| Issue |
140170
|
| Summary |
Clangd language server crashing when using C++ #embed macro.
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
Ankizle
|
I'm using the `#embed` macro in clangd to include some shader source into a header file. I have a setup like so:
shader/source.h:
```cpp
#pragma once
namespace frontend::shader {
const char source[] = {
// type declarations
#embed "type/camera.wgsl"
, '\n',
// globals
#embed "bindings.wgsl"
, '\n',
// logic
// entry points
#embed "visual.wgsl"
, '\n', 0,
};
} // namespace frontend::shader
```
init_shader.cpp:
```cpp
#include "shader/source.h"
#include "frontend/engine.h"
#include "frontend/util/str.h"
#include "webgpu/webgpu.h"
#include <vector>
namespace frontend {
void engine::init_shader() {
auto shader_src_desc = WGPUShaderSourceWGSL{
.chain =
WGPUChainedStruct{
.next = nullptr,
.sType = WGPUSType_ShaderSourceWGSL,
},
.code = util::string_view(shader::source),
};
auto shader_mod_desc = WGPUShaderModuleDescriptor{
.nextInChain = &shader_src_desc.chain,
.label = util::string_view("shader module"),
};
}
} // namespace frontend
```
But Clangd repeatedly crashes with the error:
```
/usr/bin/clang++ --driver-mode=g++ -fdiagnostics-color=always -g -Iinclude -Iexternal/glfw/include -Iexternal/imgui -Iexternal/wgpu-native/dist/include -c -fPIC -MMD -x c++-header -resource-dir=/home/user/.config/VSCodium/User/globalStorage/llvm-vs-code-extensions.vscode-clangd/install/19.1.2/clangd_19.1.2/lib/clang/19 -- /home/user/Project5/src/shader/source.h
I[21:05:50.999] --> windowDoneProgress/create(0)
I[21:05:50.999] Enqueueing 11 commands for indexing
I[21:05:50.999] <-- reply(0)
I[21:05:50.999] --> $/progress
I[21:05:50.999] --> $/progress
I[21:05:51.000] --> textDocument/clangd.fileStatus
I[21:05:51.000] --> textDocument/clangd.fileStatus
I[21:05:51.002] <-- textDocument/documentLink(3)
I[21:05:51.003] <-- textDocument/inlayHint(4)
I[21:05:51.004] Built preamble of size 239148 for file /home/user/Project5/src/shader/source.h version 15 in 0.00 seconds
I[21:05:51.004] Indexing c++17 standard library in the context of /home/user/Project5/src/shader/source.h
I[21:05:51.005] --> workspace/semanticTokens/refresh(1)
I[21:05:51.005] --> textDocument/clangd.fileStatus
I[21:05:51.005] <-- reply(1)
I[21:05:51.008] --> textDocument/publishDiagnostics
I[21:05:51.009] --> textDocument/inactiveRegions
I[21:05:51.009] --> textDocument/clangd.fileStatus
I[21:05:51.011] <-- textDocument/semanticTokens/full(5)
I[21:05:51.087] --> $/progress
I[21:05:51.087] --> $/progress
I[21:05:51.087] --> $/progress
I[21:05:51.200] <-- textDocument/foldingRange(6)
I[21:05:51.200] --> reply:textDocument/foldingRange(6) 0 ms
I[21:05:51.299] <-- textDocument/documentSymbol(7)
I[21:05:51.324] Built preamble of size 6906136 for file /home/user/Project5/src/init_shader.cpp version 1 in 0.32 seconds
I[21:05:51.324] --> workspace/semanticTokens/refresh(2)
I[21:05:51.324] <-- reply(2)
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0. /home/user/Project5/src/init_shader.cpp:15:43: current parser token 'source'
1. /home/user/Project5/src/init_shader.cpp:7:1: parsing namespace 'frontend'
2. /home/user/Project5/src/init_shader.cpp:8:28: parsing function body 'frontend::engine::init_shader'
3. /home/user/Project5/src/init_shader.cpp:8:28: in compound statement ('{}')
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0 clangd 0x000000000055715b
1 clangd 0x0000000000554fbe
2 clangd 0x0000000000557af6
3 libc.so.6 0x00007f9cb9932050
4 libc.so.6 0x00007f9ca0038fa0
Signalled during AST worker action: Build AST
Filename: frontend/src/init_shader.cpp
Directory: /home/user/Project5
Command Line: /usr/bin/clang++ --driver-mode=g++ -fdiagnostics-color=always -g -Iinclude -Iexternal/glfw/include -Iexternal/imgui -Iexternal/wgpu-native/dist/include -o build/init/shader.o -c -fPIC -MMD -resource-dir=/home/user/.config/VSCodium/User/globalStorage/llvm-vs-code-extensions.vscode-clangd/install/19.1.2/clangd_19.1.2/lib/clang/19 -- /home/user/Project5/src/init_shader.cpp
Version: 1
[Error - 9:05:52 PM] The Clang Language Server server crashed 5 times in the last 3 minutes. The server will not be restarted. See the output for more information.
[Error - 9:05:52 PM] Request textDocument/documentSymbol failed.
[object Object]
[Error - 9:05:52 PM] Request textDocument/codeAction failed.
[object Object]
[Error - 9:05:52 PM] Request textDocument/documentLink failed.
[object Object]
[Error - 9:05:52 PM] Request textDocument/inlayHint failed.
[object Object]
[Error - 9:05:52 PM] Request textDocument/semanticTokens/full failed.
[object Object]
[Error - 9:05:52 PM] Request textDocument/documentSymbol failed.
[object Object]
```
I believe this is due to using `#embed`, because removing them stops the crashing. Strangely, I am allowed to use one or two `#embed` macros, but using three causes a crash.
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