librand: deny warnings in doctests

Author: Ryman

mk/tests.mk

@@ -26,7 +26,7 @@ TEST_TARGET_CRATES = $(filter-out core rustc_unicode alloc_system \
 		     		  alloc_jemalloc,$(TARGET_CRATES)) \
 			collectionstest coretest
 TEST_DOC_CRATES = $(DOC_CRATES) arena flate fmt_macros getopts graphviz \
-                log
+                log rand
 TEST_HOST_CRATES = $(filter-out rustc_typeck rustc_borrowck rustc_resolve \
 		   		rustc_trans rustc_lint,\
                      $(HOST_CRATES))

src/librand/lib.rs

@@ -23,7 +23,8 @@
 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk.png",
        html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
        html_root_url = "https://doc.rust-lang.org/nightly/",
-       html_playground_url = "https://play.rust-lang.org/")]
+       html_playground_url = "https://play.rust-lang.org/",
+       test(attr(deny(warnings))))]
 #![no_std]
 #![staged_api]
 #![unstable(feature = "rand",