Bug path

test ‘test’: events 1-2 18 void test (void) ^~~~ | (1) entry to ‘test’ [...] 21 signal(SIGINT, handler); /* { dg-message "registering 'handler' as signal handler" } */ ~~~~~~~~~~~~~~~~~~~~~~~ | (2) registering ‘handler’ as signal handler

event 3 (3): later on, when the signal is delivered to the process

handler ‘handler’: events 4-5 13 static void handler(int signum) ^~~~~~~ | (4) entry to ‘handler’ 14 { 15 custom_logger("got signal"); ~~~~~~~~~~~~~~~~~~~~~~~~~~~ | (5) calling ‘custom_logger’ from ‘handler’ custom_logger ‘custom_logger’: events 6-7 8 void custom_logger(const char *msg) ^~~~~~~~~~~~~ | (6) entry to ‘custom_logger’ 9 { 10 fprintf(stderr, "LOG: %s", msg); /* { dg-warning "call to 'fprintf' from within signal handler" } */ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | (7) call to ‘fprintf’ from within signal handler