Code to reproduce bug in hpx::lcos::promise

gistfile1.txt

#include <stdio.h>
#include <stdlib.h>
#include <vector>
#include <valarray>

#define MAX_BUFFER (64*1024)

int main( int argc, char* argv[] ) {
	if( argc != 3) {
		printf( "average <file> <period>\n" );
		abort();	
	}

	double period = atof(argv[2]);
	if( period <= 0.0 ) {
		printf( "Period must be positive\n" );
		abort();
	}
	static char buffer[MAX_BUFFER];
	double entry;

	std::vector<std::valarray<double>> data;

	FILE* fp = fopen( argv[1], "rt" );

	if( fp == NULL ) {
		printf( "Unable to open %s\n", argv[1] );
		abort();
	}
	
	while( !feof(fp) ) {
		fgets( buffer, MAX_BUFFER, fp );
		char* ptr = buffer;
		while( *ptr == ' ' || *ptr == '\t' ) {
			ptr++;				
		} 
		std::vector<double> row;
		while( *ptr != '\n' ) {	
			entry = atof(ptr);
			row.push_back(entry);
			while( !(*ptr == ' ' || *ptr == '\t') ) {
				ptr++;				
			} 
			while( *ptr == ' ' || *ptr == '\t' ) {
				ptr++;				
			} 
		}
		data.push_back(std::valarray<double>(row.data(), row.size()));
	}


	int head = 0, tail = 0;
	for( int i = 0; i < data.size(); i++ ) {
		if( data[i][0] - data[0][0] <= period ) {
			head++;
		} else {
			break;
		}	
	}

	for( head = head; head < data.size(); head++ ) {
		while( data[head][0] - data[tail][0] > period ) {
			tail++;
		}
		double weight_sum = 0.0;
		for( int i = tail; i <= head; i++ ) {		
				
		}	
	}


	return 0;

}