Evan Haas b4bf3bdf7e std.fmt: Fix incorrect behavior with large floating point integers.
I consider this an interim workaround/hack until #1299 is finished.

There is a bug in the original C implementation of the errol3 (and errol4)
algorithm that can result in undefined behavior or an obviously incorrect
result (leading ':' in the output)

This change checks for those two problems and uses a slower fallback
path if they occur. I can't guarantee that this will always produce
the correct result, but since the workaround is only used if the original
algorithm is guaranteed to fail, it should never turn a previously-correct
result into an incorrect one.

Fixes #11283
2022-04-04 16:04:35 -04:00
..