"printf %d ''" should diagnose the empty string

[Paul Eggert]

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc -std=gnu23
Compilation CFLAGS: -g -O2
uname output: Linux penguin.cs.ucla.edu 6.11.6-200.fc40.x86_64 #1 SMP 
PREEMPT_DYNAMIC Fri Nov  1 16:09:34 UTC 2024 x86_64 GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 5.3
Patch Level: 0
Release Status: beta

Description:

printf doesn't diagnose attempts to print empty strings as numbers. This 
doesn't conform to POSIX and disagrees with the traditional Unix printf 
command.

Repeat-By:

printf %d ''

This should behave like "printf %d ' '", and should output a diagnostic 
and exit with status 1; instead it silently exits with status 0.

Fix:
Attached.

0001-diagnose-attempts-to-printf-as-a-number.patch
Description: Text Data