Update Panic documentation and #[track_caller]

This is stuff I missed in #1442

Signed-off-by: Joe Richey <[email protected]>

Author: josephlr

rand_core/src/le.rs

@@ -12,7 +12,12 @@
 //! useful functions available.
 
 /// Reads unsigned 32 bit integers from `src` into `dst`.
+///
+/// # Panics
+///
+/// If `dst` has insufficent space (`4*dst.len() < src.len()`).
 #[inline]
+#[track_caller]
 pub fn read_u32_into(src: &[u8], dst: &mut [u32]) {
     assert!(src.len() >= 4 * dst.len());
     for (out, chunk) in dst.iter_mut().zip(src.chunks_exact(4)) {
@@ -21,7 +26,12 @@ pub fn read_u32_into(src: &[u8], dst: &mut [u32]) {
 }
 
 /// Reads unsigned 64 bit integers from `src` into `dst`.
+///
+/// # Panics
+///
+/// If `dst` has insufficent space (`8*dst.len() < src.len()`).
 #[inline]
+#[track_caller]
 pub fn read_u64_into(src: &[u8], dst: &mut [u64]) {
     assert!(src.len() >= 8 * dst.len());
     for (out, chunk) in dst.iter_mut().zip(src.chunks_exact(8)) {

rand_core/src/lib.rs

@@ -385,7 +385,6 @@ pub trait SeedableRng: Sized {
     /// [`getrandom`]: https://docs.rs/getrandom
     #[cfg(feature = "getrandom")]
     #[cfg_attr(doc_cfg, doc(cfg(feature = "getrandom")))]
-    #[track_caller]
     fn from_entropy() -> Self {
         let mut seed = Self::Seed::default();
         if let Err(err) = getrandom::getrandom(seed.as_mut()) {

rand_distr/src/weighted_tree.rs

@@ -290,6 +290,7 @@ impl<W: Clone + PartialEq + PartialOrd + SampleUniform + SubAssign<W> + Weight>
 impl<W: Clone + PartialEq + PartialOrd + SampleUniform + SubAssign<W> + Weight> Distribution<usize>
     for WeightedTreeIndex<W>
 {
+    #[track_caller]
     fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> usize {
         self.try_sample(rng).unwrap()
     }

src/seq/index.rs

@@ -219,6 +219,7 @@ impl ExactSizeIterator for IndexVecIntoIter {}
 /// to adapt the internal `sample_floyd` implementation.
 ///
 /// Panics if `amount > length`.
+#[track_caller]
 pub fn sample<R>(rng: &mut R, length: usize, amount: usize) -> IndexVec
 where R: Rng + ?Sized {
     if amount > length {