message: Update for changes in LocalDecl on nightly.
diff: @@ -259,31 +259,36 @@ impl<'a, 'tcx> EvalContext<'a, 'tcx> {
  mutability: mir::Mutability::Mut,
  ty: tcx.mk_nil(),
  name: None,
  - source_info: None,
  + source_info,
  + is_user_variable: false,
  },
  mir::LocalDecl {
  mutability: mir::Mutability::Mut,
  ty: tcx.mk_mut_ptr(tcx.mk_slice(tcx.mk_param(0, Symbol::intern("T")))),
  name: None,
  - source_info: None,
  + source_info,
  + is_user_variable: false,
  },
  mir::LocalDecl {
  mutability: mir::Mutability::Mut,
  ty: tcx.types.usize,
  name: None,
  - source_info: None,
  + source_info,
  + is_user_variable: false,
  },
  mir::LocalDecl {
  mutability: mir::Mutability::Mut,
  ty: tcx.types.usize,
  name: None,
  - source_info: None,
  + source_info,
  + is_user_variable: false,
  },
  mir::LocalDecl {
  mutability: mir::Mutability::Mut,
  ty: tcx.types.bool,
  name: None,
  - source_info: None,
  + source_info,
  + is_user_variable: false,
  },
  ];
  let seq_drop_glue = mir::Mir::new(
  