Code tidy re-throwing of exceptions

Avoid copying exceptions.

libqpdf/NNTree.cc

@@ -899,7 +899,7 @@ NNTreeImpl::find(QPDFObjectHandle key, bool return_prev_if_not_found)
             repair();
             return findInternal(key, return_prev_if_not_found);
         } else {
-            throw e;
+            throw;
         }
     }
 }

libqpdf/QPDF.cc

@@ -500,7 +500,7 @@ QPDF::parse(char const* password)
             reconstruct_xref(e);
             QTC::TC("qpdf", "QPDF reconstructed xref table");
         } else {
-            throw e;
+            throw;
         }
     }
 
@@ -1483,7 +1483,7 @@ QPDF::readObject(
                     warn(e);
                     length = recoverStreamLength(input, og, stream_offset);
                 } else {
-                    throw e;
+                    throw;
                 }
             }
             object = newIndirect(
@@ -1684,7 +1684,7 @@ QPDF::readObjectAtOffset(
                 return QPDFObjectHandle::newNull();
             }
         } else {
-            throw e;
+            throw;
         }
     }
 

libqpdf/QPDFJob.cc

@@ -469,7 +469,7 @@ QPDFJob::createQPDF()
                 return nullptr;
             }
         }
-        throw e;
+        throw;
     }
     QPDF& pdf = *pdf_sp;
     if (pdf.isEncrypted()) {
@@ -1968,11 +1968,11 @@ QPDFJob::doProcess(
         try {
             doProcessOnce(pdf, fn, *iter, empty, used_for_input, main_input);
             return;
-        } catch (QPDFExc& e) {
+        } catch (QPDFExc&) {
             auto next = iter;
             ++next;
             if (next == passwords.end()) {
-                throw e;
+                throw;
             }
         }
         if (!warned) {