Print <<NULL>> instead of crashing.

Print <Null> instead of crashing.

R=asgerf@google.com

Committed: https://github.com/dart-lang/sdk/commit/ae90e640eaf8042d84bb7357a2e03107588c101f

[ahe, 2017-01-06 15:31:01]

Description was changed from

==========
Print <<NULLL>> instead of crashing.
==========

to

==========
Print <<NULL>> instead of crashing.
==========

[ahe, 2017-01-06 15:32:31]

ahe@google.com changed reviewers:
+ asgerf@google.com

[ahe, 2017-01-06 15:32:31]

https://codereview.chromium.org/2617973002/diff/1/pkg/kernel/lib/text/ast_to_...
File pkg/kernel/lib/text/ast_to_text.dart (right):

https://codereview.chromium.org/2617973002/diff/1/pkg/kernel/lib/text/ast_to_...
pkg/kernel/lib/text/ast_to_text.dart:397: writeSymbol("<<NULL>>");
Any suggestions for a better string to use here?

[asgerf, 2017-01-06 15:33:36]

lgtm

https://codereview.chromium.org/2617973002/diff/1/pkg/kernel/lib/text/ast_to_...
File pkg/kernel/lib/text/ast_to_text.dart (right):

https://codereview.chromium.org/2617973002/diff/1/pkg/kernel/lib/text/ast_to_...
pkg/kernel/lib/text/ast_to_text.dart:397: writeSymbol("<<NULL>>");
On 2017/01/06 15:32:31, ahe wrote:
> Any suggestions for a better string to use here?

<Null> is consistent with what we write in defaultNode

[ahe, 2017-01-06 15:35:58]

Description was changed from

==========
Print <<NULL>> instead of crashing.
==========

to

==========
Print <Null> instead of crashing.
==========

[ahe, 2017-01-06 15:37:44]

Great idea, thank you!

https://codereview.chromium.org/2617973002/diff/1/pkg/kernel/lib/text/ast_to_...
File pkg/kernel/lib/text/ast_to_text.dart (right):

https://codereview.chromium.org/2617973002/diff/1/pkg/kernel/lib/text/ast_to_...
pkg/kernel/lib/text/ast_to_text.dart:397: writeSymbol("<<NULL>>");
On 2017/01/06 15:33:36, asgerf wrote:
> On 2017/01/06 15:32:31, ahe wrote:
> > Any suggestions for a better string to use here?
> 
> <Null> is consistent with what we write in defaultNode

Done.

[ahe, 2017-01-11 11:35:36]

Description was changed from

==========
Print <Null> instead of crashing.
==========

to

==========
Print <Null> instead of crashing.

R=asgerf@google.com

Committed:
https://github.com/dart-lang/sdk/commit/ae90e640eaf8042d84bb7357a2e03107588c101f
==========

[ahe, 2017-01-11 11:35:37]

Committed patchset #2 (id:20001) manually as
ae90e640eaf8042d84bb7357a2e03107588c101f (presubmit successful).