Bug#839280: libc6: asprintf(&c, "%F", 1.0) puts 0.00000 in c on raspberry pi zero v1.3.

[Florian Weimer]

* Noah Williams:

>* What led up to the situation? I was building a robot, and needed a 
> raspberry pi zero to send a floating point number formatted as a string to an 
> arduino.
>* What exactly did you do (or not do) that was effective (or
>  ineffective)? I've tried passing bigger numbers than 1.0 (like 100.0) , 
> but it didn't seem to do anything different, "%F %F" does however seem to get 
> the second argument right.
>* What was the outcome of this action? It printed out something like: 
> -0.1 1.0 
>* What outcome did you expect instead? 1.0 0.0

Please post complete, minimal source code, along with a description
how you compiled your program (and for what architecture).  Thanks.

Bug#839280: libc6: asprintf(&c, "%F", 1.0) puts 0.00000 in c on raspberry pi zero v1.3.

[Noah Williams]

Package: libc6
Version: 2.19-18+deb8u6
Severity: normal

Dear Maintainer,

   * What led up to the situation? I was building a robot, and needed a 
raspberry pi zero to send a floating point number formatted as a string to an 
arduino.
   * What exactly did you do (or not do) that was effective (or
 ineffective)? I've tried passing bigger numbers than 1.0 (like 100.0) , 
but it didn't seem to do anything different, "%F %F" does however seem to get 
the second argument right.
   * What was the outcome of this action? It printed out something like: 
-0.1 1.0 
   * What outcome did you expect instead? 1.0 0.0
   Also I'm sorry if I'm doing something wrong in the bug reporting process, 
this is my first time using this reportbug program.



-- System Information:
Distributor ID: Raspbian
Description:Raspbian GNU/Linux 8.0 (jessie)
Release:8.0
Codename:   jessie
Architecture: armv6l

Kernel: Linux 4.4.21+
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libc6 depends on:
ii  libgcc1  1:4.9.2-10

libc6 recommends no packages.

Versions of packages libc6 suggests:
ii  debconf [debconf-2.0]  1.5.56
pn  glibc-doc  
ii  locales2.19-18+deb8u6

-- debconf information:
  libraries/restart-without-asking: false
  glibc/disable-screensaver:
  glibc/restart-services:
  glibc/upgrade: true
  glibc/restart-failed: