DKLoehr wrote:
I don't know if this is the same as the other crash report, but we're also
seeing assert failures when building chromium. I've minimized the repro to the
following program:
```
template <typename T> struct S {
using typename T::Ty;
static Ty Val;
};
template <typename T>
S<T>::Ty S<T>::Val;
```
This fails when running `clang++ -c repro.cc` when clang is built with asserts
(`-std=c++20` silences a warning but isn't necessary). The crash looks like
this:
```
llvm-project/clang/include/clang/AST/TypeLoc.h:79: T clang::TypeLoc::castAs()
const [T = clang::DependentNameTypeLoc]: Assertion `T::isKind(*this)' failed.
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: clang++ -c repro.cc
1. p.cc:6:19: current parser token ';'
<snip long backtrace>
clang++: error: clang frontend command failed with exit code 134 (use -v to see
invocation)
clang version 22.0.0git (https://github.com/llvm/llvm-project.git
91cdd35008e9ab32dffb7e401cdd7313b3461892)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Build config: +assertions
```
https://github.com/llvm/llvm-project/pull/147835
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