error: no rules expected the token `bcd`
  --> $DIR/trace_faulty_macros.rs:7:26
   |
LL | macro_rules! my_faulty_macro {
   | ---------------------------- when calling this macro
LL |     () => {
LL |         my_faulty_macro!(bcd);
   |                          ^^^ no rules expected this token in macro call
...
LL |     my_faulty_macro!();
   |     ------------------ in this macro invocation
   |
   = note: this error originates in the macro `my_faulty_macro` (in Nightly builds, run with -Z macro-backtrace for more info)

note: trace_macro
  --> $DIR/trace_faulty_macros.rs:31:5
   |
LL |     my_faulty_macro!();
   |     ^^^^^^^^^^^^^^^^^^
   |
   = note: expanding `my_faulty_macro! {  }`
   = note: to `my_faulty_macro! (bcd) ;`
   = note: expanding `my_faulty_macro! { bcd }`

error: recursion limit reached while expanding `my_recursive_macro!`
  --> $DIR/trace_faulty_macros.rs:22:9
   |
LL |         my_recursive_macro!();
   |         ^^^^^^^^^^^^^^^^^^^^^
...
LL |     my_recursive_macro!();
   |     --------------------- in this macro invocation
   |
   = help: consider increasing the recursion limit by adding a `#![recursion_limit = "8"]` attribute to your crate (`trace_faulty_macros`)
   = note: this error originates in the macro `my_recursive_macro` (in Nightly builds, run with -Z macro-backtrace for more info)

note: trace_macro
  --> $DIR/trace_faulty_macros.rs:32:5
   |
LL |     my_recursive_macro!();
   |     ^^^^^^^^^^^^^^^^^^^^^
   |
   = note: expanding `my_recursive_macro! {  }`
   = note: to `my_recursive_macro! () ;`
   = note: expanding `my_recursive_macro! {  }`
   = note: to `my_recursive_macro! () ;`
   = note: expanding `my_recursive_macro! {  }`
   = note: to `my_recursive_macro! () ;`
   = note: expanding `my_recursive_macro! {  }`
   = note: to `my_recursive_macro! () ;`

error: expected expression, found `A { a: a, b: 0, c: _, .. }`
  --> $DIR/trace_faulty_macros.rs:16:9
   |
LL |         $a
   |         ^^ expected expression
...
LL |     let a = pat_macro!();
   |             ------------ in this macro invocation
   |
   = note: this error originates in the macro `pat_macro` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0774]: `derive` may only be applied to `struct`s, `enum`s and `union`s
  --> $DIR/trace_faulty_macros.rs:42:1
   |
LL | #[derive(Debug)]
   | ^^^^^^^^^^^^^^^^ not applicable here
LL | fn use_derive_macro_as_attr() {}
   | -------------------------------- not a `struct`, `enum` or `union`

note: trace_macro
  --> $DIR/trace_faulty_macros.rs:36:13
   |
LL |     let a = pat_macro!();
   |             ^^^^^^^^^^^^
   |
   = note: expanding `pat_macro! {  }`
   = note: to `pat_macro! (A { a : a, b : 0, c : _, .. }) ;`
   = note: expanding `pat_macro! { A { a : a, b : 0, c : _, .. } }`
   = note: to `A { a: a, b: 0, c: _, .. }`

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0774`.