ofz#9597 rethrown IOException not caught by catch IOException

under google oss-fuzz, asan + clang version 6.0.0 (trunk 315613)

when using our own exception thrower, but builtin C++11 support works

also, ofz#9266, ofz#9591, ofz#9597, ofz#9622, etc

Change-Id: I29c692da880b49268284de2f61be07fa94f33bc6
Reviewed-on: https://gerrit.libreoffice.org/58223
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

package/source/zipapi/XBufferedThreadedStream.cxx

@@ -32,7 +32,7 @@ private:
         catch (const css::uno::Exception &e)
         {
             SAL_WARN("package", "Unexpected " << e );
-            mxStream.saveException(cppu::getCaughtException());
+            mxStream.saveException(std::current_exception());
         }
 
         mxStream.setTerminateThread();
@@ -107,8 +107,8 @@ const Buffer& XBufferedThreadedStream::getNextBlock()
         if( maPendingBuffers.empty() )
         {
             maInUseBuffer = Buffer();
-            if (maSavedException.hasValue())
-                cppu::throwException(maSavedException);
+            if (maSavedException)
+                std::rethrow_exception(maSavedException);
         }
         else
         {

package/source/zipapi/XBufferedThreadedStream.hxx

@@ -37,7 +37,7 @@ private:
     std::condition_variable maBufferProduceResume;
     bool mbTerminateThread;                                 /// indicates the failure of one of the threads
 
-    css::uno::Any maSavedException;                         /// exception caught during unzipping is saved to be thrown during reading
+    std::exception_ptr maSavedException;                    /// exception caught during unzipping is saved to be thrown during reading
 
     static const size_t nBufferLowWater = 2;
     static const size_t nBufferHighWater = 4;
@@ -66,7 +66,7 @@ public:
 
     void produce();
     void setTerminateThread();
-    void saveException(const css::uno::Any &rAny) { maSavedException = rAny; }
+    void saveException(std::exception_ptr exception) { maSavedException = exception; }
 
     // XInputStream
     virtual sal_Int32 SAL_CALL readBytes( css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead ) override;