Yukihiro "Matz" Matsumoto 478ada3bf4 fp_uscale.c: clamp precision in %g to avoid OOB in fixed_width ...

When sprintf is called with a precision larger than the double's
significand width (e.g. "%.51g"), fixed_width() indexed pow10 tables
out of bounds and produced a negative shift exponent. Cap the
internal digit count to 18 in the %g branch, matching the existing
%e and %f branches; downstream loops already zero-pad to the
caller's precision so visible output is unchanged.

Co-authored-by: Claude <noreply@anthropic.com>

2026-05-12 11:19:20 +09:00

..

sprintf.rb

fp_uscale.c: clamp precision in %g to avoid OOB in fixed_width

2026-05-12 11:19:20 +09:00