fix some unlikely memory leaks in error cases

The error cases are just as unlikely as the memory leaks to ever cause
real problems, but lets play it safe for correctness.

Reported-By: scan-build & clang
Gbp-Dch: Ignore

1 files changed, 8 insertions, 25 deletions

diff --git a/apt-pkg/deb/debindexfile.cc b/apt-pkg/deb/debindexfile.cc
index c55847305..799144ecb 100644
--- a/apt-pkg/deb/debindexfile.cc
+++ b/apt-pkg/deb/debindexfile.cc
@@ -26,6 +26,7 @@
 
 #include <stdio.h>
 #include <iostream>
+#include <memory>
 #include <string>
 #include <sstream>
 
@@ -66,7 +67,7 @@ bool debSourcesIndex::OpenListFile(FileFd &, std::string const &)
 }
 pkgCacheListParser * debSourcesIndex::CreateListParser(FileFd &)
 {
-   return NULL;
+   return nullptr;
 }
 uint8_t debSourcesIndex::GetIndexFlags() const
 {
@@ -128,16 +129,10 @@ pkgCacheListParser * debTranslationsIndex::CreateListParser(FileFd &Pkg)
    if (Pkg.IsOpen() == false)
       return nullptr;
    _error->PushToStack();
-   pkgCacheListParser * const Parser = new debTranslationsParser(&Pkg);
+   std::unique_ptr<pkgCacheListParser> Parser(new debTranslationsParser(&Pkg));
    bool const newError = _error->PendingError();
    _error->MergeWithStack();
-   if (newError)
-   {
-      delete Parser;
-      return nullptr;
-   }
-   else
-      return Parser;
+   return newError ? nullptr : Parser.release();
 }
 									/*}}}*/
 // dpkg/status Index							/*{{{*/
@@ -162,16 +157,10 @@ pkgCacheListParser * debStatusIndex::CreateListParser(FileFd &Pkg)
    if (Pkg.IsOpen() == false)
       return nullptr;
    _error->PushToStack();
-   pkgCacheListParser * const Parser = new debStatusListParser(&Pkg);
+   std::unique_ptr<pkgCacheListParser> Parser(new debStatusListParser(&Pkg));
    bool const newError = _error->PendingError();
    _error->MergeWithStack();
-   if (newError)
-   {
-      delete Parser;
-      return nullptr;
-   }
-   else
-      return Parser;
+   return newError ? nullptr : Parser.release();
 }
 									/*}}}*/
 // DebPkgFile Index - a single .deb file as an index			/*{{{*/
@@ -244,16 +233,10 @@ pkgCacheListParser * debDebPkgFileIndex::CreateListParser(FileFd &Pkg)
    if (Pkg.IsOpen() == false)
       return nullptr;
    _error->PushToStack();
-   pkgCacheListParser * const Parser = new debDebFileParser(&Pkg, DebFile);
+   std::unique_ptr<pkgCacheListParser> Parser(new debDebFileParser(&Pkg, DebFile));
    bool const newError = _error->PendingError();
    _error->MergeWithStack();
-   if (newError)
-   {
-      delete Parser;
-      return nullptr;
-   }
-   else
-      return Parser;
+   return newError ? nullptr : Parser.release();
 }
 uint8_t debDebPkgFileIndex::GetIndexFlags() const
 {