[Bug rust/108084] New: AArch64 Linux bootstrap failure in rust

[ktkachov at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108084

            Bug ID: 108084
           Summary: AArch64 Linux bootstrap failure in rust
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Keywords: build
          Severity: normal
          Priority: P3
         Component: rust
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ktkachov at gcc dot gnu.org
                CC: dkm at gcc dot gnu.org
  Target Milestone: ---
              Host: aarch64-none-linux-gnu
            Target: aarch64-none-linux-gnu

Congratulations on getting the rust frontend committed!
When trying a bootstrap on aarch64-none-linux with
--enable-languages=c,c++,fortran,rust I get a -Werror=nonnull failure

In file included from $SRC/gcc/rust/parse/rust-parse.h:730,
                 from $SRC/gcc/rust/expand/rust-macro-builtins.cc:25:
$SRC/gcc/rust/parse/rust-parse-impl.h: In member function
'Rust::AST::ClosureParam
Rust::Parser<ManagedTokenSource>::parse_closure_param() [with
ManagedTokenSource = Rust::Lexer]':
$SRC/gcc/rust/parse/rust-parse-impl.h:8916:70: error: 'this' pointer is null
[-Werror=nonnull]
 8916 |                             std::move (type), std::move (outer_attrs));
      |                                                                      ^
In file included from $SRC/gcc/rust/parse/rust-parse.h:730,
                 from $SRC/gcc/rust/expand/rust-macro-expand.h:23,
                 from $SRC/gcc/rust/expand/rust-macro-expand.cc:19:
$SRC/gcc/rust/parse/rust-parse-impl.h: In member function
'Rust::AST::ClosureParam
Rust::Parser<ManagedTokenSource>::parse_closure_param() [with
ManagedTokenSource = Rust::MacroInvocLexer]':
$SRC/gcc/rust/parse/rust-parse-impl.h:8916:70: error: 'this' pointer is null
[-Werror=nonnull]
 8916 |                             std::move (type), std::move (outer_attrs));
      |                                                                      ^
In file included from $SRC/gcc/rust/parse/rust-parse.h:730,
                 from $SRC/gcc/rust/rust-session-manager.cc:23:
$SRC/gcc/rust/parse/rust-parse-impl.h: In member function
'Rust::AST::ClosureParam
Rust::Parser<ManagedTokenSource>::parse_closure_param() [with
ManagedTokenSource = Rust::Lexer]':
$SRC/gcc/rust/parse/rust-parse-impl.h:8916:70: error: 'this' pointer is null
[-Werror=nonnull]
 8916 |                             std::move (type), std::move (outer_attrs));