found a cause of a memory bug in emulator - fix is TODO (#6) - continued working on brainf interpreter. we really need better debugging tools tbh.

assembler/src/assembler/expand.rs

@@ -183,7 +183,7 @@ fn expand_stx(current: Node, nodes: &mut Vec<Node>) -> Result<(), AssembleError>
     let base = expect_type!(current.arg(0).unwrap(), Register)?;
     let dest = expect_type!(current.arg(1).unwrap(), Symbol)?;
     let offset = expect_type!(current.arg(2).unwrap(), Immediate)?;
-    let temp = Token::Register(Register::Rgf);
+    let temp = Token::Register(Register::Acc);
 
     nodes.extend(vec![
         node!(current.label(), Opcode::Lli, dest, temp),

assembler/src/assembler/model.rs

@@ -326,8 +326,8 @@ impl FromStr for Opcode {
             "include" => Ok(Self::Include),
             "call" => Ok(Self::Call),
             "return" => Ok(Self::Return),
-            "pusha" => Ok(Self::Push),
-            "popa" => Ok(Self::Pop),
+            "pusha" => Ok(Self::Pusha),
+            "popa" => Ok(Self::Popa),
             _ => Err(OpcodeFromStrError::InvalidRegister("unknown opcode")),
         }
     }