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-rwxr-xr-xtools/lib/python/jobserver.py7
1 files changed, 6 insertions, 1 deletions
diff --git a/tools/lib/python/jobserver.py b/tools/lib/python/jobserver.py
index a24f30ef4fa8..616411087725 100755
--- a/tools/lib/python/jobserver.py
+++ b/tools/lib/python/jobserver.py
@@ -91,6 +91,10 @@ class JobserverExec:
while True:
try:
slot = os.read(self.reader, 8)
+ if not slot:
+ # Clear self.jobs to prevent us from probably writing incorrect file.
+ self.jobs = b""
+ raise ValueError("unexpected empty token from jobserver fd, invalid '--jobserver-auth=' setting?")
self.jobs += slot
except (OSError, IOError) as e:
if e.errno == errno.EWOULDBLOCK:
@@ -105,7 +109,8 @@ class JobserverExec:
# to sit here blocked on our child.
self.claim = len(self.jobs) + 1
- except (KeyError, IndexError, ValueError, OSError, IOError):
+ except (KeyError, IndexError, ValueError, OSError, IOError) as e:
+ print(f"jobserver: warning: {repr(e)}", file=sys.stderr)
# Any missing environment strings or bad fds should result in just
# not being parallel.
self.claim = None