asb wrote:
This seems to be causing failures on all of my two-stage builders when
compiling X86LoadValueInjectionLoadHardening.cpp.
I believe this repro.cpp should demonstrate the issue:
```
namespace llvm {
class Use;
namespace rdf {
template <class T> struct NodeAddr {};
class UseNode;
using Use = NodeAddr<UseNode *>;
}
}
using namespace llvm;
namespace {
void f() {
using namespace rdf;
auto Use = 0;
}
}
```
Output:
```
/bin/clang++ -target x86_64-unknown-linux-gnu -std=c++17 -fsyntax-only repro.cpp
repro.cpp:16:8: error: reference to 'Use' is ambiguous
16 | auto Use = 0;
| ^
repro.cpp:7:7: note: candidate found by name lookup is 'llvm::rdf::Use'
7 | using Use = NodeAddr<UseNode *>;
| ^
repro.cpp:2:7: note: candidate found by name lookup is 'llvm::Use'
2 | class Use;
| ^
1 error generated.
exit code: 1
```
Checked manually, but minimised case and narrowing down the bad commit was
assisted by LLM.
https://github.com/llvm/llvm-project/pull/166004
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