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Hide more temporary variables when debugging #2445

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merged 2 commits into from
Jun 5, 2024
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@nshahan nshahan commented Jun 5, 2024

Some variables created by DDC that are not present in the original source code were being shown by the debugger in the local scope.

Update the regular expression used to detect temporary variable names. It has been simplified to: if the variable starts with 't$' or contains '$35' then it should be hidden.

DDC names it's temporary variables to start with the characters t$. Hiding all of these does hide some valid variable names that could appear in the original source, but that is the status quo and not being changed here. In addition some names that are created by the CFE and added to the program contain an illegal character '#' which DDC replaces as '$35'. Variables with this sequence in the name can't appear in the original source so we hide them as well.

This should hide variables synthetically added to support late local variables.

Some variables created by DDC that are not present in the
original source code were being shown by the debugger in the
local scope.

Update the regular expression used to detect temporary variable names.
It has been simplified to: if the variable starts with 't$' or contains
'$35' then it should be hidden.

DDC names it's temporary variables to start with the characters `t$`.
Hiding all of these does hide some valid variable names that could
appear in the original source, but that is the status quo and not
being changed here. In addition some names that are created by the
CFE and added to the program contain an illegal character '#' which
DDC replaces as '$35'. Variables with this sequence in the name can't
appear in the original source so we hide them as well.

This should hide variables synthetically added to support late local
variables.
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@elliette elliette left a comment

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Thank you!

@nshahan nshahan merged commit 9ada46f into master Jun 5, 2024
49 checks passed
@nshahan nshahan deleted the temp-detection branch June 5, 2024 20:08
copybara-service bot pushed a commit to dart-lang/sdk that referenced this pull request Jun 6, 2024
…annel, webdev, yaml_edit

Revisions updated by `dart tools/rev_sdk_deps.dart`.

crypto (https://github.com/dart-lang/crypto/compare/0a10171..7a9428a):
  7a9428a  2024-06-04  Kevin Moore  Bump lints dep (dart-lang/crypto#172)

dartdoc (https://github.com/dart-lang/dartdoc/compare/45627f9..ddb8fb4):
  ddb8fb44  2024-06-03  Konstantin Scheglov  Use package:analyzer/source/source.dart (dart-lang/dartdoc#3780)

http (https://github.com/dart-lang/http/compare/7bfbeea..a3567f8):
  a3567f8  2024-06-05  Brian Quinlan  Prepare to release cronet_http 1.3.1 (dart-lang/http#1228)
  7addc61  2024-06-05  Hossein Yousefi  [cronet_http] Upgrade jnigen to 0.9.2 to close `#1213` (dart-lang/http#1225)
  eb87a60  2024-06-04  Anikate De  pkgs/ok_http: Close the client (override `close()` from `BaseClient`) (dart-lang/http#1224)
  9f022d2  2024-06-04  Anikate De  pkgs/http_client_conformance_tests: add boolean flag `supportsFoldedHeaders` (dart-lang/http#1222)
  90837df  2024-06-03  Anikate De  pkgs/ok_http: Condense JNI Bindings to `single_file` structure, and add missing server errors test (dart-lang/http#1221)

logging (https://github.com/dart-lang/logging/compare/73f043a..dbd6829):
  dbd6829  2024-06-04  Sarah Zakarias  Update `topics` in `pubspec.yaml` (dart-lang/logging#165)

test (https://github.com/dart-lang/test/compare/2464ad5..83c597e):
  83c597e5  2024-06-05  Jacob MacDonald  enable asserts in dart2wasm tests (dart-lang/test#2241)
  60353804  2024-06-04  Nate Bosch  Remove an unnecessary `dynamic` (dart-lang/test#2239)
  43ad4cd8  2024-06-03  Kevin Moore  random cleanup (dart-lang/test#2232)
  18db77c3  2024-06-02  Kevin Moore  prepare to publish test_api (dart-lang/test#2238)
  cd72e8d8  2024-06-02  Kevin Moore  Prepare to publish (dart-lang/test#2237)
  9c6adaa7  2024-06-01  Kevin Moore  fixes (dart-lang/test#2235)
  0110a80b  2024-06-01  dependabot[bot]  Bump the github-actions group with 2 updates (dart-lang/test#2236)
  b1b2c029  2024-06-01  Martin Kustermann  Fix `dart run test -p chrome -c dart2wasm` (dart-lang/test#2233)

tools (https://github.com/dart-lang/tools/compare/86b3661..4321aec):
  4321aec  2024-06-05  Andrew Kolos  [unified_analytics] Suppress any `FileSystemException` thrown during `Analytics.send` (dart-lang/tools#274)
  e5d4c8b  2024-06-03  dependabot[bot]  Bump actions/checkout from 4.1.5 to 4.1.6 in the github-actions group (dart-lang/tools#271)

web_socket_channel (https://github.com/dart-lang/web_socket_channel/compare/45b8ce9..bf69990):
  bf69990  2024-06-03  Thibault Chatillon  bump web_socket dependency 0.1.3 -> 0.1.5 (dart-lang/web_socket_channel#370)
  5b428dd  2024-06-02  dependabot[bot]  Bump actions/checkout from 4.1.5 to 4.1.6 in the github-actions group (dart-lang/web_socket_channel#371)
  afd1e3c  2024-05-23  Brian Quinlan  Remove `--fatal-infos` from `dart pub downgrade` analysis (dart-lang/web_socket_channel#367)
  cb20b71  2024-05-23  Sarah Zakarias  Add `topics` to `pubspec.yaml` (dart-lang/web_socket_channel#362)
  8514229  2024-05-22  Kevin Moore  Bump and fix lints (dart-lang/web_socket_channel#366)

webdev (https://github.com/dart-lang/webdev/compare/a97c2a1..9ada46f):
  9ada46fc  2024-06-05  Nicholas Shahan  Hide more temporary variables when debugging (dart-lang/webdev#2445)

yaml_edit (https://github.com/dart-lang/yaml_edit/compare/963e7a3..08a146e):
  08a146e  2024-06-06  Kavisi  Fix splice list insertion (dart-lang/yaml_edit#84)
  561309e  2024-06-01  dependabot[bot]  Bump actions/checkout from 4.1.5 to 4.1.6 in the github-actions group (dart-lang/yaml_edit#85)
  b582fd5  2024-05-31  Kavisi  Fix error thrown when inserting keys (dart-lang/yaml_edit#80)

Change-Id: I36acbc26fe97d8a1e3fdfa5f4855cc4be7d84dd7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/370080
Commit-Queue: Devon Carew <devoncarew@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
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