diff --git a/tool/bin/compile_snippets.dart b/tool/bin/compile_snippets.dart
index 02b3cc5fc..478edd7e9 100644
--- a/tool/bin/compile_snippets.dart
+++ b/tool/bin/compile_snippets.dart
@@ -128,7 +128,6 @@ var _chapterTags = <String, List<String>>{
     "closure-op",
     "disassemble-closure",
     "interpret-closure",
-    "runtime-error-function",
     "interpret",
     "upvalue-struct",
     "resolve-upvalue-recurse",
@@ -275,18 +274,8 @@ var _chapterTags = <String, List<String>>{
   "Optimization": [
     "initial-index",
     "next-index",
-    "adjust-alloc",
-    "adjust-init",
-    "re-hash",
-    "adjust-free",
-    "table-set-grow",
-    "init-capacity-mask",
-    "add-all-loop",
     "find-string-index",
     "find-string-next",
-    "mark-table",
-    "remove-white",
-    "free-table",
     "define-nan-boxing",
     "end-values-equal",
   ],
diff --git a/util/c.make b/util/c.make
index 4a49d7b5c..08767068a 100644
--- a/util/c.make
+++ b/util/c.make
@@ -20,6 +20,7 @@ CFLAGS += -Wall -Wextra -Werror -Wno-unused-parameter
 # are functions that aren't used yet.
 ifeq ($(SNIPPET),true)
 	CFLAGS += -Wno-unused-function
+	CFLAGS += -Wno-unused-but-set-variable
 endif
 
 # Mode configuration.