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Allocate correctly for tree hash

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Paul Hauner 2019-04-17 14:00:00 +10:00
parent c3779caede
commit bf1a93f444
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GPG Key ID: D362883A9218FCC6
1 changed files with 2 additions and 1 deletions
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3
eth2/utils/tree_hash_derive/src/lib.rs
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@ -166,11 +166,12 @@ pub fn tree_hash_signed_root_derive(input: TokenStream) -> TokenStream {
};
let idents = get_signed_root_named_field_idents(&struct_data);
let num_elems = idents.len();
let output = quote! {
impl tree_hash::SignedRoot for #name {
fn signed_root(&self) -> Vec<u8> {
let mut leaves = Vec::with_capacity(4 * tree_hash::HASHSIZE);
let mut leaves = Vec::with_capacity(#num_elems * tree_hash::HASHSIZE);
#(
leaves.append(&mut self.#idents.tree_hash_root());