[clang] 19.0.0 aborts due to Assertion !T->isDependentType() && "should not see dependent types here" failed in tools/clang/include/clang/AST/TypeNodes.inc

[bjrjk]

Compile the following 1.cpp with command line clang++ -Xclang -fdump-record-layouts-complete 1.cpp cause a clang abort:

template <class Pointer>
struct AllocationResult {
  Pointer ptr = nullptr;
  int count = 0;
};
int main(){}

The attachment is crash backtrace, preprocessed source, and associated run script.
crashsite.zip

[Sirraide]

Looking at the patch that added this (https://reviews.llvm.org/D104484), we may be trying to dump an uninstantiated class template, which doesn’t really make sense.

We’re also printing the layout of both __NSConstantString_tag and __va_list_tag, which seems a bit questionable. Perhaps we should skip implicitly defined records here.

[Sirraide]

Yeah, looks like that’s the problem.

[llvmbot]

@llvm/issue-subscribers-clang-frontend

Author: Jack Ren (bjrjk)

Compile the following `1.cpp` with command line `clang++ -Xclang -fdump-record-layouts-complete 1.cpp` cause a clang abort: ```cpp template <class Pointer> struct AllocationResult { Pointer ptr = nullptr; int count = 0; }; int main(){} ```

The attachment is crash backtrace, preprocessed source, and associated run script.
crashsite.zip