rank_stacks tweaks

rank_stacks tweaks

- Cluster stacks on printed prefix instead of entire stack.
- Print records with a stack that is a prefix of another stack (this happens for d8 errors where there is no dart2js stack)

R=sigmund@google.com

Committed: https://github.com/dart-lang/sdk/commit/dbcc7835a76fd752b4a8b886cc877b0cda7ade77

[sra1, 2017-09-01 17:06:52]

Patchset #2 (id:20001) has been deleted

[sra1, 2017-09-01 17:06:58]

Patchset #1 (id:1) has been deleted

[sra1, 2017-09-01 17:09:37]

Description was changed from

==========
Cluster stacks on printed prefix

TBR=sigmund@google.com
==========

to

==========
rank_stacks tweaks

- Cluster stacks on printed prefix instead of entire stack.
- Print records with a stack that is a prefix of another stack (this happens for
d8 errors where there is no dart2js stack)


TBR=sigmund@google.com
==========

[Siggi Cherem (dart-lang), 2017-09-01 17:17:14]

lgtm

[sra1, 2017-09-01 17:26:23]

Description was changed from

==========
rank_stacks tweaks

- Cluster stacks on printed prefix instead of entire stack.
- Print records with a stack that is a prefix of another stack (this happens for
d8 errors where there is no dart2js stack)


TBR=sigmund@google.com
==========

to

==========
rank_stacks tweaks

- Cluster stacks on printed prefix instead of entire stack.
- Print records with a stack that is a prefix of another stack (this happens for
d8 errors where there is no dart2js stack)

R=sigmund@google.com

Committed:
https://github.com/dart-lang/sdk/commit/dbcc7835a76fd752b4a8b886cc877b0cda7ade77
==========

[sra1, 2017-09-01 17:26:25]

Committed patchset #1 (id:40001) manually as
dbcc7835a76fd752b4a8b886cc877b0cda7ade77 (presubmit successful).