travis fix?

.travis.yml

@@ -31,14 +31,15 @@ addons: &clang35
       - llvm-toolchain-precise-3.5
       
 
-addons: &clang90
+addons: &clang100
 apt:
   sources:
     - ubuntu-toolchain-r-test
-    - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-9 main'
+    - deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-10 main
+    - sourceline: 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-10 main'
       key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
   packages:
-    - clang-9
+    - clang-10
 
 
 
@@ -69,12 +70,14 @@ matrix:
       # Test clang-9.0: C++11, Build=Debug, ASAN=On
     - env: CLANG_VERSION=9 BUILD_TYPE=Debug CPP=11 ASAN=On TSAN=Off
       os: linux
-      addons: *clang90
+      dist: bionic
+      addons: *clang100
 
     # Test clang-9.0: C++11, Build=Release, ASAN=Off
-    - env: CLANG_VERSION=9 BUILD_TYPE=Release CPP=11 ASAN=On TSAN=Off
+    - env: CLANG_VERSION=10 BUILD_TYPE=Release CPP=11 ASAN=On TSAN=Off
       os: linux
-      addons: *clang90
+      dist: bionic
+      addons: *clang900
 
       
       # osx