[arrow-rs] branch master updated: Buffer::from_slice_ref set correct capacity (#18)

[jo...@apache.org]

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jorgecarleitao pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/arrow-rs.git


The following commit(s) were added to refs/heads/master by this push:
     new c3fe3ba  Buffer::from_slice_ref set correct capacity (#18)
c3fe3ba is described below

commit c3fe3bab9905739fdda75301dab07a18c91731bd
Author: Raphael Taylor-Davies <17...@users.noreply.github.com>
AuthorDate: Thu Apr 22 14:09:59 2021 +0100

    Buffer::from_slice_ref set correct capacity (#18)
    
    Fixed ARROW-12504
---
 arrow/src/buffer/immutable.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arrow/src/buffer/immutable.rs b/arrow/src/buffer/immutable.rs
index cd6a2a3..f4aeae9 100644
--- a/arrow/src/buffer/immutable.rs
+++ b/arrow/src/buffer/immutable.rs
@@ -55,8 +55,8 @@ impl Buffer {
     /// Initializes a [Buffer] from a slice of items.
     pub fn from_slice_ref<U: ArrowNativeType, T: AsRef<[U]>>(items: &T) -> Self {
         let slice = items.as_ref();
-        let len = slice.len();
-        let mut buffer = MutableBuffer::with_capacity(len);
+        let capacity = slice.len() * std::mem::size_of::<U>();
+        let mut buffer = MutableBuffer::with_capacity(capacity);
         buffer.extend_from_slice(slice);
         buffer.into()
     }