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-rw-r--r--src/engine/SCons/Builder.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/engine/SCons/Builder.py b/src/engine/SCons/Builder.py
index 47c9ad2..1f3c60d 100644
--- a/src/engine/SCons/Builder.py
+++ b/src/engine/SCons/Builder.py
@@ -311,7 +311,7 @@ def _init_nodes(builder, env, overrides, tlist, slist):
elif isinstance(t.builder, ListBuilder) ^ isinstance(builder, ListBuilder):
raise UserError, "Cannot build same target `%s' as singular and list"%str(t)
elif t.sources != slist:
- raise UserError, "Multiple ways to build the same target were specified for: %s" % str(t)
+ raise UserError, "Multiple ways to build the same target were specified for: %s (from %s and from %s)" % (str(t), map(str,t.sources), map(str,slist))
if builder.single_source:
if len(slist) > 1: