warning: function cannot return without recursing
  --> $DIR/infinite-function-recursion-error-8727.rs:8:1
   |
LL | fn generic<T>() {
   | ^^^^^^^^^^^^^^^ cannot return without recursing
LL |     generic::<Option<T>>();
   |     ---------------------- recursive call site
   |
   = help: a `loop` may express intention better if this is on purpose
   = note: `#[warn(unconditional_recursion)]` on by default

error: reached the recursion limit while instantiating `generic::<Option<Option<Option<Option<...>>>>>`
  --> $DIR/infinite-function-recursion-error-8727.rs:9:5
   |
LL |     generic::<Option<T>>();
   |     ^^^^^^^^^^^^^^^^^^^^^^
   |
note: `generic` defined here
  --> $DIR/infinite-function-recursion-error-8727.rs:8:1
   |
LL | fn generic<T>() {
   | ^^^^^^^^^^^^^^^
   = note: the full name for the type has been written to '$TEST_BUILD_DIR/infinite-function-recursion-error-8727.long-type-$LONG_TYPE_HASH.txt'
   = note: consider using `--verbose` to print the full type name to the console

error: aborting due to 1 previous error; 1 warning emitted