Don't crash if we fail to get the flutter or engine revision (#6332)

cedbfd48 · Todd Volkert · GitHub · 93d757c3 · cedbfd48
Commit cedbfd48 authored Oct 14, 2016 by Todd Volkert Committed by GitHub Oct 14, 2016
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version.dart packages/flutter_tools/lib/src/version.dart +2 -0

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--- a/packages/flutter_tools/lib/src/version.dart
+++ b/packages/flutter_tools/lib/src/version.dart
@@ -107,5 +107,7 @@ String _runSync(String executable, List<String> arguments, String cwd) {
 }

 String _shortGitRevision(String revision) {
+  if (revision == null)
+    return '';
  return revision.length > 10 ? revision.substring(0, 10) : revision;
 }