Cling issue #21283
Description
Check duplicate issues.
- Checked for duplicates
Description
#include <iostream>
#include <iomanip>
#include <format>
void a() {
std::cout << "a: " << std::setw(3) << 1 << std::endl;
}#include <iostream>
#include <iomanip>
#include <format>
void b() {
std::cout << std::format("b: {:3}\n", 2);
}Reproducer
$ root
ROOT Version: 6.39.01
Built for linuxx8664gcc on Feb 14 2026, 12:09:28
From heads/master@v6-39-01-1045-g6f083f6ae
root [0] gROOT->Time()
Real time 0:00:03.188480, CP time 0.050
root [1] .L a.C++
Info in <TUnixSystem::ACLiC>: creating shared library /home/musinsky/ROOT_issue/./a_C.so
Real time 0:00:04.558429, CP time 0.120
root [2] .L a.C++
Info in <ACLiC>: unmodified script has already been compiled and loaded
Info in <ACLiC>: it will be regenerated and reloaded!
Info in <TUnixSystem::ACLiC>: creating shared library /home/musinsky/ROOT_issue/./a_C.so
Real time 0:00:04.583053, CP time 0.010
$ root
ROOT Version: 6.39.01
Built for linuxx8664gcc on Feb 14 2026, 12:09:28
From heads/master@v6-39-01-1045-g6f083f6ae
root [0] gROOT->Time()
Real time 0:00:01.515612, CP time 0.030
root [1] .L b.C++
Info in <TUnixSystem::ACLiC>: creating shared library /home/musinsky/ROOT_issue/./b_C.so
Real time 0:00:09.177981, CP time 0.270 // !!! 2x longer time !!!
root [2] .L b.C++
Info in <ACLiC>: unmodified script has already been compiled and loaded
Info in <ACLiC>: it will be regenerated and reloaded!
*** Break *** segmentation violation
- 2x longer time ?
- segmentation violation ?
Tested also on Alma 9 in current Alice environment (ROOT 6.36.04, GCC 14.2.0):
- compilation time of
a.Candb.Cis approximately the same - same segmentation violation after the second (repeated) compilation of
b.C
ROOT version
ROOT v6.39.01
Built for linuxx8664gcc on Feb 14 2026, 12:09:28
From heads/master@v6-39-01-1045-g6f083f6ae
With c++ (GCC) 15.2.1 20260123 (Red Hat 15.2.1-7) std202002
Binary directory: /cern/root_master/bin
compile with CMAKE_CXX_STANDARD=20
Installation method
build from source
Operating system
Fedora 43
Additional context
No response