[Bug 2083131] Re: Bash's builtin command "printf" has a grave functionality bug - fails to print the format like "%.2f .1"

[Timo Aaltonen]

Hello Steven, or anyone else affected,

Accepted bash into oracular-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/bash/5.2.32-1ubuntu1.1
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
oracular to verification-done-oracular. If it does not fix the bug for
you, please add a comment stating that, and change the tag to
verification-failed-oracular. In either case, without details of your
testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: bash (Ubuntu Oracular)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-oracular

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https://bugs.launchpad.net/bugs/2083131

Title:
  Bash's builtin command "printf" has a grave functionality bug - fails
  to print the format like "%.2f .1"

Status in bash package in Ubuntu:
  Fix Released
Status in bash source package in Oracular:
  Fix Committed
Status in bash source package in Plucky:
  Fix Released
Status in bash package in Debian:
  Confirmed

Bug description:
  [Impact]

  Programs relying on the builtin printf function of bash stop working
  correctly when trying to format numbers with %f.

  [Test Plan]

  Run the following command, which currently returns "-nan" while it
  should return 52.12:

  $ bash -c "printf %.2f 52.123"

  [Where problems could occur]

  Unknown regressions in the formatting after applying the patch.

  [Original Bug Report]

  As reported in the upstream Debian Linux:
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1078556
  Bash's builtin command "printf" has a grave functionality bug - fails to print the format like "%.2f .1".

  # bash --version
  GNU bash, version 5.2.32(1)-release (x86_64-pc-linux-gnu)
  Copyright (C) 2022 Free Software Foundation, Inc.
  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

  This is free software; you are free to change and redistribute it.
  There is NO WARRANTY, to the extent permitted by law.

  # printf "%.2f\n" 0.1
  nan

  As mentioned in the above URL, upstream's configure-strtold-check patch:
  https://bugs.debian.org/cgi-bin/bugreport.cgi?att=1;bug=1078556;filename=configure-strtold-check;msg=20

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