std::numeric_limits<int>::traps = false when integer arithmetic traps
---------------------------------------------------------------------
Key: STDCXX-65
URL: http://issues.apache.org/jira/browse/STDCXX-65
Project: STDCXX
Type: Bug
Components: 18. Language Support
Versions: 4.1.2
Environment: all
Reporter: Martin Sebor
Assigned to: Martin Sebor
Priority: Minor
Fix For: 4.1.3
The program below aborts. See also the related LWG issue 497:
http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-active.html#497
$ cat t.cpp && nice make t -r CPPOPTS=-DSIGTRAP=5 && ./t
#include <cassert>
#include <csetjmp>
#include <csignal>
#include <limits>
std::jmp_buf env;
extern "C" void handle_trap (int)
{
std::longjmp (env, 1);
}
volatile int zero;
int main ()
{
const bool traps = std::numeric_limits<int>::traps;
bool trapped = false;
std::signal (SIGFPE, handle_trap);
std::signal (SIGTRAP, handle_trap);
if (0 == setjmp (env)) {
zero = 2 / zero;
}
else {
trapped = true;
}
assert (traps && trapped || !traps && !trapped);
}
eccp -c -I/build/sebor/dev/stdlib/include/ansi -D_RWSTDDEBUG
-D_RWSTD_USE_CONFIG -I/build/sebor/eccp-3.6-11s/include
-I/build/sebor/dev/stdlib/include -I/build/sebor/dev/stdlib/../rwtest
-I/build/sebor/dev/stdlib/../rwtest/include
-I/build/sebor/dev/stdlib/tests/include -DSIGTRAP=5 -A -x
--template_directory=/build/sebor/eccp-3.6-11s/lib -g --display_error_number
--remarks --diag_suppress 193,236,340,401,261,479,487,678,679,815 t.cpp
eccp t.o -o t -L/build/sebor/eccp-3.6-11s/rwtest -lrwtest11s
--template_directory=/build/sebor/eccp-3.6-11s/lib
-L/build/sebor/eccp-3.6-11s/lib -lstd11s -lm
t.cpp:30: Assertion 'traps && trapped || !traps && !trapped' failed.
/build/sebor/eccp-3.6-11s/tests/t:__rw_assert_fail__4__rwFPCcT1iT1+0x84
/build/sebor/eccp-3.6-11s/tests/t:main+0xcc
/build/sebor/eccp-3.6-11s/tests/t:_start+0x5c
Abort (core dumped)
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