Debug test failures

tools/build_defs/repo/cache.bzl

@@ -35,6 +35,7 @@ machines without the file in the cache. This behavior can be disabled with
 """.format(env = NO_DEFAULT_CANONICAL_ID_ENV)
 
 def get_default_canonical_id(repository_ctx, urls):
+    print(repository_ctx.os.environ)
     """Returns the default canonical id to use for downloads."""
     if repository_ctx.os.environ.get(NO_DEFAULT_CANONICAL_ID_ENV) == "1":
         return ""
@@ -45,4 +46,5 @@ def get_default_canonical_id(repository_ctx, urls):
     # 3. Order of urls is flipped to [A, B].
     # 4. Fetch would reuse cache entry for "A B", even though A may be broken (it has never been
     #    fetched before).
+    print("Canonical ID: " + str(urls))
     return " ".join(urls)