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epriestley e03079aaaa Try harder to present display/rendering exceptions to the user using standard exception handling
Summary:
Ref T13250. When exceptions occur in display/rendering/writing, they currently go straight to the fallback handler. This is a minimal handler which doesn't show a stack trace or include any debugging details.

In some cases, we have to do this: some of these exceptions prevent us from building a normal page. For example, if the menu bar has a hard fatal in it, we aren't going to be able to build a nice exception page with a menu bar no matter how hard we try.

However, in many cases the error is mundane: something detected something invalid and raised an exception during rendering. In these cases there's no problem with the page chrome or the rendering pathway itself, just with rendering the page data.

When we get a rendering/response exception, try a second time to build a nice normal exception page. This will often work. If it doesn't work, fall back as before.

Test Plan:
  - Forced the error from T13250 by applying D20136 but not D20134.
  - Before:

{F6205001}

  - After:

{F6205002}

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13250

Differential Revision: https://secure.phabricator.com/D20137
2019-02-11 14:40:52 -08:00
bin Remove dead symlink 2019-01-10 16:27:45 -08:00
conf Remove an old digest in Celerity code and some obsolete configuration options 2019-01-04 13:43:38 -08:00
externals Update the "SES" and "sendmail" mailers for the new API; remove "encoding" 2019-01-16 13:18:55 -08:00
resources When an edit overrides an object lock, note it in the transaction record 2019-02-09 06:10:07 -08:00
scripts Remove "iconv" PHP extension dependency 2019-01-30 19:46:58 -08:00
src Try harder to present display/rendering exceptions to the user using standard exception handling 2019-02-11 14:40:52 -08:00
support Use phutil_microseconds_since(...) to simplify some timing arithmetic 2018-11-08 16:46:32 -08:00
webroot When an edit overrides an object lock, note it in the transaction record 2019-02-09 06:10:07 -08:00
.arcconfig Set "history.immutable" to "false" explicitly in .arcconfig 2016-08-03 08:12:49 -07:00
.arclint Begin adding test coverage to GitHub Events API parsers 2016-03-09 09:30:07 -08:00
.arcunit Use the configuration driven unit test engine 2015-08-11 07:57:11 +10:00
.editorconfig Fix text lint issues 2015-02-12 07:00:13 +11:00
.gitignore Make i18n string extraction faster and more flexible 2016-07-04 10:23:30 -07:00
LICENSE Fix text lint issues 2015-02-12 07:00:13 +11:00
NOTICE Update Phabricator NOTICE file to reflect modern legal circumstances 2014-06-25 13:42:13 -07:00
README.md Remove push to IRC from "readme.md" too 2015-10-24 18:39:16 -07:00

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