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Fix tree hash bug

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This commit is contained in:
Paul Hauner
2019-04-22 16:58:40 +10:00
parent 7c64a5a21b
commit 2f69185ccb
2 changed files with 13 additions and 3 deletions
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12
eth2/utils/tree_hash/src/cached_tree_hash/resize.rs
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@@ -1,4 +1,5 @@
use super::*;
use std::cmp::min;
/// New vec is bigger than old vec.
pub fn grow_merkle_cache(
@@ -100,8 +101,15 @@ pub fn shrink_merkle_cache(
)
};
to_byte_slice.copy_from_slice(from_byte_slice.get(0..to_byte_slice.len())?);
to_flag_slice.copy_from_slice(from_flag_slice.get(0..to_flag_slice.len())?);
let num_bytes = min(from_byte_slice.len(), to_byte_slice.len());
let num_flags = min(from_flag_slice.len(), to_flag_slice.len());
to_byte_slice
.get_mut(0..num_bytes)?
.copy_from_slice(from_byte_slice.get(0..num_bytes)?);
to_flag_slice
.get_mut(0..num_flags)?
.copy_from_slice(from_flag_slice.get(0..num_flags)?);
}
Some((bytes, flags))