No fields in initializer - Internal compiler error

[MahadMuhammad]

No fields in initializer - Internal compiler error - E0063

• Fixing this issue, help [E0063] constructor is missing fields #2387 to emit more user friendly error code and error emission similiar to rustc.
• You can view the same on compiler-explorer

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I tried the modified code from E0063:

• No field in initializer

// https://doc.rust-lang.org/error_codes/E0063.html
struct Foo {
    x: i32,
    y: i32,
}

fn main() {
    let x = Foo { }; // error: No Field
}

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I expected to see this happen:

• Emit error message, similiar to rustc .i.e.,
  • emit the name of initializer & field
• Error message emitted by rustc:

missing fields `x`, `y` in initializer of `Foo`

---

Instead, this happened:

• Internal Compile Error.
• This is the output of gccrs:

➜  gccrs-build gcc/crab1 /home/mahad/Desktop/mahad/gccrs/gcc/testsuite/rust/compile/missing_constructor_fields.rs
crab1: internal compiler error: in visit, at rust/backend/rust-compile-expr.cc:405
0x7bd9e5 Rust::Compile::CompileExpr::visit(Rust::HIR::StructExprStruct&)
	../../gccrs/gcc/rust/backend/rust-compile-expr.cc:405
0xc63414 Rust::Compile::CompileExpr::Compile(Rust::HIR::Expr*, Rust::Compile::Context*)
	../../gccrs/gcc/rust/backend/rust-compile-expr.cc:45
0xc62286 Rust::Compile::CompileStmt::visit(Rust::HIR::LetStmt&)
	../../gccrs/gcc/rust/backend/rust-compile-stmt.cc:63
0xc62421 Rust::Compile::CompileStmt::Compile(Rust::HIR::Stmt*, Rust::Compile::Context*)
	../../gccrs/gcc/rust/backend/rust-compile-stmt.cc:34
0xc8a79b Rust::Compile::HIRCompileBase::compile_function_body(tree_node*, Rust::HIR::BlockExpr&, Rust::TyTy::BaseType*)
	../../gccrs/gcc/rust/backend/rust-compile-base.cc:476
0xc8c84e Rust::Compile::HIRCompileBase::compile_function(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Rust::HIR::SelfParam&, std::vector<Rust::HIR::FunctionParam, std::allocator<Rust::HIR::FunctionParam> >&, Rust::HIR::FunctionQualifiers const&, Rust::HIR::Visibility&, std::vector<Rust::AST::Attribute, std::allocator<Rust::AST::Attribute> >&, Location, Rust::HIR::BlockExpr*, Rust::Resolver::CanonicalPath const*, Rust::TyTy::FnType*)
	../../gccrs/gcc/rust/backend/rust-compile-base.cc:643
0xc6176e Rust::Compile::CompileItem::visit(Rust::HIR::Function&)
	../../gccrs/gcc/rust/backend/rust-compile-item.cc:181
0xa73659 Rust::Compile::CompileItem::compile(Rust::HIR::Item*, Rust::Compile::Context*, Rust::TyTy::BaseType*, bool, Location)
	../../gccrs/gcc/rust/backend/rust-compile-item.h:38
0xa73659 Rust::Compile::CompileCrate::go()
	../../gccrs/gcc/rust/backend/rust-compile.cc:47
0xa736a8 Rust::Compile::CompileCrate::Compile(Rust::HIR::Crate&, Rust::Compile::Context*)
	../../gccrs/gcc/rust/backend/rust-compile.cc:40
0xa6ec6a Rust::Session::compile_crate(char const*)
	../../gccrs/gcc/rust/rust-session-manager.cc:653
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.

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Meta

• What version of Rust GCC were you using, git sha 5437803.
• gccrs (Compiler-Explorer-Build-gcc-2f91d511200bf85558c9013b09a458c06edd1e02-binutils-2.40) 13.0.1 20230417 (experimental)

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[philberty]

I'm going to open this up for good-first-PR its a fairly nice one to sink your teeth into.

[robertgoss]

Hi I would like to pick this up if that is ok.