job.sh: fix ERR trap in semicolon commands

Turn on `set -e` so that if `cmd1` fails in a `cmd1; cmd2` syntax, the
failure is trapped.

lib/cylc/job.sh

@@ -53,8 +53,7 @@ cylc__job__main() {
     for signal_name in ${CYLC_VACATION_SIGNALS:-}; do
         trap "cylc__job__trap_vacation ${signal_name}" "${signal_name}"
     done
-    set -u
-    set -o pipefail
+    set -euo pipefail
     # Export CYLC_ suite and task environment variables
     cylc__job__inst__cylc_env
     # Write task job self-identify

tests/api-suite-info/03-get-graph-raw-4/suite.rc

@@ -1,4 +1,5 @@
 [cylc]
+   UTC mode = True
    [[reference test]]
        required run mode = live
        live mode suite timeout = PT30S

tests/job-file-trap/02-pipefail.t

@@ -30,7 +30,6 @@ suite_run_fail "${TEST_NAME_BASE}-run" \
 T1_STATUS_FILE="${SUITE_RUN_DIR}/log/job/1/t1/01/job.status"
 contains_ok "${T1_STATUS_FILE}" <<'__STATUS__'
 CYLC_JOB_EXIT=EXIT
-CYLC_JOB_EXIT=ERR
 __STATUS__
 
 purge_suite "${SUITE_NAME}"

tests/jobscript/12-err-script.t

@@ -22,7 +22,7 @@ set_test_number 4
 install_suite "${TEST_NAME_BASE}" "${TEST_NAME_BASE}"
 run_ok "${TEST_NAME_BASE}-validate" cylc validate "${SUITE_NAME}"
 run_ok "${TEST_NAME_BASE}-run" cylc run "${SUITE_NAME}" --reference-test --debug
-grep_ok 'ERR foo bar baz qux' "${SUITE_RUN_DIR}/log/job/1/foo/01/job.err"
+grep_ok 'EXIT foo bar baz qux' "${SUITE_RUN_DIR}/log/job/1/foo/01/job.err"
 run_fail "${TEST_NAME_BASE}-grep-02" \
     grep -q -F 'ERR foo bar baz qux' "${SUITE_RUN_DIR}/log/job/1/foo/02/job.err"
 

tests/jobscript/15-semicolon.t

@@ -0,0 +1,28 @@
+#!/bin/bash
+# THIS FILE IS PART OF THE CYLC SUITE ENGINE.
+# Copyright (C) 2008-2017 NIWA
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#-------------------------------------------------------------------------------
+# Test error trapping in cmd1; cmd2 syntax. If cmd1 fails, the error trap
+# should trigger.
+. "$(dirname "${0}")/test_header"
+set_test_number 2
+
+install_suite "${TEST_NAME_BASE}" "${TEST_NAME_BASE}"
+run_ok "${TEST_NAME_BASE}-validate" cylc validate "${SUITE_NAME}"
+run_ok "${TEST_NAME_BASE}-run" cylc run "${SUITE_NAME}" --reference-test --debug
+
+purge_suite "${SUITE_NAME}"
+exit

tests/jobscript/15-semicolon/reference.log

@@ -0,0 +1,4 @@
+2017-02-09T16:45:37Z INFO - Initial point: 1
+2017-02-09T16:45:37Z INFO - Final point: 1
+2017-02-09T16:45:37Z INFO - [foo.1] -triggered off []
+2017-02-09T16:45:37Z INFO - [foo.1] -triggered off []

tests/jobscript/15-semicolon/suite.rc

@@ -0,0 +1,17 @@
+[cylc]
+    [[reference test]]
+        expected task failures = foo.1
+    [[events]]
+        abort on stalled = True
+[scheduling]
+    [[dependencies]]
+        graph = foo
+[runtime]
+    [[foo]]
+        script = """
+if ((${CYLC_TASK_SUBMIT_NUMBER} == 1)); then
+    false; true
+fi
+"""
+        [[[job]]]
+            execution retry delays = PT0S