Diagnosing YAML Parser Mapping Values Errors

YAML parser mapping values not allowed diagnosis in deployment

0 reputation · 12 May 2021, 04:40 UTC

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Goal is to diagnose deployment failures attributed to YAML parsing of complex structures with anchors, aliases, block scalars, and ambiguous scalar types.

Constraints include whitespace sensitivity, tab versus space handling, parser differences between YAML 1.1 and 1.2 for booleans and nulls, and differing handling of duplicate keys at the same mapping level. Uncertainty remains about how alias resolution order interacts with structural errors and how type casting of strings like 'no' or 'off' manifests in diagnostics.

How do YAML 1.1 and 1.2 parsers report duplicate keys within the same mapping? What distinguishes a syntax error from an unexpected type cast in parser diagnostics?

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YAML parser mapping values not allowed diagnosis in deployment

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