Debug segfaults on travis

Fixes #2097

.travis.yml

@@ -73,6 +73,7 @@ before_install:
 
 install:
   - bash scripts/dev/ci/travis_install.sh
+  - ulimit -c unlimited
 
 script:
   - bash scripts/dev/ci/travis_run.sh
@@ -80,6 +81,9 @@ script:
 after_success:
   - '[[ $TESTENV == *-cov ]] && codecov -e TESTENV -X gcov'
 
+after_failure:
+  - bash scripts/dev/ci/travis_backtrace.sh
+
 notifications:
   webhooks:
     - https://buildtimetrend.herokuapp.com/travis

scripts/dev/ci/travis_backtrace.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+#
+#  Find all possible core files under current directory. Attempt
+#  to determine exe using file(1) and dump stack trace with gdb.
+#
+say () { printf "\033[91m%s\033[39m\n" "$@" >&2; }
+die () { say "$@"; exit 1; }
+
+find . -name *.core -o -name core | while read -r line; do
+    d=$(dirname $line)
+    f=$(basename $line)
+    exe=$(file $line | sed "s/.*from '\([^ \t]*\).*'.*/\1/")
+    ( cd $d &&
+      test -x $exe || die "Failed to find executable at $exe" &&
+      say "Found corefile for $exe" &&
+      gdb --batch --quiet -ex "thread apply all bt full" $exe $f
+    )
+done

scripts/dev/ci/travis_install.sh

@@ -113,11 +113,11 @@ tox --version
 case $TESTENV in
     py34-cov)
         pip_install -r misc/requirements/requirements-codecov.txt
-        apt_install xvfb $pyqt_pkgs libpython3.4-dev
+        apt_install xvfb $pyqt_pkgs libpython3.4-dev gdb apport
         check_pyqt
         ;;
     py3*-pyqt*)
-        apt_install xvfb geoclue
+        apt_install xvfb geoclue gdb apport
         ;;
     pylint|vulture)
         apt_install $pyqt_pkgs libpython3.4-dev