diff --git a/jbmc/src/java_bytecode/java_string_library_preprocess.cpp b/jbmc/src/java_bytecode/java_string_library_preprocess.cpp
index be406deb1c3..c5a7569d739 100644
--- a/jbmc/src/java_bytecode/java_string_library_preprocess.cpp
+++ b/jbmc/src/java_bytecode/java_string_library_preprocess.cpp
@@ -1300,7 +1300,8 @@ code_blockt java_string_library_preprocesst::make_copy_string_code(
 /// object.
 /// \param type: type of the function
 /// \param loc: location in the source
-/// \param function_id: unused
+/// \param function_id: name of the function (used for variable naming) where
+///   the generated code ends up.
 /// \param symbol_table: symbol table
 /// \return Code corresponding to:
 /// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -1314,14 +1315,11 @@ code_blockt java_string_library_preprocesst::make_copy_constructor_code(
   const irep_idt &function_id,
   symbol_table_baset &symbol_table)
 {
-  (void)function_id;
-
-  // Code for the output
-  code_blockt code;
+  code_blockt copy_constructor_body;
 
   // String expression that will hold the result
   const refined_string_exprt string_expr =
-    decl_string_expr(loc, function_id, symbol_table, code);
+    decl_string_expr(loc, function_id, symbol_table, copy_constructor_body);
 
   // Assign argument to a string_expr
   const java_method_typet::parameterst &params = type.parameters();
@@ -1329,16 +1327,16 @@ code_blockt java_string_library_preprocesst::make_copy_constructor_code(
   PRECONDITION(!params[1].get_identifier().empty());
   const symbol_exprt arg1{params[1].get_identifier(), params[1].type()};
   code_assign_java_string_to_string_expr(
-    string_expr, arg1, loc, symbol_table, code);
+    string_expr, arg1, loc, symbol_table, copy_constructor_body);
 
   // Assign string_expr to `this` object
   const symbol_exprt arg_this{params[0].get_identifier(), params[0].type()};
-  code.add(
+  copy_constructor_body.add(
     code_assign_string_expr_to_java_string(
       arg_this, string_expr, symbol_table, true),
     loc);
 
-  return code;
+  return copy_constructor_body;
 }
 
 /// Generates code for the String.length method
diff --git a/src/goto-programs/string_instrumentation.cpp b/src/goto-programs/string_instrumentation.cpp
index 5ad323737bc..f01c8732779 100644
--- a/src/goto-programs/string_instrumentation.cpp
+++ b/src/goto-programs/string_instrumentation.cpp
@@ -78,16 +78,16 @@ class string_instrumentationt:public messaget
   }
 
   void instrument(goto_programt &dest, goto_programt::targett it);
-  void do_function_call(goto_programt &dest, goto_programt::targett it);
+  void do_function_call(goto_programt &dest, goto_programt::targett target);
 
   // strings
   void do_sprintf(
     goto_programt &dest,
-    goto_programt::targett it,
+    goto_programt::targett target,
     const code_function_callt &);
   void do_snprintf(
     goto_programt &dest,
-    goto_programt::targett it,
+    goto_programt::targett target,
     const code_function_callt &);
   void do_strcat(
     goto_programt &dest,
@@ -99,19 +99,19 @@ class string_instrumentationt:public messaget
     const code_function_callt &);
   void do_strchr(
     goto_programt &dest,
-    goto_programt::targett it,
+    goto_programt::targett target,
     const code_function_callt &);
   void do_strrchr(
     goto_programt &dest,
-    goto_programt::targett it,
+    goto_programt::targett target,
     const code_function_callt &);
   void do_strstr(
     goto_programt &dest,
-    goto_programt::targett it,
+    goto_programt::targett target,
     const code_function_callt &);
   void do_strtok(
     goto_programt &dest,
-    goto_programt::targett it,
+    goto_programt::targett target,
     const code_function_callt &);
   void do_strerror(
     goto_programt &dest,
@@ -119,7 +119,7 @@ class string_instrumentationt:public messaget
     const code_function_callt &);
   void do_fscanf(
     goto_programt &dest,
-    goto_programt::targett it,
+    goto_programt::targett target,
     const code_function_callt &);
 
   void do_format_string_read(