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-rw-r--r--Lib/test/test_trace.py10
-rwxr-xr-xLib/trace.py2
2 files changed, 11 insertions, 1 deletions
diff --git a/Lib/test/test_trace.py b/Lib/test/test_trace.py
index 5f71211..fad2b3b 100644
--- a/Lib/test/test_trace.py
+++ b/Lib/test/test_trace.py
@@ -1,4 +1,5 @@
import os
+from pickle import dump
import sys
from test.support import captured_stdout
from test.support.os_helper import (TESTFN, rmtree, unlink)
@@ -412,6 +413,15 @@ class TestCoverage(unittest.TestCase):
self.assertIn(modname, coverage)
self.assertEqual(coverage[modname], (5, 100))
+ def test_coverageresults_update(self):
+ # Update empty CoverageResults with a non-empty infile.
+ infile = TESTFN + '-infile'
+ with open(infile, 'wb') as f:
+ dump(({}, {}, {'caller': 1}), f, protocol=1)
+ self.addCleanup(unlink, infile)
+ results = trace.CoverageResults({}, {}, infile, {})
+ self.assertEqual(results.callers, {'caller': 1})
+
### Tests that don't mess with sys.settrace and can be traced
### themselves TODO: Skip tests that do mess with sys.settrace when
### regrtest is invoked with -T option.
diff --git a/Lib/trace.py b/Lib/trace.py
index 2cf3643..213e465 100755
--- a/Lib/trace.py
+++ b/Lib/trace.py
@@ -172,7 +172,7 @@ class CoverageResults:
try:
with open(self.infile, 'rb') as f:
counts, calledfuncs, callers = pickle.load(f)
- self.update(self.__class__(counts, calledfuncs, callers))
+ self.update(self.__class__(counts, calledfuncs, callers=callers))
except (OSError, EOFError, ValueError) as err:
print(("Skipping counts file %r: %s"
% (self.infile, err)), file=sys.stderr)