How to solve: RangeError (end): Invalid value: Not in inclusive range 0..19: 20

Question

======== Exception caught by widgets library ======================================================= The following RangeError was thrown building: RangeError (end): Invalid value: Not in inclusive range 0..19: 20

When the exception was thrown, this was the stack: dart-sdk/lib/internal/js_dev_runtime/private/ddc_runtime/errors.dart 251:49 throw dart-sdk/lib/core/errors.dart 355:9 checkValidRange dart-sdk/lib/_internal/js_dev_runtime/private/js_string.dart 168:22 substring] packages/flutter_restaurant/view/screens/home/widget/category_view.dart 40:109 packages/flutter/src/widgets/sliver.dart 457:22 build packages/flutter/src/widgets/sliver.dart 1215:28 [_build] packages/flutter/src/widgets/sliver.dart 1228:55 packages/flutter/src/widgets/framework.dart 2600:19 buildScope packages/flutter/src/widgets/sliver.dart 1221:5 createChild packages/flutter/src/rendering/sliver_multi_box_adaptor.dart 349:23 packages/flutter/src/rendering/object.dart 1997:59 packages/flutter/src/rendering/object.dart 918:15 [_enableMutationsToDirtySubtrees] packages/flutter/src/rendering/object.dart 1997:7 invokeLayoutCallback packages/flutter/src/rendering/sliver_multi_box_adaptor.dart 338:5 [_createOrObtainChild] packages/flutter/src/rendering/sliver_multi_box_adaptor.dart 484:5 insertAndLayoutChild packages/flutter/src/rendering/sliver_list.dart 239:19 advance packages/flutter/src/rendering/sliver_list.dart 281:12 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/sliver_padding.dart 137:5 performLayout packages/flutter/src/rendering/sliver_padding.dart 371:11 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/viewport.dart 510:12 layoutChildSequence packages/flutter/src/rendering/viewport.dart 1580:12 [_attemptLayout] packages/flutter/src/rendering/viewport.dart 1489:20 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 277:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/layout_helper.dart 56:10 layoutChild packages/flutter/src/rendering/flex.dart 896:45 [_computeSizes] packages/flutter/src/rendering/flex.dart 931:32 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/layout_helper.dart 56:10 layoutChild packages/flutter/src/rendering/flex.dart 829:43 [_computeSizes] packages/flutter/src/rendering/flex.dart 931:32 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/layout_helper.dart 56:10 layoutChild packages/flutter/src/rendering/flex.dart 829:43 [_computeSizes] packages/flutter/src/rendering/flex.dart 931:32 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 277:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/layout_helper.dart 56:10 layoutChild packages/flutter/src/rendering/flex.dart 829:43 [_computeSizes] packages/flutter/src/rendering/flex.dart 931:32 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/shifted_box.dart 437:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/sliver.dart 1809:5 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/viewport.dart 510:12 layoutChildSequence packages/flutter/src/rendering/viewport.dart 1580:12 [_attemptLayout] packages/flutter/src/rendering/viewport.dart 1489:20 performLayout packages/flutter/src/rendering/object.dart 1731:7 [_layoutWithoutResize] packages/flutter/src/rendering/object.dart 887:17 flushLayout packages/flutter/src/rendering/binding.dart 497:19 drawFrame packages/flutter/src/widgets/binding.dart 883:13 drawFrame packages/flutter/src/rendering/binding.dart 363:5 [_handlePersistentFrameCallback] packages/flutter/src/scheduler/binding.dart 1144:15 [_invokeFrameCallback] packages/flutter/src/scheduler/binding.dart 1081:9 handleDrawFrame packages/flutter/src/scheduler/binding.dart 995:5 [_handleDrawFrame] lib/_engine/engine/platform_dispatcher.dart 1011:13 invoke lib/_engine/engine/platform_dispatcher.dart 159:5 invokeOnDrawFrame lib/_engine/engine/initialization.dart 128:45

RangeError (end): Invalid value: Not in inclusive range 0..19: 20