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2021-09-07T03:21:40Z

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Wikipedia>Redrose64: /* double pipe in {{efn}} causes non-obvious error */ the issue is not specific to this template. All templates that use unnamed parameters are susceptible to this

2021-08-30T06:54:32Z

double pipe in {{efn}} causes non-obvious error: the issue is not specific to this template. All templates that use unnamed parameters are susceptible to this

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== double pipe in <nowiki>{{efn}}</nowiki> causes non-obvious error ==

This is in reference to [[Help:Cite errors/Cite error ref no input]]. You'll get that error message ("There are <nowiki><ref></nowiki> tags on this page without content in them") if you accidentally put a double pipe in an <nowiki>{{efn}}</nowiki> template: <code><nowiki>{{efn||Oops}}</nowiki></code>. The reason isn't necessarily obvious when you get the error. You may want to mention this.

I couldn't demo it here because it only seems to happen in article space, not talk space. In talk or User space, the <nowiki>{{efn}}</nowiki> just disappears. [[User:Danbloch|Dan Bloch]] ([[User talk:Danbloch|talk]]) 04:30, 30 August 2021 (UTC)
:The issue is not specific to this template. All templates that use unnamed parameters are susceptible to this - the parameters are position-dependent (so are sometimes called positional parameters) and each pipe marks a position. So in <code><nowiki>{{efn||Oops}}</nowiki></code> the first positional parameter is the null string, and the word "Oops" is now in the second positional parameter. --[[User:Redrose64|<span style="color:#a80000; background:#ffeeee; text-decoration:inherit">Red</span>rose64]] 🌹 ([[User talk:Redrose64|talk]]) 06:54, 30 August 2021 (UTC)

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Richardpruen: 1 revision imported

Wikipedia>Redrose64: /* double pipe in {{efn}} causes non-obvious error */ the issue is not specific to this template. All templates that use unnamed parameters are susceptible to this