diff --git a/Rust/README.md b/Rust/README.md
index e198e69..ad578d0 100644
--- a/Rust/README.md
+++ b/Rust/README.md
@@ -3,10 +3,12 @@
 ## Commenting-Out
 
 - Confirmed working on rustc v1.53.0 (MacOS), but throws unused variable warning
+- Does not work since rustc v1.56.1 (Arch Linux) https://blog.rust-lang.org/2021/11/01/cve-2021-42574.html
 
 ## Stretched String
 
 - Confirmed working on rustc v1.53.0 (MacOS)
+- Does not work since rustc v1.56.1 (Arch Linux) https://blog.rust-lang.org/2021/11/01/cve-2021-42574.html
 
 ## Invisible Function
 
@@ -14,4 +16,4 @@
 
 ## Homoglyph Function
 
-- Confirmed working on rustc v1.53.0 (MacOS), but throws mixed_script_confusables warning
\ No newline at end of file
+- Confirmed working on rustc v1.53.0 (MacOS), but throws mixed_script_confusables warning