$smwgLinksInValue leading to PHP crashes when set to "true"

[kghbln]

Setup and configuration

• Semantic MediaWiki: 2.5.0-alpha (9a82356)
• MediaWiki: 1.27.1 (a52d35d)
• PHP: 5.6.27
• MariaDB: 10.0.27

Issue

The help page on $smwgLinksInValues still warns about possible PHP crashes if set the configuration parameter is set to "true" due to an eight year old warning.

Quote @mwjames:

So it is time to reevaluate the truthfulness of this statement or at least given an indication of how many links would break the wiki. For example a text with xyz characters and x amount of links in values would break the wiki for the PCRE y version.

It is however now possible to avoid changing this setting by using the #set' parser function as these examples show but what about in-text annotations?

To be able to test I have changed the configruation of sandbox to $smwgLinksInValues = true;.

A test page for this issue can be found here.

[kghbln]

On the spot which caused #1961 (comment) to exit I get this in the promt:

(3371/3427)     Finished processing ID 3376 (Utilisateur:Lalquier)
(3373/3427)     Finished processing ID 3378 (This_page_supports_semantic_in-text_annotations_(e.g._"Is_specified_asWorld_Heritage_Site")_to_build_structured_and_queryable_content_provided_by_Semantic_MediaWiki._For_a_comprehensive_description_on_how_to_use_annotations_or_the#0#ask_parser_function,_please_have_a_look_at_the_getting_started,_in-text_annotation,_or_inline_queries_help_page.This_page_supports_semantic_in-text_annotations_(e.g._"Is_specified_asWorld_Heritage_Site")_to_build_structured_and_queryable_content_provided_)
(3374/3427)     Finished processing ID 3379 (Utilisateur:Emilzola)
(3378/3427)     Finished processing ID 3401 (Subobject_and_"best"_value_query#0#_QUERYcd0dd34fd10ddcd0907e4b6a34e98dfd)
(3379/3427)     Finished processing ID 3402 (Subobject_and_"best"_value_query#0#_QUERY5ee3d99470eef1e74c20c3fd9f5eeb48)
(3380/3427)     Finished processing ID 3403 (Subobject_and_"best"_value_query#0#_QUERY5d5addc5ff705e4301fa60f45f3fafa3)
(3381/3427)     Finished processing ID 3404 (SEA:Internal#0#_QUERYc14b0a6b4f5c29750d69874553aaf8d3)
(3382/3427)     Finished processing ID 3405 (SEA:Internal#0#_QUERYc62ef87cee27cd0afd3f6a2ad07efd95)
(3383/3427)     Finished processing ID 3406 (This_page_supports_semantic_in-text_annotations_(e.g._"Is_specified_asWorld_Heritage_Site")_to_build_structured_and_queryable_content_provided_by_Semantic_MediaWiki._For_a_comprehensive_description_on_how_to_use_annotations_or_the#0#ask_parser_function,_please_have_a_look_at_the_getting_started,_in-text_annotation,_or_inline_queries_help_page.This_page_supports_semantic_in-text_annotations_(e.g._"Is_specified_asWorld_Heritage_Site")_to_build_structured_and_queryable_content_provided_)
(3392/3427)     Finished processing ID 3428 (This_page_supports_semantic_in-text_annotations_(e.g._"Is_specified_asWorld_Heritage_Site")_to_build_structured_and_queryable_content_provided_by_Semantic_MediaWiki._For_a_comprehensive_description_on_how_to_use_annotations_or_the#0#ask_parser_function,_please_have_a_look_at_the_getting_started,_in-text_annotation,_or_inline_queries_help_page.This_page_supports_semantic_in-text_annotations_(e.g._"Is_specified_asWorld_Heritage_Site")_to_build_structured_and_queryable_content_provided_)
(3412/3427)     Finished processing ID 3448 (This_page_supports_semantic_in-text_annotations_(e.g._"Is_specified_asWorld_Heritage_Site")_to_build_structured_and_queryable_content_provided_by_Semantic_MediaWiki._For_a_comprehensive_description_on_how_to_use_annotations_or_the#0#ask_parser_function,_please_have_a_look_at_the_getting_started,_in-text_annotation,_or_inline_queries_help_page.This_page_supports_semantic_in-text_annotations_(e.g._"Is_specified_asWorld_Heritage_Site")_to_build_structured_and_queryable_content_provided_)

This does not really look healthy.

[mwjames]

(3373/3427) Finished processing ID 3378 (This_page_supports_semantic_in-text_annotations_(e.g._"Is_specified_asWorld_Heritage_Site")_to_build_structured_and_queryable_content_provided_by_Semantic_MediaWiki._For_a_comprehensive_description_on_how_to_use_annotations_or_the#0#ask_parser_function,_please_have_a_look_at_the_getting_started,in-text_annotation,or_inline_queries_help_page.This_page_supports_semantic_in-text_annotations(e.g."Is_specified_asWorld_Heritage_Site")to_build_structured_and_queryable_content_provided)

This is the text shown above the the Edit window, so yes this looks strange (well the message text contains [[ .. ]] links).

[kghbln]

This is the text shown above the the Edit window, so yes this looks strange (well the message text contains [[ .. ]] links).

Though not the nicest outcome but still a good to know thing what may be worked upon at some time. Anther insight from this: using #set works.

[kghbln]

So the answer is "yes" the issue is still there with recent versions of PCRE though showing a different behaviour.