ICE ` attempting to expand node with id 12 into posi... | Rust-GCC/gccrs

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auto-reduced (treereduce-rust):

//@compile-flags: -frust-incomplete-and-experimental-compiler-do-not-use
type A = add_impl! { usize u8 u16 u32 u64    f32 f64 };

struct B;

original:

// { dg-options "-w" }
type A = add_impl! { usize u8 u16 u32 u64  /*isize i8 i16 i32 i64*/  f32 f64 };

struct B;

Version information:

c742973c23448e321fba4d9ff98a9092dc0df7ba

Command:
/home/matthias/vcs/github/gccrs/gccrs-build/gcc/crab1 -frust-incomplete-and-experimental-compiler-do-not-use

Program output

crab1: internal compiler error: at mvce.rs:1:10, attempting to expand node with id 12 into position with node id 14
0x300c7d8 internal_error(char const*, ...)
	../../gcc/diagnostic-global-context.cc:534
0xc986ba rust_be_internal_error_at(unsigned long, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
	../../gcc/rust/rust-diagnostics.cc:173
0xc9877d rust_internal_error_at(unsigned long, char const*, ...)
	../../gcc/rust/rust-diagnostics.cc:182
0xeb6680 Rust::ExpandVisitor::visit(Rust::AST::MacroInvocation&)
	../../gcc/rust/expand/rust-expand-visitor.cc:518
0xeb94fe void Rust::ExpandVisitor::expand_macro_children<std::vector<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> >, std::allocator<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> > > >, std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> > >(std::vector<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> >, std::allocator<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> > > >&, std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> > (Rust::AST::SingleASTNode::*)())
	../../gcc/rust/expand/rust-expand-visitor.h:134
0xeb94fe Rust::ExpandVisitor::expand_inner_items(std::vector<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> >, std::allocator<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> > > >&)
	../../gcc/rust/expand/rust-expand-visitor.cc:237
0xe7aff3 Rust::Session::expansion(Rust::AST::Crate&, Rust::Resolver2_0::NameResolutionContext&)
	../../gcc/rust/rust-session-manager.cc:953
0xe87f25 Rust::Session::compile_crate(char const*)
	../../gcc/rust/rust-session-manager.cc:618
Please submit a full bug report, with preprocessed source (by using -freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

Reproduce the ICE with the reduced Rust input and the listed compiler command. Start at Rust::ExpandVisitor::visit in gcc/rust/expand/rust-expand-visitor.cc:518, then read expand_macro_children in rust-expand-visitor.h:134; done means this input no longer aborts with the node-position internal compiler error.

Written by the indexing model from the issue text.

ICE ` attempting to expand node with id 12 into position with node id 14`

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