Ticket #242 (new defect)

Opened 5 years ago

Last modified 3 years ago

ScannerError ("could not found expected ':'") on reading map keys longer than 1024 characters

Reported by: ed.brannin@… Owned by: xi
Priority: normal Component: pyyaml-legacy
Severity: normal Keywords:


I just got this error when reading a YAML map with a very long key:

    "could not found expected ':'", self.get_mark())
yaml.scanner.ScannerError: while scanning a simple key

If I delete the end of the key until it's 1024 characters long, it works.

(In this case, the keys in my map are SSH public keys for a Puppet manifest whose data I'm trying to export into YAML for easier editing.)


pyyaml_242.yaml Download (2.2 KB) - added by ed.brannin@… 5 years ago.
Example YAML input that causes the issue
pyyaml_242.py Download (2.5 KB) - added by ed.brannin@… 5 years ago.
PyYAML Test program that displays the issue

Change History

Changed 5 years ago by ed.brannin@…

Example YAML input that causes the issue

Changed 5 years ago by ed.brannin@…

PyYAML Test program that displays the issue

comment:1 Changed 5 years ago by ed.brannin@…

I've attached a sample YAML file and Python script that demonstrate the issue. To see that key length is the issue, delete the end of THIS_IS_A_VERY_LONG_KEY from the start of "START_DELETING_HERE_".

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  • Component changed from pyyaml to pyyaml-legacy

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The second issue is that the emitter escapes non-ASCII characters even when all characters are printable (according to 'c-printable' in the YAML spec) when using an encoding (UTF8) that supports such characters. I don't find this as elegant as could be. Instead of the "Fran\xE7ais" output above, I would have hoped for the UTF8-encoded byte string Fran\xc3\xa7ais\n.

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