Update RSPEC

rules/S6466/rust/metadata.json

@@ -1,2 +1,6 @@
 {
-}
+  "tags": [
+    "clippy",
+    "out_of_bounds_indexing"
+  ]
+}

rules/S6466/rust/rule.adoc

@@ -1,44 +1,37 @@
-FIXME: add a description
-
-// If you want to factorize the description uncomment the following line and create the file.
-//include::../description.adoc[]
-
 == Why is this an issue?
 
-FIXME: remove the unused optional headers (that are commented out)
+An array index out-of-bounds panic is a bug class that occurs in Rust when a
+program tries to access an array element that does not exist.
+This bug can cause your program to crash or behave unexpectedly.
 
-//=== What is the potential impact?
+include::../impact.adoc[]
 
 == How to fix it
-//== How to fix it in FRAMEWORK NAME
+
+To fix an array index out of bounds panic in Rust, you should always ensure
+that you are accessing array elements within the bounds of the array.
 
 === Code examples
 
 ==== Noncompliant code example
 
 [source,rust,diff-id=1,diff-type=noncompliant]
 ----
-FIXME
+let x = [1, 2, 3, 4];
+
+x[9]; // Out of bounds indexing
 ----
 
 ==== Compliant solution
 
 [source,rust,diff-id=1,diff-type=compliant]
 ----
-FIXME
-----
-
-//=== How does this work?
+let x = [1, 2, 3, 4];
 
-//=== Pitfalls
-
-//=== Going the extra mile
+x[0];
+----
 
+== Resources
+=== Documentation
 
-//== Resources
-//=== Documentation
-//=== Articles & blog posts
-//=== Conference presentations
-//=== Standards
-//=== External coding guidelines
-//=== Benchmarks
+* Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html#out_of_bounds_indexing