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+An intrinsic was declared without being a function.
+
+Erroneous code example:
+
+```compile_fail,E0622
+#![feature(intrinsics)]
+extern "rust-intrinsic" {
+    pub static breakpoint : fn(); // error: intrinsic must be a function
+}
+
+fn main() { unsafe { breakpoint(); } }
+```
+
+An intrinsic is a function available for use in a given programming language
+whose implementation is handled specially by the compiler. In order to fix this
+error, just declare a function. Example:
+
+```no_run
+#![feature(intrinsics)]
+extern "rust-intrinsic" {
+    pub fn breakpoint(); // ok!
+}
+
+fn main() { unsafe { breakpoint(); } }
+```