Incorrect handling of scanf("%*c")

ROOT
1

Hi,

I’ve noticed that scanf in CINT doesn’t handle the assignment-suppression character ‘*’ correctly when the list of pointer arguments is empty. The following f1.C code shows the problem for “%c” but other format specifications are also affected.

void f1()
{
  Char_t c;
  scanf("%*c");  
  scanf("%*c%c", &c);
  printf("%c\n", c);
}

CINT fails but the compiled code works as expected

root [0] .x f1.C
Limitation: scanf only takes upto 11 arguments f1.C:4:
*** Interpreter error recovered ***

root [0] .x f1.C++
Info in <TUnixSystem::ACLiC>: creating shared library /home/malusek/test/root/./f1_C.so
123  # my input
3    # output from printf

openSUSE 10.3, x86_64, ROOT 5.21/06

2

Hi,

thanks for reporting! I would have preferred this report to be on Savannah - it’s just easier for us to track.

I will try to still get it fixed on Monday, so it can make it into the release - but no promises, maybe it only shows up after the release. Either way I’ll let you know!

Cheers, Axel.

3

Hi,

thanks for your report! This is now fixed and will be part of v5.22.

Cheers, Axel.