type 'NodeList' is not a subtype of type 'List<Element>' of 'directChildren' when debugging in IntelliJ

[MikeMitterer]

This line: https://goo.gl/UjFEkY produces the above error message but only while debugging this module in IntelliJ 15

It works in all other cases - Chromium/Dartium VM + dar2js Version

[alan-knight]

Are you running it in checked mode in any of the other cases? That message seems correct, in that NodeList is not a List < Element > , it implements List < Node > . And the return type of childNodes is List < Node > , so assigning it to List < Element > is not valid.

[iposva-google]

As @MikeMitterer said this properly works on Dartium/VM unless used by IntelliJ 15. Not sure what IntelliJ's debugger is doing in this case. Eric?

[mit-mit]

@clayberg can you comment on Ivan's question above?

[bwilkerson]

The error is occurring at run-time, not during analysis.

[jwren]

Which version of Dartium/ IntelliJ are you using? Will go look at the flags that we are passing in (not sure of even a flag that exists that enables such behavior.)

• Jaime

[MikeMitterer]

Im using
IntelliJ IDEA (Minerva) IU-143.870.1
Build #IU-143.870, built on November 18, 2015
JRE: 1.8.0_40-release-b92 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o

and Chromium Version 39.0.2171.0
Since dart 1.13 this is also a problem in Dart2JS - its ok that this is an error but dartanalyzer should warn me about this and not just crash in test or in dart2js.

[bwilkerson]

@kasperl Not sure why you added the "area-analyzer" label to this issue. It appears to me to be an interaction between IntelliJ and Dartium, having nothing to do with the analyzer. I think we should either move it out of the 'sdk' issue tracker or create a new "area-IntelliJ" label for such issues.

[terrylucas]

Please re-test with Dart 1.24.2 Stable (Dartium 50).