make check will segfault most times with this minimal code

test/read_bam_file.d

@@ -35,55 +35,18 @@ import std.exception;
 import std.math;
 import std.typetuple;
 import std.regex;
+import core.memory;
 
 void main() {
-
-  auto bam = new BamReader("test/data/ex1_header.bam");
-  auto reads = bam["chr2"][150 .. 160]; // region chr2:149-158
-  auto pileup = makePileup(reads,
-                           false,     // reads don't contain MD tags
-                           155, 158); // specify [start, end) interval
-
+  BamReader bam;
+  auto fn = buildPath(dirName(__FILE__), "data", "ex1_header.bam");
+  foreach (i; 0 .. 60)
   {
-    auto fn = buildPath(dirName(__FILE__), "data", "b.sam");
-    auto sam = new SamReader(fn);
-    auto writer = new BamWriter("/dev/null", 0);
-    writer.writeSamHeader(sam.header);
-    writer.writeReferenceSequenceInfo(sam.reference_sequences);
-    foreach (r; sam.reads)
-      writer.writeRecord(r);
-    writer.finish();
+    bam = new BamReader(fn);
+    assert(bam.header.format_version == "1.3");
   }
-  {
-    auto fn = buildPath(dirName(__FILE__), "data", "bins.bam");
-    auto bf = new BamReader(fn);
-  }
-  import core.memory;
-  stderr.writeln("**** Calling GC");
-  GC.collect();
-  stderr.writeln("**** Past calling GC");
-  {
-
-    auto fn = buildPath(dirName(__FILE__), "data", "ex1_header.bam");
-    auto bf = new BamReader(fn);
-    assert(bf.header.format_version == "1.3");
-    assert(bf.header.sorting_order == SortingOrder.coordinate);
-    assert(bf.header.sequences.length == 2);
-    assert(bf.header.getSequenceIndex("chr1") == 0);
-    assert(bf.header.sequences["chr2"].length == 1584);
-
-    auto fn2 = buildPath(dirName(__FILE__), "data", "bins.bam");
-    auto bf2 = new BamReader(fn2);
-    assert(bf2.header.sorting_order == SortingOrder.unknown);
-    assert(bf2.header.sequences.length == 3);
-    assert(bf2.header.read_groups.length == 0);
-    assert(bf2.header.getSequenceIndex("large") == 2);
-    assert(bf2.header.sequences["small"].length == 65536);
-  }
-
   // Time to kick in GC
-  import core.memory;
-  stderr.writeln("**** Calling GC");
-  GC.collect();
-  stderr.writeln("**** Past calling GC");
+  // stderr.writeln("**** Calling GC final");
+  // GC.collect();
+  // stderr.writeln("**** Past calling GC final");
 }