Follow up to 4735
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Since Sep 6, 2026.
bug
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Description
Although #4735 is now fixed (#4844), it only outputs an error message because the self segment cannot be accepted alone, it needs enclosing braces.
The following code has the required braces and also ICE.
Code
use self::{self};
Meta
Error output
internal compiler error: in value, at rust/util/optional.h:1333
Backtrace
0x46a847f internal_error(char const*, ...)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/diagnostic-global-context.cc:787
0x46b4b1d fancy_abort(char const*, int, char const*)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/diagnostics/context.cc:1813
0x186f256 tl::optional<unsigned int>::value() &&
../../gcc/rust/util/optional.h:1333
0x18688c3 Rust::Analysis::Mappings::get_ast_crate_by_node_id_raw(unsigned int)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/util/rust-hir-map.cc:261
0x186c6cd Rust::Analysis::Mappings::insert_glob_container(unsigned int, Rust::AST::GlobContainer*)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/util/rust-hir-map.cc:1163
0x191a6cf Rust::Resolver2_0::Early::finalize_rebind_import(Rust::Resolver2_0::Early::ImportPair const&)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/resolve/rust-early-name-resolver-2.0.cc:582
0x191a9c4 Rust::Resolver2_0::Early::visit(Rust::AST::UseDeclaration&)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/resolve/rust-early-name-resolver-2.0.cc:624
0x16a2430 Rust::AST::UseDeclaration::accept_vis(Rust::AST::ASTVisitor&)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/ast/rust-ast.cc:4742
0x17331ad void Rust::AST::DefaultASTVisitor::visit<Rust::AST::Item>(std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> >&)
../../gcc/rust/ast/rust-ast-visitor.h:417
0x172cbc6 Rust::AST::DefaultASTVisitor::visit(Rust::AST::Crate&)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/ast/rust-ast-visitor.cc:39
0x1905754 Rust::Resolver2_0::DefaultResolver::visit(Rust::AST::Crate&)::$_0::operator()() const
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/resolve/rust-default-resolver.cc:41
0x19056a3 void Rust::Resolver2_0::CanonicalPathCtx::scope_inner<Rust::Resolver2_0::CanonicalPathCtx::scope_crate<Rust::Resolver2_0::DefaultResolver::visit(Rust::AST::Crate&)::$_0&>(unsigned int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, Rust::Resolver2_0::DefaultResolver::visit(Rust::AST::Crate&)::$_0&)::{lambda()#1}, Rust::Resolver2_0::DefaultResolver::visit(Rust::AST::Crate&)::$_0&>(unsigned int, Rust::Resolver2_0::DefaultResolver::visit(Rust::AST::Crate&)::$_0&, Rust::Resolver2_0::DefaultResolver::visit(Rust::AST::Crate&)::$_0&)
../../gcc/rust/resolve/rust-name-resolution-context.h:466
0x1902f47 void Rust::Resolver2_0::CanonicalPathCtx::scope_crate<Rust::Resolver2_0::DefaultResolver::visit(Rust::AST::Crate&)::$_0&>(unsigned int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, Rust::Resolver2_0::DefaultResolver::visit(Rust::AST::Crate&)::$_0&)
../../gcc/rust/resolve/rust-name-resolution-context.h:432
0x1902ef9 Rust::Resolver2_0::DefaultResolver::visit(Rust::AST::Crate&)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/resolve/rust-default-resolver.cc:51
0x191855a Rust::Resolver2_0::Early::go(Rust::AST::Crate&)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/resolve/rust-early-name-resolver-2.0.cc:81
0x1770897 Rust::Session::expansion(Rust::AST::Crate&, Rust::Resolver2_0::NameResolutionContext&)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/rust-session-manager.cc:1084
0x176e885 Rust::Session::compile_crate(char const*)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/rust-session-manager.cc:741
0x176e0b6 Rust::Session::handle_input_files(int, char const**)
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/rust-session-manager.cc:478
0x152a6c3 grs_langhook_parse_file()
/home/patryp/Documents/gccrs_bis/build/gcc/../../gcc/rust/rust-lang.cc:165
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