use export LC_ALL=C.UTF-8

.travis.yml

@@ -18,7 +18,6 @@ env:
     - RUN_FUNCTIONAL_TESTS=true
     - RUN_BENCH=false  # Set to true for any one job that has debug enabled, to quickly check bench is not crashing or hitting assertions
     - DOCKER_NAME_TAG=ubuntu:18.04
-    - LC_ALL=C.UTF-8
     - BOOST_TEST_RANDOM=1$TRAVIS_BUILD_ID
     - CCACHE_SIZE=100M
     - CCACHE_TEMPDIR=/tmp/.ccache-temp

.travis/test_03_before_install.sh

@@ -4,7 +4,7 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-export LC_ALL=C
+export LC_ALL=C.UTF-8
 
 PATH=$(echo $PATH | tr ':' "\n" | sed '/\/opt\/python/d' | tr "\n" ":" | sed "s|::|:|g")
 export PATH

.travis/test_04_install.sh

@@ -4,7 +4,7 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-export LC_ALL=C
+export LC_ALL=C.UTF-8
 
 travis_retry docker pull "$DOCKER_NAME_TAG"
 env | grep -E '^(CCACHE_|WINEDEBUG|LC_ALL|BOOST_TEST_RANDOM|CONFIG_SHELL)' | tee /tmp/env

.travis/test_05_before_script.sh

@@ -4,7 +4,7 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-export LC_ALL=C
+export LC_ALL=C.UTF-8
 
 DOCKER_EXEC echo \> \$HOME/.bitcoin  # Make sure default datadir does not exist and is never read by creating a dummy file
 

.travis/test_06_script.sh

@@ -4,7 +4,7 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-export LC_ALL=C
+export LC_ALL=C.UTF-8
 
 TRAVIS_COMMIT_LOG=$(git log --format=fuller -1)
 export TRAVIS_COMMIT_LOG

test/lint/lint-shell-locale.sh

@@ -5,7 +5,8 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #
 # Make sure all shell scripts:
-# a.) explicitly opt out of locale dependence using "export LC_ALL=C", or
+# a.) explicitly opt out of locale dependence using
+#     "export LC_ALL=C" or "export LC_ALL=C.UTF-8", or
 # b.) explicitly opt in to locale dependence using the annotation below.
 
 export LC_ALL=C
@@ -16,7 +17,7 @@ for SHELL_SCRIPT in $(git ls-files -- "*.sh" | grep -vE "src/(secp256k1|univalue
         continue
     fi
     FIRST_NON_COMMENT_LINE=$(grep -vE '^(#.*|)$' "${SHELL_SCRIPT}" | head -1)
-    if [[ ${FIRST_NON_COMMENT_LINE} != "export LC_ALL=C" ]]; then
+    if [[ ${FIRST_NON_COMMENT_LINE} != "export LC_ALL=C" && ${FIRST_NON_COMMENT_LINE} != "export LC_ALL=C.UTF-8" ]]; then
         echo "Missing \"export LC_ALL=C\" (to avoid locale dependence) as first non-comment non-empty line in ${SHELL_SCRIPT}"
         EXIT_CODE=1
     fi