10000 Add Yaml::PARSE_EXCEPTION_ON_DUPLICATE to throw exceptions on duplicates by alexpott · Pull Request #19529 · symfony/symfony · GitHub
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Add Yaml::PARSE_EXCEPTION_ON_DUPLICATE to throw exceptions on duplicates #19529

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Fix upgrade notes for 4.0
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alexpott committed Aug 8, 2016
commit 50c16e9dbf5968ad95ca28f768aa0beff2d40ca8
3 changes: 1 addition & 2 deletions UPGRADE-4.0.md
Original file line number Diff line number Diff line change
Expand Up @@ -230,8 +230,7 @@ Yaml
* The `!!php/object` tag to indicate dumped PHP objects was removed in favor of
the `!php/object` tag.

* Support for silently ignoring duplicate keys in YAML has been deprecated and
will lead to a `ParseException` in Symfony 4.0.
* Duplicate keys in YAML leads to a `ParseException`.


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