repl: fix prepareStackTrace frames array order

The second parameter of `Error.prepareStackTrace` is an array of
reversed call site frames.

lib/repl.js

@@ -45,20 +45,18 @@
 const {
   ArrayPrototypeAt,
   ArrayPrototypeFilter,
-  ArrayPrototypeFindIndex,
+  ArrayPrototypeFindLastIndex,
   ArrayPrototypeForEach,
   ArrayPrototypeIncludes,
   ArrayPrototypeJoin,
   ArrayPrototypeMap,
   ArrayPrototypePop,
   ArrayPrototypePush,
   ArrayPrototypePushApply,
-  ArrayPrototypeReverse,
   ArrayPrototypeShift,
   ArrayPrototypeSlice,
   ArrayPrototypeSome,
   ArrayPrototypeSort,
-  ArrayPrototypeSplice,
   ArrayPrototypeUnshift,
   Boolean,
   Error,
@@ -153,6 +151,7 @@ const {
   },
   isErrorStackTraceLimitWritable,
   overrideStackTrace,
+  getInternalPrepareStackTrace,
 } = require('internal/errors');
 const { sendInspectorCommand } = require('internal/util/inspector');
 const { getOptionValue } = require('internal/options');
@@ -679,23 +678,19 @@ function REPLServer(prompt,
         if (typeof stackFrames === 'object') {
           // Search from the bottom of the call stack to
           // find the first frame with a null function name
-          const idx = ArrayPrototypeFindIndex(
-            ArrayPrototypeReverse(stackFrames),
+          const idx = ArrayPrototypeFindLastIndex(
+            stackFrames,
             (frame) => frame.getFunctionName() === null,
           );
           // If found, get rid of it and everything below it
-          frames = ArrayPrototypeSplice(stackFrames, idx + 1);
+          frames = ArrayPrototypeSlice(stackFrames, 0, idx);
         } else {
           frames = stackFrames;
         }
-        // FIXME(devsnek): this is inconsistent with the checks
-        // that the real prepareStackTrace dispatch uses in
-        // lib/internal/errors.js.
         if (typeof Error.prepareStackTrace === 'function') {
           return Error.prepareStackTrace(error, frames);
         }
-        ArrayPrototypePush(frames, error);
-        return ArrayPrototypeJoin(ArrayPrototypeReverse(frames), '\n    at ');
+        return getInternalPrepareStackTrace()(error, frames);
       });
       decorateErrorStack(e);
 

test/parallel/test-repl-pretty-custom-stack.js

@@ -42,8 +42,9 @@ const origPrepareStackTrace = Error.prepareStackTrace;
 Error.prepareStackTrace = (err, stack) => {
   if (err instanceof SyntaxError)
     return err.toString();
-  stack.push(err);
-  return stack.reverse().join('--->\n');
+  // Insert the error at the beginning of the stack
+  stack.unshift(err);
+  return stack.join('--->\n');
 };
 
 process.on('uncaughtException', (e) => {