Integration tests fail on CircleCI

[exarkun]

The integration job started to fail on master sometime between 2019-11-26T14:37:13+0000 and 2019-12-18T12:55:02+0000 (just now).

The failure was introduced with no changes to Tahoe-LAFS itself.

Failures can be seen, eg, here: ​https://circleci.com/gh/tahoe-lafs/tahoe-lafs/14991

[exarkun]

Dependencies in the test environment have changed versions between these two points in time (unfortunately). Here's a diff showing the changes:

-working
-=======
+broken
+======
@@ -12 +12 @@
-certifi==2019.9.11
+certifi==2019.11.28
@@ -19 +19 @@
-coverage==4.5.4
+coverage==5.0
@@ -34 +34 @@
-hypothesis==4.47.2
+hypothesis==4.55.3
@@ -36 +36 @@
-importlib-metadata==0.23
+importlib-metadata==1.3.0
@@ -45 +45 @@
-Nevow==0.14.4
+Nevow==0.14.5
@@ -61 +61 @@
-pytest==4.6.6
+pytest==4.6.7
@@ -66 +66 @@
-PyYAML==5.1.2
+PyYAML==5.2
@@ -70,0 +71 @@
+sortedcontainers==2.1.0
@@ -78,2 +79,2 @@
-tox==3.14.1
-tqdm==4.39.0
+tox==3.14.2
+tqdm==4.40.2
@@ -88 +89 @@
-virtualenv==16.7.8
+virtualenv==16.7.9

[exarkun]

Fixed in 94800b07df731b43fd12a52924f9b2af334cd8b1