Bad state: Future already completed

Bad state: Future already completed
0 _AsyncCompleter.complete (dart:async/future_impl.dart:35:31)
#1 _decodeImage. (package:flutter_cache_manager/src/cache_managers/image_cache_manager.dart:161:15)
#2 ImageStreamCompleter.setImage (package:flutter/src/painting/image_stream.dart:655:25)
#3 MultiFrameImageStreamCompleter._emitFrame (package:flutter/src/painting/image_stream.dart:998:5)
#4 MultiFrameImageStreamCompleter._handleAppFrame (package:flutter/src/painting/image_stream.dart:922:7)
#5 MultiFrameImageStreamCompleter._handleAppFrame (package:flutter/src/painting/image_stream.dart:915:3)
#6 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1289:15)
#7 SchedulerBinding.handleBeginFrame. (package:flutter/src/scheduler/binding.dart:1140:11)
#8 _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:625:13)
#9 SchedulerBinding.handleBeginFrame (package:flutter/src/scheduler/binding.dart:1138:17)
#10 SchedulerBinding._handleBeginFrame (package:flutter/src/scheduler/binding.dart:1055:5)
#11 SchedulerBinding._handleBeginFrame (package:flutter/src/scheduler/binding.dart:1046:3)
#12 _rootRunUnary (dart:async/zone.dart:1414:13)
#13 _rootRunUnary (dart:async/zone.dart:1404:1)
#14 _CustomZone.runUnary (dart:async/zone.dart:1307:19)
#15 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1216:7)
#16 _invoke1 (dart:ui/hooks.dart:166:10)
#17 PlatformDispatcher._beginFrame (dart:ui/platform_dispatcher.dart:316:5)
#18 _beginFrame (dart:ui/hooks.dart:101:31)
#19 _beginFrame (dart:ui/hooks.dart:99:1)

Start at package:flutter_cache_manager/src/cache_managers/image_cache_manager.dart:161 and trace the _decodeImage callback through Flutter's ImageStreamCompleter.setImage. Reproduce the image-loading failure if possible and determine when the same Future is completed more than once. Done means the reported stack trace no longer occurs during image decoding, with the affected behavior covered by an appropriate test if one exists.

Written by the indexing model from the issue text.