bitbake: cooker/siggen: Reset siggen when reparsing

If we don't do this, we get basehash mismatch errors occurring from the reparse
which would then set bitbake's error exit code.

This for example would cause oe-selftest -r bbtests.BitbakeTests.test_bbappend_order
to fail with a non-zero BB_SERVER_TIMEOUT.

(Bitbake rev: e4c6ca9440f63761560b49bbe12654441f54687e)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/cooker.py

@@ -1468,6 +1468,7 @@ class BBCooker:
             self.updateCacheSync()
 
         if self.state != state.parsing and not self.parsecache_valid:
+            bb.parse.siggen.reset(self.data)
             self.parseConfiguration ()
             if CookerFeatures.SEND_SANITYEVENTS in self.featureset:
                 for mc in self.multiconfigs:

bitbake/lib/bb/siggen.py

@@ -94,6 +94,9 @@ class SignatureGeneratorBasic(SignatureGenerator):
         else:
             self.checksum_cache = None
 
+    def reset(self, data):
+        self.__init__(data)
+
     def init_rundepcheck(self, data):
         self.taskwhitelist = data.getVar("BB_HASHTASK_WHITELIST") or None
         if self.taskwhitelist: