Fix error

src/asmgen/mod.rs

@@ -2,7 +2,7 @@ use crate::asm;
 use crate::ir;
 use crate::Translate;
 
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct Asmgen {}
 
 impl Translate<ir::TranslationUnit> for Asmgen {

src/irgen/mod.rs

@@ -4,7 +4,7 @@ use lang_c::ast::*;
 
 use crate::*;
 
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct Irgen {}
 
 #[derive(Debug, PartialEq)]

src/opt/deadcode.rs

@@ -4,7 +4,7 @@ use crate::*;
 
 pub type Deadcode = FunctionPass<Repeat<DeadcodeInner>>;
 
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct DeadcodeInner {}
 
 impl Optimize<FunctionDefinition> for DeadcodeInner {

src/opt/gvn.rs

@@ -3,7 +3,7 @@ use crate::*;
 
 pub type Gvn = FunctionPass<GvnInner>;
 
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct GvnInner {}
 
 impl Optimize<ir::FunctionDefinition> for GvnInner {

src/opt/mem2reg.rs

@@ -4,7 +4,7 @@ use crate::*;
 
 pub type Mem2reg = FunctionPass<Mem2regInner>;
 
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct Mem2regInner {}
 
 impl Optimize<FunctionDefinition> for Mem2regInner {

src/opt/simplify_cfg.rs

@@ -10,19 +10,19 @@ pub type SimplifyCfg = FunctionPass<
 >;
 
 /// Simplifies block exits by propagating constants.
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct SimplifyCfgConstProp {}
 
 /// Retains only those blocks that are reachable from the init.
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct SimplifyCfgReach {}
 
 /// Merges two blocks if a block is pointed to only by another
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct SimplifyCfgMerge {}
 
 /// Removes empty blocks
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct SimplifyCfgEmpty {}
 
 impl Optimize<FunctionDefinition> for SimplifyCfgConstProp {