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diff --git a/compiler/rustc_error_codes/src/error_codes/E0712.md b/compiler/rustc_error_codes/src/error_codes/E0712.md
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+++ b/compiler/rustc_error_codes/src/error_codes/E0712.md
@@ -0,0 +1,19 @@
+A borrow of a thread-local variable was made inside a function which outlived
+the lifetime of the function.
+
+Erroneous code example:
+
+```compile_fail,E0712
+#![feature(thread_local)]
+
+#[thread_local]
+static FOO: u8 = 3;
+
+fn main() {
+    let a = &FOO; // error: thread-local variable borrowed past end of function
+
+    std::thread::spawn(move || {
+        println!("{}", a);
+    });
+}
+```