error[E0275]: overflow evaluating the requirement `SalsaStorage: RefUnwindSafe`
  --> $DIR/cycle-cache-err-60010.rs:69:5
   |
LL |     SourceDatabase::parse(db);
   |     ^^^^^^^^^^^^^^^^^^^^^
   |
   = note: required because it appears within the type `*const SalsaStorage`
   = note: required because it appears within the type `Unique<SalsaStorage>`
   = note: required because it appears within the type `Box<SalsaStorage>`
note: required because it appears within the type `Runtime<RootDatabase>`
  --> $DIR/cycle-cache-err-60010.rs:23:8
   |
LL | struct Runtime<DB: Database> {
   |        ^^^^^^^
note: required because it appears within the type `RootDatabase`
  --> $DIR/cycle-cache-err-60010.rs:20:8
   |
LL | struct RootDatabase {
   |        ^^^^^^^^^^^^
note: required because of the requirements on the impl of `SourceDatabase` for `RootDatabase`
  --> $DIR/cycle-cache-err-60010.rs:43:9
   |
LL | impl<T> SourceDatabase for T
   |         ^^^^^^^^^^^^^^     ^
note: required by `SourceDatabase::parse`
  --> $DIR/cycle-cache-err-60010.rs:14:5
   |
LL |     fn parse(&self) {
   |     ^^^^^^^^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0275`.