1 files changed, 22 insertions, 0 deletions
diff --git a/fix-for-gcc81.patch b/fix-for-gcc81.patch
new file mode 100644
index 000000000000..e47336dc21ca
--- /dev/null
+++ b/fix-for-gcc81.patch
@@ -0,0 +1,22 @@
+diff --git a/src/prediction/zero_query_dict.h b/src/prediction/zero_query_dict.h
+index c11aa24d..4eece4eb 100644
+--- a/src/prediction/zero_query_dict.h
++++ b/src/prediction/zero_query_dict.h
+@@ -132,6 +132,17 @@ class ZeroQueryDict {
+       return tmp;
+     }
+ 
++    iterator &operator--() {
++      ptr_ -= kTokenByteSize;
++      return *this;
++    }
++
++    iterator operator--(int) {
++      const iterator tmp(ptr_, string_array_);
++      ptr_ -= kTokenByteSize;
++      return tmp;
++    }
++
+     iterator &operator+=(ptrdiff_t n) {
+       ptr_ += n * kTokenByteSize;
+       return *this;