From ecbf5b10d4fe53306be87f95ce5c04b2d93af8a0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Ne=C4=8Dada?= <marek@necada.org>
Date: Fri, 13 Sep 2019 16:20:39 +0300
Subject: [PATCH] Fix infinite loop in empty lattice modes generation

Former-commit-id: 1349035090712935a0d77d64c175e4358fb4d487
---
 qpms/lattices2d.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/qpms/lattices2d.c b/qpms/lattices2d.c
index 0f5978c..6249f00 100644
--- a/qpms/lattices2d.c
+++ b/qpms/lattices2d.c
@@ -909,8 +909,13 @@ size_t qpms_emptylattice2_modes_maxfreq(double **target_freqs,
 
   size_t generated = 0;
   PGenReturnDataBulk rd;
-  while((rd = PGen_fetch_cart2(&Kgen, capacity - generated, Kpoints + generated)).flags & PGEN_NOTDONE)
+  while((rd = PGen_fetch_cart2(&Kgen, capacity - generated, Kpoints + generated)).flags & PGEN_NOTDONE) {
     generated += rd.generated;
+    if (capacity <= generated) {
+      PGen_destroy(&Kgen); 
+      break;
+    }
+  }
 
   double *thefreqs;
   QPMS_CRASHING_MALLOC(thefreqs, generated * sizeof(double));