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#![crate_type = "lib"]
macro_rules! a { {} => }
//~^ ERROR: macro definition ended unexpectedly
macro_rules! b { 0 => }
//~^ ERROR: macro definition ended unexpectedly
//~| ERROR: invalid macro matcher
macro_rules! c { x => }
//~^ ERROR: macro definition ended unexpectedly
//~| ERROR: invalid macro matcher
macro_rules! d { _ => }
//~^ ERROR: macro definition ended unexpectedly
//~| ERROR: invalid macro matcher
macro_rules! e { {} }
//~^ ERROR: expected `=>`, found end of macro arguments
macro_rules! f {}
//~^ ERROR: macros must contain at least one rule
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