std::map from std::initializer_list is "explicit".

apt-pkg/deb/debmetaindex.h

@@ -34,8 +34,8 @@ class APT_HIDDEN debReleaseIndex : public metaIndex
    APT_HIDDEN std::string MetaIndexFile(const char *Types) const;
    APT_HIDDEN std::string MetaIndexURI(const char *Type) const;
 
-   debReleaseIndex(std::string const &URI, std::string const &Dist, std::map<std::string,std::string> const &Options);
-   debReleaseIndex(std::string const &URI, std::string const &Dist, bool const Trusted, std::map<std::string,std::string> const &Options);
+   debReleaseIndex(std::string const &URI, std::string const &Dist, std::map<std::string,std::string> const &Options = std::map<std::string,std::string>());
+   debReleaseIndex(std::string const &URI, std::string const &Dist, bool const Trusted, std::map<std::string,std::string> const &Options = std::map<std::string,std::string>());
    virtual ~debReleaseIndex();
 
    virtual std::string ArchiveURI(std::string const &File) const APT_OVERRIDE {return URI + File;};

apt-pkg/indexcopy.cc

@@ -550,7 +550,7 @@ bool SigVerify::CopyAndVerify(string CDROM,string Name,vector<string> &SigList,
       if(Debug)
 	 cout << "Signature verify for: " << *I << endl;
 
-      metaIndex *MetaIndex = new debReleaseIndex("","", {});
+      metaIndex *MetaIndex = new debReleaseIndex("","");
       string prefix = *I; 
 
       string const releasegpg = *I+"Release.gpg";