error[E0425]: cannot find value `a` in this scope
  --> $DIR/expr_before_ident_pat.rs:10:12
   |
LL |     funny!(a, a);
   |            ^ not found in this scope

error: arbitrary expressions aren't allowed in patterns
  --> $DIR/expr_before_ident_pat.rs:10:12
   |
LL |     funny!(a, a);
   |            ^
   |
   = note: the `expr` fragment specifier forces the metavariable's content to be an expression

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0425`.