Update getrandom to 0.2.5

Test: cd external/rust/crates && atest --host -c
Change-Id: I1e16cc05e960f5b53d01f5d034f14ae10929f885

1 files changed, 8 insertions, 4 deletions

diff --git a/src/wasi.rs b/src/wasi.rs
index 4674f43..2d413e0 100644
--- a/src/wasi.rs
+++ b/src/wasi.rs
@@ -12,8 +12,12 @@ use core::num::NonZeroU32;
 use wasi::random_get;
 
 pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> {
-    unsafe { random_get(dest.as_mut_ptr(), dest.len()) }.map_err(|e: wasi::Error| {
-        // convert wasi's Error into getrandom's NonZeroU32 error
-        NonZeroU32::new(e.raw_error() as u32).unwrap().into()
-    })
+    unsafe {
+        random_get(dest.as_mut_ptr(), dest.len()).map_err(|e: wasi::Error| {
+            // convert wasi's Error into getrandom's NonZeroU32 error
+            // SAFETY: `wasi::Error` is `NonZeroU16` internally, so `e.raw_error()`
+            // will never return 0
+            NonZeroU32::new_unchecked(e.raw_error() as u32).into()
+        })
+    }
 }