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epriestley a77cfb023d When a proxy future wraps a future which throws an exception, resolve with an exception
Summary:
Ref T13528. When you call `$future->resolve()`, we currently guarantee it is resolved by calling `FutureIterator->resolveAll()`.

`resolveAll()` does not actually "resolve()" futures: it guarantees that they are ready to "resolve()", but does not actually call "resolve()".

In particular, this means it does not throw exceptions.

This can lead to a case where a Future has "resolve()" called directly (e.g., via a FutureProxy), uses "FutureIterator" to resolve itself, throws an exception inside "FutureIterator", the exception is captured and attached to the Futuer, then the outer future tries to access results. This fails since it's out-of-order.

This can happen in practice with syntax highlighting futures, which may proxy pygments futures.

Instead, "resolveAll()" before testing for exaceptions.

Test Plan:
  - Locally, tried to highlight a Paste with an unrecognized lexer extension using Pygments.
  - Before patch: fatal when trying to access results of a Future with no results (because it has an exception instead).
  - After patch: resolution throws the held exception properly.
  - (See also next change.)

Maniphest Tasks: T13528

Differential Revision: https://secure.phabricator.com/D21198
2020-05-01 09:12:22 -07:00
bin When "ArcanistRuntime" exits with a nonzero exit code, emit that exit code 2020-02-27 06:17:02 -08:00
externals Fully merge "libphutil/" into "arcanist/" 2020-02-12 15:17:38 -08:00
resources Merge utility/support changes from "wilds" to "master" 2020-02-13 14:10:09 -08:00
scripts Remove obscure features no longer supported by Toolsets from "classic" Arcanist 2020-02-17 09:28:39 -08:00
src When a proxy future wraps a future which throws an exception, resolve with an exception 2020-05-01 09:12:22 -07:00
support Port "arc prompts" from wilds and fix a path issue in shell completion 2020-04-11 10:43:05 -07:00
.arcconfig Set "history.immutable" to "false" explicitly in .arcconfig in Arcanist 2016-08-03 08:13:09 -07:00
.arclint Add new "Hardpoint" classes to support request parallelization 2020-04-08 09:23:50 -07:00
.arcunit Rough version of configuration driven unit test engine 2015-08-11 06:54:16 +10:00
.editorconfig Test XHPAST linter rules in isolation 2015-11-19 08:57:23 +11:00
.gitignore Merge utility/support changes from "wilds" to "master" 2020-02-13 14:10:09 -08:00
LICENSE Fix text lint issues 2015-04-07 18:09:27 +10:00
NOTICE Remove duplicate newline 2014-07-17 08:25:22 +10:00
README.md Move README to Markdown 2015-04-13 13:01:16 -07:00

Arcanist is the command-line tool for Phabricator. It allows you to interact with Phabricator installs to send code for review, download patches, transfer files, view status, make API calls, and various other things. You can read more in the User Guide

For more information about Phabricator, see http://phabricator.org/.

LICENSE

Arcanist is released under the Apache 2.0 license except as otherwise noted.