filling-drop: switch DTOR_NEEDED and DTOR_DONE to non-trivial values.

Author: pnkfelix

src/libcore/mem.rs

@@ -334,7 +334,7 @@ macro_rules! repeat_u8_as_u64 {
 // But having the sign bit set is a pain, so 0x1d is probably better.
 //
 // And of course, 0x00 brings back the old world of zero'ing on drop.
-#[cfg(not(stage0))] pub const POST_DROP_U8: u8 = 0x0;
+#[cfg(not(stage0))] pub const POST_DROP_U8: u8 = 0x1d;
 #[cfg(not(stage0))] pub const POST_DROP_U32: u32 = repeat_u8_as_u32!(POST_DROP_U8);
 #[cfg(not(stage0))] pub const POST_DROP_U64: u64 = repeat_u8_as_u64!(POST_DROP_U8);
 

src/librustc_trans/trans/adt.rs

@@ -166,7 +166,7 @@ macro_rules! repeat_u8_as_u64 {
                        (repeat_u8_as_u32!($name) as u64)) }
 }
 
-pub const DTOR_NEEDED: u8 = 0x1;
+pub const DTOR_NEEDED: u8 = 0xd4;
 pub const DTOR_NEEDED_U32: u32 = repeat_u8_as_u32!(DTOR_NEEDED);
 pub const DTOR_NEEDED_U64: u64 = repeat_u8_as_u64!(DTOR_NEEDED);
 #[allow(dead_code)]
@@ -178,7 +178,7 @@ pub fn dtor_needed_usize(ccx: &CrateContext) -> usize {
     }
 }
 
-pub const DTOR_DONE: u8 = 0x0;
+pub const DTOR_DONE: u8 = 0x1d;
 pub const DTOR_DONE_U32: u32 = repeat_u8_as_u32!(DTOR_DONE);
 pub const DTOR_DONE_U64: u64 = repeat_u8_as_u64!(DTOR_DONE);
 #[allow(dead_code)]