71e9716137
This fixes the months-based addition for year_month when the year_month's month component is 0. libstdc++-v3/ChangeLog: * include/std/chrono (year_month::operator+): Properly handle a month value of 0 by casting the month value to int before subtracting 1 from it so that the difference is sign-extended in the subsequent addition. * testsuite/std/time/year_month/1.cc: Test adding months to a year_month whose month component is below or above the normalized range of [1,12]. |
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