diff -Nru qttools-opensource-src-5.9.1/debian/changelog qttools-opensource-src-5.9.1/debian/changelog
--- qttools-opensource-src-5.9.1/debian/changelog	2017-07-02 13:08:50.000000000 +0000
+++ qttools-opensource-src-5.9.1/debian/changelog	2017-08-16 09:18:33.000000000 +0000
@@ -1,3 +1,11 @@
+qttools-opensource-src (5.9.1-2) unstable; urgency=medium
+
+  * Update symbols files from the current build logs.
+  * Upload to unstable.
+    - Fixes build failure with GCC 7 (closes: #853633).
+
+ -- Dmitry Shachnev <mitya57@debian.org>  Wed, 16 Aug 2017 12:18:33 +0300
+
 qttools-opensource-src (5.9.1-1) experimental; urgency=medium
 
   * New upstream release.
diff -Nru qttools-opensource-src-5.9.1/debian/libqt5designer5.symbols qttools-opensource-src-5.9.1/debian/libqt5designer5.symbols
--- qttools-opensource-src-5.9.1/debian/libqt5designer5.symbols	2017-07-02 13:08:50.000000000 +0000
+++ qttools-opensource-src-5.9.1/debian/libqt5designer5.symbols	2017-08-16 09:18:33.000000000 +0000
@@ -1,4 +1,4 @@
-# SymbolsHelper-Confirmed: 5.9.0 amd64 armel armhf i386 m68k powerpcspe
+# SymbolsHelper-Confirmed: 5.9.1 amd64 i386
 libQt5Designer.so.5 libqt5designer5 #MINVER#
 * Build-Depends-Package: qttools5-dev
  Qt_5.0@Qt_5.0 5.6.0~beta
@@ -3601,7 +3601,7 @@
  _ZNK9DomWidget5writeER16QXmlStreamWriterRK7QString@Qt_5 5.6.0~beta
  (optional=templinst)_ZNSt3_V28__rotateIPiEET_S2_S2_S2_St26random_access_iterator_tag@Qt_5 5.6.0~beta
  (optional=templinst|subst)_ZSt17__rotate_adaptiveIPiS0_{ssize_t}ET_S1_S1_S1_T1_S2_T0_S2_@Qt_5 5.6.0~beta
- (optional=templinst|arch=armel armhf i386 m68k powerpcspe)_ZSt4swapIN8QVariant7PrivateEENSt9enable_ifIXsrSt6__and_IJSt21is_move_constructibleIT_ESt18is_move_assignableIS5_EEE5valueEvE4typeERS5_SC_@Qt_5 5.9.0
+ (optional=templinst|arch=i386 powerpc)_ZSt4swapIN8QVariant7PrivateEENSt9enable_ifIXsrSt6__and_IJSt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS6_ESt18is_move_assignableIS6_EEE5valueEvE4typeERS6_SG_@Qt_5 5.9.1
  _ZTI12QFormBuilder@Qt_5 5.6.0~beta
  _ZTI12QTextBuilder@Qt_5 5.6.0~beta
  _ZTI13QDesignerMenu@Qt_5 5.6.0~beta
diff -Nru qttools-opensource-src-5.9.1/debian/libqt5designercomponents5.symbols qttools-opensource-src-5.9.1/debian/libqt5designercomponents5.symbols
--- qttools-opensource-src-5.9.1/debian/libqt5designercomponents5.symbols	2017-07-02 13:08:50.000000000 +0000
+++ qttools-opensource-src-5.9.1/debian/libqt5designercomponents5.symbols	2017-08-16 09:18:33.000000000 +0000
@@ -1,4 +1,4 @@
-# SymbolsHelper-Confirmed: 5.9.0 amd64 armel armhf i386 m68k powerpcspe
+# SymbolsHelper-Confirmed: 5.9.1 amd64 i386
 libQt5DesignerComponents.so.5 libqt5designercomponents5 #MINVER#
 * Build-Depends-Package: qttools5-private-dev
  Qt_5_PRIVATE_API@Qt_5_PRIVATE_API 5.6.0~beta
@@ -13,7 +13,7 @@
  _ZN19QDesignerComponents21createObjectInspectorEP28QDesignerFormEditorInterfaceP7QWidget@Qt_5_PRIVATE_API 5.6.0~beta
  _ZN19QDesignerComponents22createSignalSlotEditorEP28QDesignerFormEditorInterfaceP7QWidget@Qt_5_PRIVATE_API 5.6.0~beta
  (optional=templinst|arch=arm64 hppa sh4 x32)_ZN7QObject7connectIM16QDialogButtonBoxFvvEM7QDialogFvvEEEN11QMetaObject10ConnectionEPKN9QtPrivate15FunctionPointerIT_E6ObjectESB_PKNSA_IT0_E6ObjectESG_N2Qt14ConnectionTypeE@Qt_5_PRIVATE_API 5.6.0~rc
- (optional=templinst|arch=armel armhf i386 m68k powerpcspe)_ZSt4swapIN8QVariant7PrivateEENSt9enable_ifIXsrSt6__and_IJSt21is_move_constructibleIT_ESt18is_move_assignableIS5_EEE5valueEvE4typeERS5_SC_@Qt_5_PRIVATE_API 5.9.0
+ (optional=templinst|arch=i386 powerpc)_ZSt4swapIN8QVariant7PrivateEENSt9enable_ifIXsrSt6__and_IJSt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS6_ESt18is_move_assignableIS6_EEE5valueEvE4typeERS6_SG_@Qt_5_PRIVATE_API 5.9.1
  _ZTI29QDesignerOptionsPageInterface@Qt_5_PRIVATE_API 5.6.0~beta
  _ZTI34QDesignerFormEditorPluginInterface@Qt_5_PRIVATE_API 5.6.0~beta
  _ZTI34QDesignerFormWindowCursorInterface@Qt_5_PRIVATE_API 5.6.0~beta