docs/test: add UI test and long-form error docs for `E0519`

2 files changed, 17 insertions, 0 deletions

diff --git a/src/test/ui/error-codes/E0519.rs b/src/test/ui/error-codes/E0519.rs
new file mode 100644
index 00000000000..269ffd6320d
--- /dev/null
+++ b/src/test/ui/error-codes/E0519.rs
@@ -0,0 +1,8 @@
+// no need to create a new aux file, we can use an existing.
+// aux-build: crateresolve1-1.rs
+
+// set same metadata as `crateresolve1`
+#![crate_name = "crateresolve1"]
+#![crate_type = "lib"]
+
+extern crate crateresolve1; //~ ERROR E0519
diff --git a/src/test/ui/error-codes/E0519.stderr b/src/test/ui/error-codes/E0519.stderr
new file mode 100644
index 00000000000..e24fc4aaa70
--- /dev/null
+++ b/src/test/ui/error-codes/E0519.stderr
@@ -0,0 +1,9 @@
+error[E0519]: the current crate is indistinguishable from one of its dependencies: it has the same crate-name `crateresolve1` and was compiled with the same `-C metadata` arguments. This will result in symbol conflicts between the two.
+  --> $DIR/E0519.rs:8:1
+   |
+LL | extern crate crateresolve1;
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0519`.