this should error because of writing to /data

.travis.yml

@@ -4,7 +4,7 @@ services:
   - docker
 
 install:
-  - docker build -t tmppilot -f Dockerfile.openpilot .
+  - travis_wait 30 docker build -t tmppilot -f Dockerfile.openpilot .
 
 script:
   - docker run

Dockerfile.openpilot

@@ -21,6 +21,7 @@ RUN apt-get update && apt-get install -y \
     ocl-icd-opencl-dev \
     opencl-headers
 
+RUN pip install --upgrade pip
 RUN pip install numpy==1.11.2 scipy==0.18.1 matplotlib==2.1.2
 
 COPY requirements_openpilot.txt /tmp/

selfdrive/controls/lib/longcontrol.py

@@ -106,15 +106,20 @@ def dynamic_gas(self, v_ego, v_rel, d_rel, gasinterceptor, gasbuttonstatus):
     accel = interp(v_ego, x, y)
 
     if dynamic and v_rel is not None:  # dynamic gas profile specific operations, and if lead
-      if (v_ego) < 6.7056:  # if under 15 mph
+      with open("/data/long_vrel", "a") as f:
+        f.write(str(v_rel)+"\n")
+      if v_ego < 6.7056:  # if under 15 mph
         x = [1.61479, 1.99067, 2.28537, 2.49888, 2.6312, 2.68224]
         y = [-accel, -(accel / 1.06), -(accel / 1.2), -(accel / 1.8), -(accel / 4.4), 0]  # array that matches current chosen accel value
         accel += interp(v_rel, x, y)
+        with open("/data/long_accel", "a") as f:
+          f.write(str(accel)+"\n")
       else:
         x = [-0.89408, 0, 0.89408, 4.4704]
         y = [-.15, -.05, .005, .05]
         accel += interp(v_rel, x, y)
-
+        with open("/data/long_accel", "a") as f:
+          f.write(str(accel)+"\n")
 
     min_return = 0.0
     max_return = 1.0
@@ -138,6 +143,9 @@ def update(self, active, v_ego, brake_pressed, standstill, cruise_standstill, v_
       vRel = None
       dRel = None
 
+    with open("/data/long_test", "a") as f:
+      f.write(str(vRel)+"\n")
+
     #gas_max = interp(v_ego, CP.gasMaxBP, CP.gasMaxV)
     gas_max = self.dynamic_gas(v_ego, vRel, dRel, gasinterceptor, gasbuttonstatus)
     brake_max = interp(v_ego, CP.brakeMaxBP, CP.brakeMaxV)