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avoid segfaults when selecting a subset on MPI ranks that will not have any matching lattice positions to start with

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This commit is contained in:
Axel Kohlmeyer
2020-04-30 22:12:07 -04:00
parent 6913e3a6a4
commit 89f119e8aa
1 changed files with 2 additions and 2 deletions
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4
src/random_mars.cpp
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@ -201,7 +201,7 @@ void RanMars::select_subset(bigint ntarget, int nmine, int *mark, int *next)
for (int i = 0; i < nmine; i++) mark[i] = 0;
for (int i = 0; i < nmine; i++) next[i] = i+1;
next[nmine-1] = -1;
if (nmine > 0) next[nmine-1] = -1;
nmark = 0;
niter = 0;
@ -241,7 +241,7 @@ void RanMars::select_subset(bigint ntarget, int nmine, int *mark, int *next)
// flip each value based on RN < thresh
nflip = 0;
while (index >= 0) {
while ((nmine > 0) && (index >= 0)) {
if (uniform() < thresh) {
mark[index] = newvalue;
nflip++;