Document function Actions and fix their return values (None == success, don't ignore failures).

1 files changed, 7 insertions, 4 deletions

diff --git a/src/engine/SCons/Node/__init__.py b/src/engine/SCons/Node/__init__.py
index b81f911..102b532 100644
--- a/src/engine/SCons/Node/__init__.py
+++ b/src/engine/SCons/Node/__init__.py
@@ -72,10 +72,13 @@ class Node:
         """Actually build the node.   Return the status from the build."""
 	if not self.builder:
 	    return None
-        stat = self.builder.execute(env = self.env.Dictionary(),
-                                    target = self, source = self.sources)
-	if stat != 0:
-	    raise BuildError(node = self, stat = stat)
+        try:
+            stat = self.builder.execute(env = self.env.Dictionary(),
+                                        target = self, source = self.sources)
+        except:
+            raise BuildError(node = self, errstr = "Exception")
+        if stat:
+            raise BuildError(node = self, errstr = "Error %d" % stat)
 
         # If we succesfully build a node, then we need to rescan for
         # implicit dependencies, since it might have changed on us.