diff --git a/src/compiler/boot.dst b/src/compiler/boot.dst
index 550a1107..79b1c244 100644
--- a/src/compiler/boot.dst
+++ b/src/compiler/boot.dst
@@ -246,7 +246,7 @@ value."
             :let (tuple 'let verb (doone (+ i 2)))
             :when (tuple 'if verb (doone (+ i 2)))
             (error ("unexpected loop predicate: " verb)))
-          (switch 
+          (switch
             verb
             :range (do
                      (def [start end _inc] (ast.unwrap1 object))
@@ -293,7 +293,7 @@ value."
   (def $accum (gensym "accum"))
   (tuple 'do
          (tuple 'def $accum @[])
-         (tuple 'loop head 
+         (tuple 'loop head
            (tuple array.push $accum
                 (tuple.prepend body 'do)))
          $accum))
@@ -734,7 +734,7 @@ in the same manner, and so on. Useful for expressing pipelines of data."
  "Get the number of occurences of each value in a indexed structure."
  [ind]
  (def freqs @{})
- (loop 
+ (loop
    [x :in ind]
    (def n (get freqs x))
    (put freqs x (if n (+ 1 n) 1)))
@@ -1016,8 +1016,9 @@ onvalue."
    } :in st]
    (file.write stdout "  in")
    (when c (file.write stdout " cfunction"))
-   (when name (file.write stdout (string " " name)))
-   (when func (file.write stdout (string " " func)))
+   (if name
+     (file.write stdout (string " " name))
+     (when func (file.write stdout (string " " func))))
    (when pc (file.write stdout (string " (pc=" pc ")")))
    (when tail (file.write stdout " (tailcall)"))
    (file.write stdout "\n"))))
@@ -1060,7 +1061,7 @@ environment is needed, use run-context."
   (def last (get parts (- (length parts) 1)))
   (def normname (string.replace-all "." "/" path))
   (array.push
-    (map (fn [x] 
+    (map (fn [x]
              (def y (string.replace "??" last x))
              (string.replace "?" normname y))
          paths)
@@ -1104,7 +1105,7 @@ returned from compiling and running the file."
      (put cache path newenv)
      (put loading path true)
      (def f (find-mod path))
-     (if f 
+     (if f
        (do
          # Normal dst module
          (defn chunks [buf] (file.read f 1024 buf))
@@ -1115,7 +1116,7 @@ returned from compiling and running the file."
          (file.close f)
          (put loading path nil)
          newenv)
-       (do 
+       (do
          # Try native module
          (def n (find-native path))
          (if (not n)
diff --git a/src/compiler/compile.c b/src/compiler/compile.c
index c7f09657..a24c43d9 100644
--- a/src/compiler/compile.c
+++ b/src/compiler/compile.c
@@ -983,6 +983,7 @@ DstCompileResult dst_compile(Dst source, DstTable *env, int flags) {
 
     if (c.result.status == DST_COMPILE_OK) {
         DstFuncDef *def = dstc_pop_funcdef(&c);
+        def->name = dst_cstring("[thunk]");
         c.result.funcdef = def;
     }
 
diff --git a/src/compiler/stl.c b/src/compiler/stl.c
index 1eecb9f7..22ad97e4 100644
--- a/src/compiler/stl.c
+++ b/src/compiler/stl.c
@@ -60,6 +60,7 @@ static const DstReg cfuns[] = {
 
 /* Utility for inline assembly */
 static DstFunction *dst_quick_asm(
+        const char *name,
         int32_t arity,
         int varargs,
         int32_t slots,
@@ -71,6 +72,7 @@ static DstFunction *dst_quick_asm(
     def->slotcount = slots;
     def->bytecode = malloc(bytecode_size);
     def->bytecode_length = bytecode_size / sizeof(uint32_t);
+    def->name = dst_cstring(name);
     if (!def->bytecode) {
         DST_OUT_OF_MEMORY;
     }
@@ -105,11 +107,11 @@ DstTable *dst_stl_env(int flags) {
     /* Load main functions */
     dst_env_cfuns(env, cfuns);
 
-    dst_env_def(env, "debug", dst_wrap_function(dst_quick_asm(0, 0, 1, debug_asm, sizeof(debug_asm))));
-    dst_env_def(env, "error", dst_wrap_function(dst_quick_asm(1, 0, 1, error_asm, sizeof(error_asm))));
-    dst_env_def(env, "apply1", dst_wrap_function(dst_quick_asm(2, 0, 2, apply_asm, sizeof(apply_asm))));
-    dst_env_def(env, "yield", dst_wrap_function(dst_quick_asm(1, 0, 2, yield_asm, sizeof(yield_asm))));
-    dst_env_def(env, "resume", dst_wrap_function(dst_quick_asm(2, 0, 2, resume_asm, sizeof(resume_asm))));
+    dst_env_def(env, "debug", dst_wrap_function(dst_quick_asm("debug", 0, 0, 1, debug_asm, sizeof(debug_asm))));
+    dst_env_def(env, "error", dst_wrap_function(dst_quick_asm("error", 1, 0, 1, error_asm, sizeof(error_asm))));
+    dst_env_def(env, "apply1", dst_wrap_function(dst_quick_asm("apply1", 2, 0, 2, apply_asm, sizeof(apply_asm))));
+    dst_env_def(env, "yield", dst_wrap_function(dst_quick_asm("yield", 1, 0, 2, yield_asm, sizeof(yield_asm))));
+    dst_env_def(env, "resume", dst_wrap_function(dst_quick_asm("resume", 2, 0, 2, resume_asm, sizeof(resume_asm))));
 
     dst_env_def(env, "VERSION", dst_cstringv(DST_VERSION));