Created attachment 13155 [details] Patch The attached patch adds tests for corner cases that I've found while implementing a printf based on https://github.com/google/double-conversion/ but weren't covered by the printf formatting tests in glibc (which I was using as a source of test cases).
Patch submission are reviewed in the maillist (libc-alpha@sourceware.org). This one should fit in the category that wouldn't require a Copyright assignment, but if you may please check https://sourceware.org/glibc/wiki/Contribution%20checklist
Applied in https://sourceware.org/git/?p=glibc.git;a=commit;h=5d5d71b898b35331f68b582a590bb27d3eb701e7