fix: Set location before cast instructions in SSA (#2202)

Fix compiler panic before cast

crates/noirc_evaluator/src/errors.rs

@@ -22,7 +22,7 @@ pub enum RuntimeError {
     InternalError(#[from] InternalError),
     #[error("Index out of bounds, array has size {index:?}, but index was {array_size:?}")]
     IndexOutOfBounds { index: usize, array_size: usize, location: Option<Location> },
-    #[error("All Witnesses are by default u{num_bits:?} Applying this type does not apply any constraints.\n We also currently do not allow integers of size more than {num_bits:?}, this will be handled by BigIntegers.")]
+    #[error("Range constraint of {num_bits} bits is too large for the Field size")]
     InvalidRangeConstraint { num_bits: u32, location: Option<Location> },
     #[error("Expected array index to fit into a u64")]
     TypeConversion { from: String, into: String, location: Option<Location> },

crates/noirc_evaluator/src/ssa/ssa_gen/mod.rs

@@ -268,6 +268,7 @@ impl<'a> FunctionContext<'a> {
     fn codegen_cast(&mut self, cast: &ast::Cast) -> Values {
         let lhs = self.codegen_non_tuple_expression(&cast.lhs);
         let typ = Self::convert_non_tuple_type(&cast.r#type);
+        self.builder.set_location(cast.location);
         self.builder.insert_cast(lhs, typ).into()
     }
 

crates/noirc_frontend/src/monomorphization/ast.rs

@@ -120,6 +120,7 @@ pub struct If {
 pub struct Cast {
     pub lhs: Box<Expression>,
     pub r#type: Type,
+    pub location: Location,
 }
 
 #[derive(Debug, Clone)]

crates/noirc_frontend/src/monomorphization/mod.rs

@@ -319,6 +319,7 @@ impl<'interner> Monomorphizer<'interner> {
             HirExpression::Cast(cast) => ast::Expression::Cast(ast::Cast {
                 lhs: Box::new(self.expr(cast.lhs)),
                 r#type: Self::convert_type(&cast.r#type),
+                location: self.interner.expr_location(&expr),
             }),
 
             HirExpression::For(for_expr) => {