ci: export GOTRACEBACK=crash

.travis.yml

@@ -19,6 +19,7 @@ before_install:
    # Init() in main_test will make sure all backends are available if
    # GOPY_TRAVIS_CI is set
    - export GOPY_TRAVIS_CI=1
+   - export GOTRACEBACK=crash
    # make python output (sys.stdout, sys.stderr) unbuffered
    - export PYTHONUNBUFFERED=1
    # temporary workaround for go-python/gopy#83

appveyor.yml

@@ -14,6 +14,7 @@ environment:
   GOPATH: c:\gopath
   GOPY_APPVEYOR_CI: '1'
   GODEBUG: 'cgocheck=0'
+  GOTRACEBACK: 'crash'
   PYTHONUNBUFFERED: "1"
   CPYTHON2DIR: "C:\\Python27-x64"
   CPYTHON3DIR: "C:\\Python37-x64"