Method [customInspectSymbol]

lib/internal/debugger/inspect_repl.js:544–561

()

  class Backtrace extends Array {
    [customInspectSymbol]() {
      return ArrayPrototypeJoin(
        ArrayPrototypeMap(this, (callFrame, idx) => {
          const {
            location: { scriptId, lineNumber, columnNumber },
            functionName,
          } = callFrame;
          const name = functionName || '(anonymous)';

          const script = knownScripts[scriptId];
          const relativeUrl =
          (script && getRelativePath(script.url)) || '<unknown>';
          const frameLocation =
          `${relativeUrl}:${lineNumber + 1}:${columnNumber}`;

          return `#${idx} ${name} ${frameLocation}`;
        }), '\n');
    }

    static from(callFrames) {
      return FunctionPrototypeCall(