Assignments to non-inputs do not yield an error

[m1cm1c]

Steps to reproduce

1. Create an XJSnark program with the following code:

private uint_150 t0; 
private uint_150 t1; 
private uint_150 t2; 
private uint_150 t4; 
 
inputs { 
  t1, t2 
} 
outputs { 
  t4  
} 
witnesses_AssertRange { 
  << ... >>  
} 
witnesses { 
  << ... >>  
} 
 
 
public void outsource() { 
  uint_150 t3 = t1 + t2; 
  verifyEq ( t0 , t3 ); 
  t4 = t3; 
} 
 
SampleRun("Sample_Run1", true){ 
  pre { 
      t0.val = new BigInteger("7252435245245243524352435243535635463546356356354635424352345234"); 
      t1.val = new BigInteger("7252435245245243524352435243535635463546356356354635424352345233"); 
      t2.val = new BigInteger("1"); 
  } 
  post { 
      System.out.println(t4.val); 
  } 
}

2. Save the file.
3. Right-click the file and choose Run [...].

Problem

As you can see, t0 and t1 are identical except for the last digit where t0 is 1 larger than t1. So if you add t2 to t1, the result should be equal to t0. However, the assertion fails:

Error - Assertion Failed assert in 2 <1 0> out 1 <189> 		# Equality assertion of long elements | case 2 | index 0
Exception in thread "main" 0*1!=886742162
java.lang.RuntimeException: Error During Circuit Evaluation
	at backend.operations.primitive.AssertBasicOp.compute(AssertBasicOp.java:29)
	at backend.operations.primitive.BasicOp.evaluate(BasicOp.java:71)
	at backend.eval.CircuitEvaluator.evaluate(CircuitEvaluator.java:160)
	at backend.structure.CircuitGenerator.__evaluateSampleRun(CircuitGenerator.java:463)
	at xjsnark.rsa.RSAModExpFixedModulusVariableExponent.<init>(RSAModExpFixedModulusVariableExponent.java:25)
	at xjsnark.rsa.RSAModExpFixedModulusVariableExponent.main(RSAModExpFixedModulusVariableExponent.java:19)

The reason for this is that t0 was not declared as an input.

(The problem does not occur in the original RSAModExpFixedModulusVariableExponent file. I simply modified this file.)

Expected behavior

The compiler should tell the user that he trying to assign a value to something that is not an input.