Add a workaround for Boost Spirit issue #688
Since Boost 1.76.0 there is a regression in the outputting of numbers: https://github.com/boostorg/spirit/issues/688
Updated by Roel Standaert about 2 months ago
The bug occurs when it has to round the input up in order to fit into the given precision, so in our
round_js_str we get a
double as input, but ask it to output it with at most 7 decimals.
real_to_s function on the other hand gets a
float as input, and thus already has less precision, so at the very least I can't reproduce the issue with the numbers I used to test
round_js_str. That suggests we may also be able to work around the issue by sacrificing precision beforehand, or increasing precision where we use
If the bug affects
Postgres.C as well, we're a lot less likely to trigger it. I will look further to see if there is any number that will trigger the bug.