Re: [bug-gawk] Stale cache of MPFR formatted+rounded strings

[arnold]

I have patches that fix this. I will post them once I have had
a chance to test against all the test cases you sent.

Thanks,

Arnold

address@hidden wrote:

> Thanks for the report.  The dev team will think about this.
>
> Thanks,
>
> Arnold
>
> Nethox <address@hidden> wrote:
>
> > Compiled from the tarball on GNU/Linux x86:
> > $ gawk -V | head -1
> > GNU Awk 4.2.0, API: 2.0 (GNU MPFR 3.1.5, GNU MP 6.1.2)
> >
> > Minimal reproducible test:
> > $ cat mpfrrndeval.min.awk
> > BEGIN {
> >         pi = 3.1416
> >         OFMT = "%.f"
> >         print pi  # ROUNDMODE = "N" by default.
> >         ROUNDMODE = "U"
> >         print pi
> > }
> > $ gawk -M -f ./mpfrrndeval.min.awk
> > 3
> > 3
> > $ cat mpfrrndeval.min.ok
> > 3
> > 4
> >
> > GAWK seems to cache the MPFR formatted+rounded string for each variable
> > printed with OFMT or CONVFMT (not printf). However, this cache is not
> > discarded when ROUNDMODE is assigned to a different mode, so only the first
> > printing is correct for certain.
> > Workarounds: reassigning pi=3.1416 or pi=pi+0 before every print
> > evaluation; reassigning OFMT/CONVFMT to a different precision before every
> > print evaluation; replacing each print lvalue argument with rvalues like
> > the literal 3.1416 or pi+0.
> > Useless things: --lint, --no-optimize.
> >
> > I attach a more complete test and results (filenames without .min).
> >
> > Regards.