Include 'enableGenericMethods' into salt.

pkg/analyzer/lib/src/dart/analysis/driver.dart

Index: pkg/analyzer/lib/src/dart/analysis/driver.dart
diff --git a/pkg/analyzer/lib/src/dart/analysis/driver.dart b/pkg/analyzer/lib/src/dart/analysis/driver.dart
index ee355c454854ac61277e113963616698cd569a26..0f2b947b9e7c0108cdff72d3460bea8b92ddf615 100644
--- a/pkg/analyzer/lib/src/dart/analysis/driver.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/driver.dart
@@ -631,6 +631,7 @@ class AnalysisDriver {
   void _fillSalt() {
     int analysisOptionsSalt = 0;
     analysisOptionsSalt |= _analysisOptions.strongMode ? (1 << 0) : 0;
+    analysisOptionsSalt |= _analysisOptions.enableGenericMethods ? (1 << 1) : 0;

[Brian Wilkerson, 2016/11/08 21:15:08]

Have you looked at AnalysisOptionsImpl.encodeCrossContextOptions()? There are
several other options that affect analysis, and there's already an encoding for
them.

[scheglov, 2016/11/09 01:21:38]

Done.

     _salt[0] = DATA_VERSION;
     _salt[1] = analysisOptionsSalt;
   }