From 34a5cfb0840161b3d2593bf435cf9de5a6f545b1 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Mon, 16 Jul 2018 21:46:42 +0200
Subject: [PATCH] document new feature

---
 src/doc/src/reference/unstable.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/doc/src/reference/unstable.md b/src/doc/src/reference/unstable.md
index c3a29869a23..fe137b84201 100644
--- a/src/doc/src/reference/unstable.md
+++ b/src/doc/src/reference/unstable.md
@@ -308,3 +308,15 @@ $ cargo +nightly build -Z compile-progress
    Compiling utf8-ranges v1.0.0
     Building [=======>                                                  ] 2/14: libc, regex, uc...
 ```
+
+### default-run
+* Original issue: [#2200](https://github.com/rust-lang/cargo/issues/2200)
+
+The `default-run` option in the `[project]` section of the manifest can be used
+to specify a default binary picked by `cargo run`. For example, when there is
+both `src/bin/a.rs` and `src/bin/b.rs`:
+
+```toml
+[project]
+default-run = "a"
+```