf1oK9ul_tq-FyC7GDHusfYSGx4RK8uMvZ_YWFWNamvuKHwRdq1a-8hUA12ah6MOiI5RqZT8x1ece65nhXGnPu4KkycMf8OK71tuFH_uinEowuhypDzOXlLREam0KJL3kdqVCrAtQQ4JfZCqpHICzC_l61n9Mv_Pd_X4w37gbb1Uf8M-8GR7lSFdZYZpmgz_SplPircSXhd7q8CexgSWwpX-jvlbdNq2-zi_aER4Kr284y7vAnhefBvv_xW-nkIv3-SIL8nL-L18J-AewIB_Y5XRA9sh6YWdnsBmf5l3_ynY7HzadLCz7xN2_n3CLr5P2MPvEjY5KhAKXJTle2A_gARq4LKIHYhexN3sX5AiiorLOAZvq9fxUXLNyoRc6DmJe1u9jjuPqcskzosoO1yje6oNjB7nR6UZVPSoMt3-vcwyUQ-jF3MnQ0VRmmOWHmKeaVVbqPnosNTcAGvtJWOJ5N5xL8pOQoowJxk7qiSrRkjQ7kmd1gw6OHfQO6If0bpc5UcyD66XSdbVm2Po1sQ7zK-EnhSjp_hPCF-upiG5B9XLYJ-u0rQkw3RY8iLNEGPRoqLOw8FLtJHW9PkBlkE8Zmt68LgdT31t3mkjY_SkBD9D5Nz78-1-JEXaH9nFEc4yZukb7eL4T2Kxm0D4MGHphYSPva0-x8fvNQkuMTuocMeamvUDMPUE-nnswntjX98V0iXI587qLHdPDgvtV8iJv6Ux9OtziVeJHmIvn-hYyGQIh1uBa_EEekduHI1VVdGaHx9BZ8PN_5Lh2lTjKFIZxOPXgY9Wi3rlR053sfgyYbFgm00Ubb_s3mP74bsg7gx2DQurqbBm331kjkrp9q_SB_1uyOj1mPfx7rfBxaIoGUKv6t3syFOeYN6ruj9l6MnJv1-KzpF0NNEN6Lx2edvQUScVXlYYz7VXmPhYmCzrD8ceYX5SpelX5SdV3gnTfRl1EJUVlfJXYFbp26qRh1HcUOECyP8E8XYhd6H2N8qZZf1x1n305fkwgt44mxx87iTAM5mvbxn-QTkvddx7TXoFTI_yF-VkJ-A-0-4J-GNptDtUXhWYKyV3eaD3BVdvDlxy0g8t60JjeZoR5EC9Mb-yNCO9xvPujz1kyIcYLRZOxYWxVNsFo1J6DZATmZl2r7d5NhwaE5BZ3Vi5k_540mAdxKO0COJRlJ1HUBwjgAQjP1_Uwh473X50nkLvacCcaeIckHOXw0jceQ3-4qBD8Ry7s47ifOjonPWT4KMQyvkyRVsPb1spxpfnC6GjsfEI-UsC7oPvQstdgY3Ybh8tqZDA0Vdh1wg2wm5_-41iH4-tARQ-IauQAUDioOg94_uXsq1tu_Ozv9MQ5QM8yLasttcXSBwRPIxIQogjk2E8zHFRJnGWh9EfsGmiPw4GxXE2yPOz_uZUr8CVUmj3M2PDDn5pPB2-1kA5qhQH6SY1yojN6TBfuUsJfCL0yXWRN-hdK-secxAXdFUrYwVDlVl5S2diYfTt_06t9V3xGc3no_FHNP84RbPPd3efv9z-_AHNbu-mj2j-2Tff_PIBPUzvPz_Mz16muT93Xacw7tDqvbLzMkAD8rUWcETtWfPvEpHMbNV0L2iEhJSQ4fP3NC5l3Kwvvvp_Rzx0b79e8euYD-MhvYLrKMfDLC-GRXK1vk7KOMkLHJU0iWmOIWMxJymOGC6jnNPsSlwTTBIc45SQZJgkAyBZGUEeQxpnaUaWQYKhokIOXGIbKL268jfArosEF_mVpCVI4-_tElLDV-Q7A0KCdHKlr31WLtuVCRIshbHm1YoVVsL17XiKVI2eqBR8eyLx1lX7Z67MXLVaXn_7dTWP9z8BAAD__87jOtc">