Update lz4_flex version

Cargo.lock

@@ -1110,9 +1110,9 @@ dependencies = [
 
 [[package]]
 name = "lz4_flex"
-version = "0.4.1"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e7bea5a3a7bb3c040adc89eadadee33c3d39371b20dd980c952dd2642867b99"
+checksum = "50e76831e3b044ebf7008b17d6083e4dda6d8a9f6839387d7a81fad549417f57"
 dependencies = [
  "byteorder",
  "quick-error",

bytecode/Cargo.toml

@@ -11,7 +11,7 @@ license = "MIT"
 [dependencies]
 bincode =  "1.1"
 bitflags = "1.1"
-lz4_flex = "0.4"
+lz4_flex = "0.5"
 num-bigint = { version = "0.3", features = ["serde"] }
 num-complex = { version = "0.3", features = ["serde"] }
 serde = { version = "1.0", features = ["derive"] }

bytecode/src/bytecode.rs

@@ -732,12 +732,6 @@ impl<C: Constant> CodeObject<C> {
 impl CodeObject<ConstantData> {
     /// Load a code object from bytes
     pub fn from_bytes(data: &[u8]) -> Result<Self, Box<dyn std::error::Error>> {
-        // TODO: PR to lz4_flex to make it not panic
-        if data.len() < 4 {
-            return Err(
-                std::io::Error::new(std::io::ErrorKind::UnexpectedEof, "bad bytecode").into(),
-            );
-        }
         let raw_bincode = lz4_flex::decompress_size_prepended(data)?;
         let data = bincode::deserialize(&raw_bincode)?;
         Ok(data)