** Attachment added: "rng.cpp"
https://bugs.launchpad.net/ubuntu/+source/gcc-4.7/+bug/1153768/+attachment/3568874/+files/rng.cpp
** Description changed:
g++ crashes when compiling C++11 code. I believe the error in particular
has to with the features from the <future> and <thread> headers, i.e.
package_tasks and futures. The code in particular that crashed g++ was
when I had a type mismatch in the packaged_task<T> template parameter.
Rather than warning of a type mismatch g++ crashes.
- The particular code is the following (I do not include the prototyped
functions here but they have no errors):
+ The particular code is the following (I do not include the prototyped
functions here but they have no errors):
Note the type mismatch between the packaged_task and simulate2(void);
- #include <random>
- #include <iostream>
- #include <chrono>
- #include <thread>
- #include <future>
-
- using namespace std;
-
- static int threads = 10;
- static int runs = 1000000; //1 000 000
- double f(double);
- double simulate(double,double,int);
- double simulate2(void);
-
- int main(void){
- packaged_task<double(double,double,int)> simulations[threads];
- future<double> results[threads];
- chrono::high_resolution_clock::time_point lStart =
chrono::high_resolution_clock::now();
- for(int i = 0; i < threads; i++){
- simulations[i] = packaged_task<double(double,double,int)>
(&simulate2); //Type Mismatch
- /*Expected double(double,double,int) but actual type is
double(void)*/
- results[i] = simulations[i].get_future();
- thread(std::move(simulations[i]), 0, 4,
runs/threads).detach();//100 000 000 * 10
- }
- double sum = 0;
- for(future<double>& task : results){
- sum += task.get();
- }
- cout << "Threaded: " << sum/(double)threads << endl;
- chrono::high_resolution_clock::time_point lEnd =
chrono::high_resolution_clock::now();
- cout << "Time: " << chrono::duration_cast<chrono::milliseconds>(lEnd
- lStart).count() << endl;
- lStart = chrono::high_resolution_clock::now();
- cout << "Single:" << simulate(0, 4, runs) << endl; //1 000 000 000
Single Thread
- lEnd = chrono::high_resolution_clock::now();
- cout << "Time: " << chrono::duration_cast<chrono::milliseconds>(lEnd
- lStart).count() << endl;
- return 0;
- }
ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: g++-4.7 4.7.2-22ubuntu3
ProcVersionSignature: Ubuntu 3.8.0-11.20-generic 3.8.2
Uname: Linux 3.8.0-11-generic x86_64
ApportVersion: 2.9.1-0ubuntu1
Architecture: amd64
Date: Mon Mar 11 15:13:39 2013
ExecutablePath: /usr/lib/gcc/x86_64-linux-gnu/4.7/cc1plus
MarkForUpload: True
SourcePackage: gcc-4.7
UpgradeStatus: No upgrade log present (probably fresh install)
** Description changed:
g++ crashes when compiling C++11 code. I believe the error in particular
has to with the features from the <future> and <thread> headers, i.e.
package_tasks and futures. The code in particular that crashed g++ was
when I had a type mismatch in the packaged_task<T> template parameter.
Rather than warning of a type mismatch g++ crashes.
- The particular code is the following (I do not include the prototyped
functions here but they have no errors):
+ The particular code attached as rng.cpp
Note the type mismatch between the packaged_task and simulate2(void);
ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: g++-4.7 4.7.2-22ubuntu3
ProcVersionSignature: Ubuntu 3.8.0-11.20-generic 3.8.2
Uname: Linux 3.8.0-11-generic x86_64
ApportVersion: 2.9.1-0ubuntu1
Architecture: amd64
Date: Mon Mar 11 15:13:39 2013
ExecutablePath: /usr/lib/gcc/x86_64-linux-gnu/4.7/cc1plus
MarkForUpload: True
SourcePackage: gcc-4.7
UpgradeStatus: No upgrade log present (probably fresh install)
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https://bugs.launchpad.net/bugs/1153768
Title:
Crash on compiling c++11 code with <future> and <thread>
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