docs: Document that we need miri for testing

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/docs/build.rst b/docs/build.rst
index abba2fb6b418b81ba1f9810b62d5c64d54a19349..024a33bb7602696e4670f99739a96ab3fe9fac65 100644 (file)
--- a/docs/build.rst
+++ b/docs/build.rst
@@ -44,6 +44,7 @@ Setup
 
      rustup default nightly
      rustup target add wasm32-unknown-unknown
+     rustup component add miri # for the tests
 
    Unfortunately, it is possible that the Rust Nightly you find when
    you run this is missing some pieces, or is not compatible with the