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-rw-r--r--tests/ui/parser/fn-defined-using-def.rs10
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diff --git a/tests/ui/parser/fn-defined-using-def.rs b/tests/ui/parser/fn-defined-using-def.rs
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+++ b/tests/ui/parser/fn-defined-using-def.rs
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+// Check what happens when `def` is used to define a function, instead of `fn`
+// edition:2021
+
+#![allow(dead_code)]
+
+def foo() {}
+//~^ ERROR expected one of `!` or `::`, found `foo`
+//~^^ HELP write `fn` instead of `def` to declare a function
+
+fn main() {}