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+Private modules cannot be publicly re-exported. This error indicates that you
+attempted to `pub use` a module that was not itself public.
+
+Erroneous code example:
+
+```compile_fail,E0365
+mod foo {
+    pub const X: u32 = 1;
+}
+
+pub use foo as foo2;
+
+fn main() {}
+```
+
+The solution to this problem is to ensure that the module that you are
+re-exporting is itself marked with `pub`:
+
+```
+pub mod foo {
+    pub const X: u32 = 1;
+}
+
+pub use foo as foo2;
+
+fn main() {}
+```
+
+See the [Use Declarations][use-declarations] section of the reference for
+more information on this topic.
+
+[use-declarations]: https://doc.rust-lang.org/reference/items/use-declarations.html