[dart-misc] [dart-announce] Fair warning: Some Stream methods now return streams with the type parameter they are supposed to have.

['Lasse R.H. Nielsen' via Dart Announcements]

We have found some cases where stream methods declared as returning
Stream<T> was just returning Stream<dynamic>.
Those have been fixed in release 1.12:
https://github.com/dart-lang/sdk/commit/ac33dfe1946f2a36e3ec7863d8c1da113f3118cf

If you have code that optimistically assumes the returned value is actually
Stream<dynamic>, then this change may break that code.
The most likely case would be a cast like:
Stream<int> intStream = numberStream.where((x) => x is int);
(but not exactly like it, because "where" did not need to be changed).

/L
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Lasse R.H. Nielsen - ***@google.com
'Faith without judgement merely degrades the spirit divine'
Google Denmark ApS - Frederiksborggade 20B, 1 sal - 1360 KÞbenhavn K
- Denmark - CVR nr. 28 86 69 84
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[Kevin Moore]

FYI: you're more likely to see issues when running in checked mode.

On Wednesday, August 12, 2015 at 9:42:25 AM UTC+1, Lasse Reichstein Holst

Post by 'Lasse R.H. Nielsen' via Dart Announcements
We have found some cases where stream methods declared as returning
Stream<T> was just returning Stream<dynamic>.
https://github.com/dart-lang/sdk/commit/ac33dfe1946f2a36e3ec7863d8c1da113f3118cf
If you have code that optimistically assumes the returned value is actually
Stream<dynamic>, then this change may break that code.
Stream<int> intStream = numberStream.where((x) => x is int);
(but not exactly like it, because "where" did not need to be changed).
/L
--
'Faith without judgement merely degrades the spirit divine'
Google Denmark ApS - Frederiksborggade 20B, 1 sal - 1360 KÞbenhavn K
- Denmark - CVR nr. 28 86 69 84

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For more news and information, visit https://plus.google.com/+dartlang

To join the conversation, visit https://groups.google.com/a/dartlang.org/