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authorEelco Dolstra <eelco.dolstra@logicblox.com>2012-12-18T17·50+0100
committerEelco Dolstra <eelco.dolstra@logicblox.com>2012-12-18T17·50+0100
commitcc511fd65b7b6de9e87e72fb4bed16fc7efeb8b7 (patch)
treebc6516bf7eed17a5d8ce9c04fd5334dca82daa9a /src/libstore/build.cc
parenta9045c727fab1cdcc530bc18e651334cf892d62c (diff)
Check for potential infinite select() loops when building
Diffstat (limited to 'src/libstore/build.cc')
-rw-r--r--src/libstore/build.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index ce87eaed2f31..035151bb265e 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -3141,6 +3141,8 @@ void Worker::waitForInput()
         }
     }
 
+    assert(fdMax != 0);
+
     if (select(fdMax, &fds, 0, 0, useTimeout ? &timeout : 0) == -1) {
         if (errno == EINTR) return;
         throw SysError("waiting for input");