Bug reported to the Debian BTS recently by Arnaud Giersch. The third parameter (Bool override) is missing in the manual page for XrmCombineDatabase (XrmMergeDatabases(3X11)). It should be: void XrmCombineDatabase(XrmDatabase source_db, XrmDatabase *target_db, Bool override)
Sorry about the phenomenal bug spam, guys. Adding xorg-team@ to the QA contact so bugs don't get lost in future.
Fixed in 1a18319b3bde08dd9ef69c7cd735a76000cf3177
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