From 825100c6d65f73e59b64d596a1eeb652d36da49a Mon Sep 17 00:00:00 2001
From: merkrafter <merkrafter@gmail.com>
Date: Sun, 7 Nov 2021 22:19:08 +0100
Subject: [PATCH] Deny 'block' as unit for --block-size

---
 src/bin/hexyl.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/bin/hexyl.rs b/src/bin/hexyl.rs
index 182457a..da4f324 100644
--- a/src/bin/hexyl.rs
+++ b/src/bin/hexyl.rs
@@ -148,6 +148,11 @@ fn run() -> Result<(), AnyhowError> {
         .value_of("block_size")
         .map(|bs| {
             let (num, unit) = extract_num_and_unit_from(bs)?;
+            if let Unit::Block { custom_size: _ } = unit {
+                return Err(anyhow!(
+                    "can not use 'block(s)' as a unit to specify block size"
+                ));
+            };
             num.checked_mul(unit.get_multiplier())
                 .ok_or_else(|| anyhow!(ByteOffsetParseError::UnitMultiplicationOverflow))
                 .and_then(|x| {