fix leaks in getFORMAT with vector<string>

test/Makefile

@@ -5,7 +5,7 @@ CXX      = g++
 CXXFLAGS = -std=c++11 -Wall -fsanitize=address
 # CXXFLAGS = -std=c++11 -Wall -g
 LDFLAGS  =  -L$(HTSLIB) -Wl,-rpath,$(HTSLIB)
-LIBS     = -lhts
+LIBS     = -lhts -lz -lm -lbz2 -llzma -lcurl -lpthread
 INC      = -I. -I.. -I${HTSINC}
 
 OBJS = test-main.o bcf-variant.o bcf-reader.o bcf-writer.o example.o

test/bcf-reader.cpp

@@ -122,3 +122,23 @@ TEST_CASE("parse vcf with multialleles - vector<int>", "[bcf-reader]")
     var.getGenotypes(gt);
     for(auto g : gt) cout << g << endl;
 }
+
+TEST_CASE("parse EV in vcf - vector<string>", "[bcf-reader]")
+{
+    string vcffile{"test-GL.vcf.gz"};
+    BcfWriter bw(vcffile, "VCF4.2");
+    bw.header.addContig("chr20"); 
+    bw.header.addINFO("AF", "A", "Float", "Estimated allele frequency in the range (0,1)");
+    bw.header.addFORMAT("GT", "1", "String", "Genotype");
+    bw.header.addFORMAT("EV", "G", "String", "Classes of evidence supporting final genotype");
+    for(auto & s : {"id01", "id02"}) bw.header.addSample(s); // add 3 samples
+    bw.writeLine("chr20\t2006060\trs146931526\tG\tA\t100\tPASS\tAF=0.02\tGT:EV\t0/1:RD\t1/1:SR,PE");
+    bw.close();
+    BcfReader br(vcffile);
+    BcfRecord var(br.header);
+    vector<string> ev;
+    REQUIRE(br.getNextVariant(var)==true);
+    var.getFORMAT("EV",ev);
+    REQUIRE(ev[0]=="RD");
+    REQUIRE(ev[1]=="SR,PE");
+}

vcfpp.h

@@ -2,7 +2,7 @@
  * @file        https://github.com/Zilong-Li/vcfpp/vcfpp.h
  * @author      Zilong Li
  * @email       [email protected]
- * @version     v0.3.7
+ * @version     v0.3.8
  * @breif       a single C++ file for manipulating VCF
  * Copyright (C) 2022-2023.The use of this code is governed by the LICENSE file.
  ******************************************************************************/
@@ -648,12 +648,12 @@ class BcfRecord
                 // Ugly: GT field is considered to be a string by the VCF header but BCF represents it as INT.
                 v.emplace_back(dst[i]);
             };
-            free(dst);
+            free(dst[0]); free(dst);
             return true;
         }
         else
         {
-            free(dst);
+            free(dst[0]); free(dst);
             throw std::runtime_error("couldn't parse the " + tag + " format of this variant.\n");
         }
     }