Bug Fix: When Spack create roots around for other versions, it sometimes finds files it thinks are tarballs, but are not. Previously, it would crash if any such files are found. This change allows it to simply skip them and move on, processing the rest of the files it finds correctly.

lib/spack/spack/cmd/checksum.py

@@ -58,24 +58,29 @@ def get_checksums(versions, urls, **kwargs):
 
     tty.msg("Downloading...")
     hashes = []
-    for i, (url, version) in enumerate(zip(urls, versions)):
+    i = 0
+    for url, version in zip(urls, versions):
         stage = Stage(url)
         try:
             stage.fetch()
             if i == 0 and first_stage_function:
                 first_stage_function(stage)
 
-            hashes.append(
-                spack.util.crypto.checksum(hashlib.md5, stage.archive_file))
+            hashes.append((version,
+                spack.util.crypto.checksum(hashlib.md5, stage.archive_file)))
         except FailedDownloadError, e:
             tty.msg("Failed to fetch %s" % url)
             continue
+	except Exception, e:
+            tty.msg('Something failed on %s, skipping.\n    (%s)' % (url, e))
+            continue
 
         finally:
             if not keep_stage:
                 stage.destroy()
+        i += 1
 
-    return zip(versions, hashes)
+    return hashes