Make sure unsupported/illegal instructions are caught

1 files changed, 1 insertions, 1 deletions

diff --git a/src/decode.rs b/src/decode.rs
index 409aedb..5e19ab9 100644
--- a/src/decode.rs
+++ b/src/decode.rs
@@ -12,7 +12,7 @@ impl Instruction {
 
     /// Returns the opcode of the instruction, with the last 2 bits stripped away, as they are always 0b11 in a non-compressed instruction
     pub fn opcode_noncompressed(&self) -> u8 {
-        debug_assert_eq!(self.0 & 0b11, 0b11);
+        debug_assert_eq!(self.0 & 0b11, 0b11, "Compressed (or invalid) opcode");
         (self.0 >> 2 & 0x1f) as u8
     }