error: expected `}`, found `,`
  --> $DIR/issue-54379.rs:9:22
   |
LL |         MyStruct { .., Some(_) } => {},
   |                    --^
   |                    | |
   |                    | expected `}`
   |                    `..` must be at the end and cannot have a trailing comma

error: expected `,`
  --> $DIR/issue-54379.rs:9:28
   |
LL |         MyStruct { .., Some(_) } => {},
   |         --------           ^
   |         |
   |         while parsing the fields for this pattern

error: aborting due to 2 previous errors