The command has indeed failed with message:
Ltac variable y depends on pattern variable name z which is not bound in current context.
Ltac f x y z :=
  symmetry in x, y; auto with z; auto; intros; clearbody x; generalize
   dependent z
The command has indeed failed with message:
In nested Ltac calls to "g1" and "refine (uconstr)", last call failed.
The term "I" has type "True" while it is expected to have type "False".
The command has indeed failed with message:
In nested Ltac calls to "f1 (constr)" and "refine (uconstr)", last call
failed.
The term "I" has type "True" while it is expected to have type "False".
The command has indeed failed with message:
In nested Ltac calls to "g2 (constr)", "g1" and "refine (uconstr)", last call
failed.
The term "I" has type "True" while it is expected to have type "False".
The command has indeed failed with message:
In nested Ltac calls to "f2", "f1 (constr)" and "refine (uconstr)", last call
failed.
The term "I" has type "True" while it is expected to have type "False".
The command has indeed failed with message:
In nested Ltac calls to "h" and "injection (destruction_arg)", last call
failed.
No primitive equality found.
The command has indeed failed with message:
In nested Ltac calls to "h" and "injection (destruction_arg)", last call
failed.
No primitive equality found.
Hx
nat
nat
0
0
Ltac foo :=
  let x := intros in
  let y := intros -> in
  let v := constr:(nil) in
  let w := () in
  let z := 1 in
  pose v