fix: log more potential bugs

src/preprocessor.ts

@@ -8,7 +8,7 @@ import {
   type Scope,
   type ScopeToIdentifiersToRemoveMap,
 } from "./types";
-import { isNotNull } from "./utils";
+import { assertNeverAndLog, isNotNull } from "./utils";
 
 /**
  * Walk the ast to gather all the infomation we need to process the code.
@@ -167,7 +167,10 @@ function createVisitor<State>(
         }
 
         default: {
-          assertNever(`Unexpected variable declarator "${element.type}"`); // Shouldn't happen... probably. Needs code example if it can.
+          // Shouldn't happen... probably. Needs code example if it can.
+          assertNeverAndLog(
+            `Unexpected variable declarator type "${element.type}"`,
+          );
         }
       }
     } while (stack.length > 0);

src/process.ts

@@ -18,6 +18,7 @@ import {
   type ReadonlyScopeToIdentifiersToRemoveMap,
   type Scope,
 } from "./types";
+import { assertNeverAndLog } from "./utils";
 
 /**
  * Processes the provided AST to remove assert statements and assertion imports.
@@ -199,15 +200,9 @@ function removeNodeSmart(
     }
   }
 
-  assertNever(`Potentially unsafe node removal - ${scope.node.type}`);
-
-  /* v8 ignore next 6 */
-  // @ts-expect-error Unreachable code.
-  console.error(
-    `Potentially unsafe node removal - ${scope.node.type}. Please report this issue.`,
-  );
-  // @ts-expect-error Unreachable code.
-  return void removeNode(code, removedNodes, scope.node);
+  /* v8 ignore next 2 */
+  removeNode(code, removedNodes, scope.node);
+  assertNeverAndLog(`Potentially unsafe node removal - ${scope.node.type}.`);
 }
 
 /**

src/utils.ts

@@ -1,3 +1,5 @@
+import { fail as assertNever } from "node:assert/strict";
+
 /**
  * Checks if the given element is not null.
  *
@@ -7,3 +9,15 @@
 export function isNotNull<T>(element: T | null): element is T {
   return element !== null;
 }
+
+/**
+ * Log the message and fail if not in production.
+ *
+ * @param message - The message to log.
+ */
+export function assertNeverAndLog(message: string): never {
+  console.error(
+    `Deassert: ${message}\nPlease report this issue at https://github.com/RebeccaStevens/deassert/issues`,
+  );
+  assertNever();
+}