diff --git a/build.sh b/build.sh
index 40166f4..95fe2a2 100755
--- a/build.sh
+++ b/build.sh
@@ -32,9 +32,9 @@ fi
 mkdir tmp
 cp -r pkg/ytbn_graphing_software_bg.wasm tmp/
 
-# sed -i 's/fatal: true/fatal: false/g' pkg/ytbn_graphing_software.js
+sed -i 's/fatal: true/fatal: false/g' pkg/ytbn_graphing_software.js
 
-# sed -i "s/TextEncoder('utf-8')/TextEncoder('utf-8', { ignoreBOM: true, fatal: false })/g" pkg/ytbn_graphing_software.js
+sed -i "s/TextEncoder('utf-8')/TextEncoder('utf-8', { ignoreBOM: true, fatal: false })/g" pkg/ytbn_graphing_software.js
 
 minify pkg/ytbn_graphing_software.js > tmp/ytbn_graphing_software.js
 
diff --git a/src/lib.rs b/src/lib.rs
index bf5c700..2ec9039 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -9,7 +9,7 @@
 #![feature(const_assume)]
 #![feature(const_option_ext)]
 #![feature(const_slice_index)]
-#![feature(split_array)]
+#![feature(slice_split_at_unchecked)]
 
 #[macro_use]
 extern crate static_assertions;
diff --git a/src/main.rs b/src/main.rs
index 9e13e88..d8da563 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -9,7 +9,7 @@
 #![feature(const_assume)]
 #![feature(const_option_ext)]
 #![feature(const_slice_index)]
-#![feature(split_array)]
+#![feature(slice_split_at_unchecked)]
 
 #[macro_use]
 extern crate static_assertions;
diff --git a/src/misc.rs b/src/misc.rs
index 3d2695a..a4216d5 100644
--- a/src/misc.rs
+++ b/src/misc.rs
@@ -309,9 +309,10 @@ pub fn almost_variable(x: f64) -> Option<char> {
 }
 
 pub const HASH_LENGTH: usize = 8;
+type CommitBits = [u8; HASH_LENGTH];
 
 #[allow(dead_code)]
-pub fn hashed_storage_create(hash: [u8; HASH_LENGTH], data: &[u8]) -> String {
+pub fn hashed_storage_create(hash: CommitBits, data: &[u8]) -> String {
 	// cannot use `from_utf8` seems to break on wasm. no clue why
 	[&hash, data]
 		.concat()
@@ -321,15 +322,24 @@ pub fn hashed_storage_create(hash: [u8; HASH_LENGTH], data: &[u8]) -> String {
 }
 
 #[allow(dead_code)]
-pub fn hashed_storage_read(data: String) -> Option<([u8; HASH_LENGTH], Vec<u8>)> {
+pub fn hashed_storage_read(data: String) -> Option<(CommitBits, Vec<u8>)> {
 	if HASH_LENGTH >= data.len() {
 		return None;
 	}
 
+	unsafe {
+		assume(!data.is_empty());
+		assume(data.len() > HASH_LENGTH);
+	}
+
 	// can't use data.as_bytes() here for some reason, seems to break on wasm?
 	let decoded_1 = data.chars().map(|c| c as u8).collect::<Vec<u8>>();
 
-	let (hash, cached_data) = decoded_1.split_array_ref::<HASH_LENGTH>();
+	let (hash, cached_data) = {
+		let (a, b) = unsafe { decoded_1.split_at_unchecked(HASH_LENGTH) };
+		unsafe { (&*(a.as_ptr() as *const CommitBits), b) }
+	};
+
 	debug_assert!(!cached_data.is_empty());
 
 	Some((*hash, cached_data.to_vec()))