In the debug console, the following code:

tostring( mw.html.create( 'h2' ) )

Produces the error "Lua error in mw.html.lua at line 368: Invalid tag name: h2." This is due to the over-zealous Lua pattern at line 78 of mw.html.lua [1]

This should probably be changed from:

return s:match( '^[a-zA-Z]+$' )

To:

return s:match( '^[a-zA-Z]+[0-9]*$' )

Or as it seems that h1 to h6 are the only tags containing numbers, perhaps this could be:

return s:match( '^[a-zA-Z]+$' ) or s:match( '^h[1-6]$' )

[1] https://git.wikimedia.org/blob/mediawiki%2Fextensions%2FScribunto/8e22e0f1f85a296aab805aa2d45e3024acd03f55/engines%2FLuaCommon%2Flualib%2Fmw.html.lua#L78

Version: unspecified
Severity: normal