| Issue |
173019
|
| Summary |
clang++ ICE on Windows when calling templated function with lambda and function pointer argument (C++20)
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
elecfrog
|
**Description**
clang++ crashes with an access violation while parsing a C++ source file.
This is a clang frontend crash (ICE) that occurs during parsing of a function body.
The compiler crashes instead of emitting a diagnostic.
**Environment**
OS: Windows 10 x64
clang++ --version:
clang version 21.1.6
Target: x86_64-pc-windows-clang
Thread model: posix
InstalledDir: C:\Users\Administrator\scoop\apps\llvm\21.1.6\bin
**Source code (reproducer)**
template <typename T, typename Callback>
static inline void Combo(
const char* label,
T& current_index,
std::vector<const char*> items,
Callback on_changed,
int popup_max_height_in_items = -1)
{
Int current_index_int = static_cast<Int>(current_index);
if (ImGui::Combo(label,
¤t_index_int,
items.data(),
static_cast<Int>(items.size()),
popup_max_height_in_items))
{
if (current_index_int != static_cast<Int>(current_index))
{
current_index = static_cast<T>(current_index_int);
on_changed(current_index);
}
}
}
template <typename T, typename Callback>
static inline void Combo(
const char* label,
T& current_index,
int count,
const char* (*getter)(T),
Callback on_changed,
int popup_max_height_in_items = -1)
{
Int current_index_int = static_cast<Int>(current_index);
auto item_getter = [](void* data, int idx, const char** out_text) -> bool {
auto func = reinterpret_cast<const char* (*)(T)>(data);
*out_text = func(static_cast<T>(idx));
return true;
};
if (ImGui::Combo(label,
¤t_index_int,
item_getter,
reinterpret_cast<void*>(getter),
count,
popup_max_height_in_items))
{
if (current_index_int != static_cast<Int>(current_index))
{
current_index = static_cast<T>(current_index_int);
on_changed(current_index);
}
}
}
// Call site
ImGuiExt::Combo<GeometryType, void(GeometryType)>(
"Geometry Type",
m_CurrentGeometryType,
GeometryFactory::GetCount(),
GeometryFactory::GetName,
[this](GeometryType type) {
ReGenerateGeometry(type);
});
**Crash backtrace**
`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: C:\\Users\\Administrator\\scoop\\apps\\llvm\\current\\bin\\clang++.exe -DD3D11_SUPPORTED=1 -DD3D12_SUPPORTED=1 -DDILIGENT_DEBUG -DDILIGENT_DEVELOPMENT -DDILIGENT_RENDER_STATE_CACHE_SUPPORTED=1 -DDILIGENT_VK_SHARED=1 -DFMT_SHARED -DGLES_SUPPORTED=0 -DGLFW_DLL -DGL_SUPPORTED=1 -DIMGUI_DEFINE_MATH_OPERATORS -DMETAL_SUPPORTED=0 -DPLATFORM_WIN32=1 -DSPDLOG_COMPILED_LIB -DSPDLOG_FMT_EXTERNAL -DSPDLOG_SHARED_LIB -DVK_USE_PLATFORM_WIN32_KHR -DVULKAN_SUPPORTED=1 -DWEBGPU_SUPPORTED=0 -ID:/Dev/sparrow/sparrow -ID:/Dev/sparrow/sparrow/.. -ID:/Dev/sparrow/sparrow/../third_party/DiligentCore -ID:/Dev/sparrow/sparrow/../third_party/DiligentTools -ID:/Dev/sparrow/sparrow/../third_party/DiligentTools/ThirdParty/args -ID:/Dev/sparrow/common -ID:/Dev/sparrow/third_party/DiligentCore/Common/interface -ID:/Dev/sparrow/third_party/DiligentCore/Platforms/Win32/interface -ID:/Dev/sparrow/third_party/DiligentCore/Platforms/Basic/interface -ID:/Dev/sparrow/third_party/DiligentCore/Primitives/interface -ID:/Dev/sparrow/third_party/DiligentCore/Platforms/interface -ID:/Dev/sparrow/third_party/DiligentCore/Graphics/GraphicsTools/interface -ID:/Dev/sparrow/third_party/DiligentCore/Graphics/GraphicsEngine/interface -ID:/Dev/sparrow/third_party/DiligentCore/Graphics/GraphicsEngineVulkan/interface -ID:/Dev/sparrow/third_party/DiligentTools/ThirdParty/imgui -ID:/Dev/sparrow/third_party/DiligentTools/Imgui/interface -ID:/Dev/sparrow/third_party/DiligentTools/TextureLoader/interface -isystem D:/Dev/sparrow/build/windows-clang-debug/vcpkg_installed/x64-windows/include -O0 -g -Xclang -gcodeview -std=gnu++20 -D_DEBUG -D_DLL -D_MT -Xclang --dependent-lib=msvcrtd -Wall -Wextra -Wpedantic -Wno-unused-parameter -Wno-nontrivial-memcall -MD -MT sparrow/CMakeFiles/sparrow_lib.dir/hello_cube.cpp.obj -MF sparrow\\CMakeFiles\\sparrow_lib.dir\\hello_cube.cpp.obj.d -o sparrow/CMakeFiles/sparrow_lib.dir/hello_cube.cpp.obj -c D:/Dev/sparrow/sparrow/hello_cube.cpp
1. D:/Dev/sparrow/sparrow/hello_cube.cpp:439:10: current parser token ')'
2. D:/Dev/sparrow/sparrow/hello_cube.cpp:24:1: parsing namespace 'spw'
3. D:/Dev/sparrow/sparrow/hello_cube.cpp:434:1: parsing function body 'spw::HelloCube::UpdateUI'
4. D:/Dev/sparrow/sparrow/hello_cube.cpp:434:1: in compound statement ('{}')
5. D:/Dev/sparrow/sparrow/hello_cube.cpp:436:5: in compound statement ('{}')
Exception Code: 0xC0000005
#0 0x00007ff7ca4330e9 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x8430e9)
#1 0x00007ff7ca42c729 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x83c729)
#2 0x00007ff7ca42c486 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x83c486)
#3 0x00007ff7ca42b8b9 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x83b8b9)
#4 0x00007ff7ca471bdf (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x881bdf)
#5 0x00007ff7cb08b29c (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x149b29c)
#6 0x00007ff7cb02fd46 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x143fd46)
#7 0x00007ff7cb025a17 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x1435a17)
#8 0x00007ff7cb0226b4 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x14326b4)
#9 0x00007ff7cb01fc37 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x142fc37)
#10 0x00007ff7cba3a323 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x1e4a323)
#11 0x00007ff7cba39d1c (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x1e49d1c)
#12 0x00007ff7cb396f0d (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x17a6f0d)
#13 0x00007ff7cb0ea7a6 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x14fa7a6)
#14 0x00007ff7cb0e5715 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x14f5715)
#15 0x00007ff7cb01d382 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x142d382)
#16 0x00007ff7cb1bb993 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x15cb993)
#17 0x00007ff7cb1b4927 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x15c4927)
#18 0x00007ff7cb1b377f (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x15c377f)
#19 0x00007ff7cb1b17ca (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x15c17ca)
#20 0x00007ff7cb1b13fc (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x15c13fc)
#21 0x00007ff7c9d40791 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x150791)
#22 0x00007ff7cb1b2739 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x15c2739)
#23 0x00007ff7cb1b1666 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x15c1666)
#24 0x00007ff7cbb16528 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x1f26528)
#25 0x00007ff7cbb161e1 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x1f261e1)
#26 0x00007ff7ca218af3 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x628af3)
#27 0x00007ff7ca21873d (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x62873d)
#28 0x00007ff7ca2153f6 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x6253f6)
#29 0x00007ff7ca211f58 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x621f58)
#30 0x00007ff7ca2107ee (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x6207ee)
#31 0x00007ff7caafde2d (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0xf0de2d)
#32 0x00007ff7ca3a1235 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x7b1235)
#33 0x00007ff7ca3a1028 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x7b1028)
#34 0x00007ff7ca0c4de5 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x4d4de5)
#35 0x00007ff7ca0c472e (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x4d472e)
#36 0x00007ff7ca0c430d (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x4d430d)
#37 0x00007ff7ca0bb046 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x4cb046)
#38 0x00007ff7ca0b85e3 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x4c85e3)
#39 0x00007ff7cbbdbd70 (C:\Users\Administrator\scoop\apps\llvm\current\bin\clang++.exe+0x1febd70)
#40 0x00007ff848927344 (C:\Windows\System32\KERNEL32.DLL+0x17344)
#41 0x00007ff849aa26b1 (C:\Windows\SYSTEM32\ntdll.dll+0x526b1)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)`
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