| Issue |
125439
|
| Summary |
clang ICE when decltype'ing a capture inside a lambda using deducing this
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
foonathan
|
Source:
```cpp
void foo()
{
int x;
[x](this auto const&) { decltype(x) y; }();
}
```
Compile:
```
$ clang++ -std=c++23 test.cpp
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-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 -std=c++23 <source>
1. <eof> parser at end of file
2. Per-file LLVM IR generation
3. <source>:4:5: Generating code for declaration 'foo()::(anonymous class)::operator()'
#0 0x0000000003b10418 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3b10418)
#1 0x0000000003b0e55c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3b0e55c)
#2 0x0000000003a5d898 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x0000703df5242520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x0000000006ef39dc clang::ASTContext::getTypeInfoImpl(clang::Type const*) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6ef39dc)
#5 0x0000000006ede4eb clang::ASTContext::getTypeInfo(clang::Type const*) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6ede4eb)
#6 0x0000000006ef393f clang::ASTContext::getAlignOfGlobalVar(clang::QualType, clang::VarDecl const*) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6ef393f)
#7 0x00000000353ecd50
clang++: error: clang frontend command failed with exit code 139 (use -v to see invocation)
```
https://godbolt.org/z/x6Pfh7Yqn
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