Update rand to 0.7 (fixes #24448)

components/rand/Cargo.toml

@@ -13,7 +13,7 @@ path = "lib.rs"
 [dependencies]
 lazy_static = "1"
 log = "0.4"
-rand = "0.6"
-rand_core = "0.4"
-rand_isaac = "0.1"
-uuid = "0.7"
+rand = "0.7"
+rand_core = "0.5"
+rand_isaac = "0.2"
+uuid = "0.8"

components/rand/lib.rs

@@ -31,10 +31,7 @@ use uuid::{Builder, Uuid, Variant, Version};
 
 // The shared RNG which may hold on to a file descriptor
 lazy_static! {
-    static ref OS_RNG: Mutex<OsRng> = match OsRng::new() {
-        Ok(r) => Mutex::new(r),
-        Err(e) => panic!("Failed to seed OsRng: {}", e),
-    };
+    static ref OS_RNG: Mutex<OsRng> = Mutex::new(OsRng);
 }
 
 // Generate 32K of data between reseedings