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-rw-r--r--mesonbuild/build.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/mesonbuild/build.py b/mesonbuild/build.py
index 98fd764..dc19b73 100644
--- a/mesonbuild/build.py
+++ b/mesonbuild/build.py
@@ -1637,6 +1637,10 @@ class CustomTarget(Target):
for i in self.outputs:
if not(isinstance(i, str)):
raise InvalidArguments('Output argument not a string.')
+ if i == '':
+ raise InvalidArguments('Output must not be empty.')
+ if i.strip() == '':
+ raise InvalidArguments('Output must not consist only of whitespace.')
if '/' in i:
raise InvalidArguments('Output must not contain a path segment.')
if '@INPUT@' in i or '@INPUT0@' in i: