implement Debug for all components of Context

src/arch/x86_64/mod.rs

@@ -7,6 +7,8 @@ use super::common::{push, rust_trampoline};
 
 pub const STACK_ALIGN: usize = 16;
 
+#[allow(raw_pointer_derive)]
+#[derive(Debug)]
 pub struct Registers {
   rsp: *mut usize
 }

src/context.rs

@@ -6,6 +6,7 @@ use arch::Registers;
 use stack;
 use debug::StackId;
 
+#[derive(Debug)]
 pub struct Context<'a, Stack: stack::Stack> {
   regs: Registers,
   _stack_id: StackId,

src/debug/mod.rs

@@ -5,6 +5,7 @@ use stack;
 
 mod valgrind;
 
+#[derive(Debug)]
 pub struct StackId(valgrind::stack_id_t);
 
 impl StackId {