Fix warnings in release build

Author: Shaikh-Ubaid

src/lpython/parser/parser.cpp

@@ -117,7 +117,7 @@ Result<LPython::AST::ast_t*> parse_python_file(Allocator &al,
         const std::string &infile,
         diag::Diagnostics &diagnostics,
         uint32_t prev_loc,
-        bool new_parser) {
+        [[maybe_unused]] bool new_parser) {
     LPython::AST::ast_t* ast;
     // We will be using the new parser from now on
     new_parser = true;

src/lpython/semantics/python_ast_to_asr.cpp

@@ -1009,7 +1009,7 @@ class CommonVisitor : public AST::BaseVisitor<Struct> {
 
     ASR::ttype_t* get_type_from_var_annotation(std::string var_annotation,
         const Location& loc, Vec<ASR::dimension_t>& dims,
-        AST::expr_t** m_args=nullptr, size_t n_args=0,
+        AST::expr_t** m_args=nullptr, [[maybe_unused]] size_t n_args=0,
         bool raise_error=true, ASR::abiType abi=ASR::abiType::Source,
         bool is_argument=false) {
         ASR::ttype_t* type = nullptr;
@@ -2416,7 +2416,7 @@ class CommonVisitor : public AST::BaseVisitor<Struct> {
                         result = left_value >> right_value;
                         break;
                     }
-                    default: { LCOMPILERS_ASSERT(false); } // should never happen
+                    default: { throw SemanticError("ICE: Unknown binary operator", loc); } // should never happen
                 }
                 value = ASR::down_cast<ASR::expr_t>(ASR::make_UnsignedIntegerConstant_t(
                     al, loc, result, dest_type));
@@ -2458,7 +2458,7 @@ class CommonVisitor : public AST::BaseVisitor<Struct> {
                     case (ASR::binopType::Mul): { result = left_value * right_value; break; }
                     case (ASR::binopType::Div): { result = left_value / right_value; break; }
                     case (ASR::binopType::Pow): { result = std::pow(left_value, right_value); break; }
-                    default: { LCOMPILERS_ASSERT(false); }
+                    default: { throw SemanticError("ICE: Unknown binary operator", loc); }
                 }
                 value = ASR::down_cast<ASR::expr_t>(ASR::make_RealConstant_t(
                     al, loc, result, dest_type));
@@ -3289,7 +3289,7 @@ class CommonVisitor : public AST::BaseVisitor<Struct> {
     void visit_NamedExpr(const AST::NamedExpr_t &x) {
         this->visit_expr(*x.m_target);
         ASR::expr_t *target = ASRUtils::EXPR(tmp);
-        ASR::ttype_t *target_type = ASRUtils::expr_type(target);
+        [[maybe_unused]] ASR::ttype_t *target_type = ASRUtils::expr_type(target);
         this->visit_expr(*x.m_value);
         ASR::expr_t *value = ASRUtils::EXPR(tmp);
         ASR::ttype_t *value_type = ASRUtils::expr_type(value);