Fix panic on empty --json flag value#5498
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JsonFlag.Set indexed v[0] without a length check, so an empty value (for example from an unset shell variable) crashed the CLI with an index out of range panic. Return a validation error instead. Co-authored-by: Isaac
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Integration test reportCommit: 175c472
25 interesting tests: 15 SKIP, 7 KNOWN, 3 flaky
Top 50 slowest tests (at least 2 minutes):
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Co-authored-by: Isaac
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janniklasrose
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Jun 12, 2026
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consider a changelog entry albeit a minor bug fix
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Why
Found during a full-repo review of the CLI. Passing an empty value to
--json(for exampledatabricks jobs create --json=, or--json "$VAR"where the shell variable is unset) crashed the CLI with an index out of range panic instead of a usable error message.Changes
Before, an empty
--jsonvalue panicked; now it fails with a clean validation error.JsonFlag.Setinlibs/flags/json_flag.goindexedv[0]to check for the@fileprefix without first checking the length. It now rejects empty input up front, and cobra surfaces it asinvalid argument "" for "--json" flag: expected inline JSON or @path/to/file, got an empty string.Test plan
TestJsonFlagEmptyValuecovering the empty value case (panics without the fix, passes with it)go test ./libs/flagspasses./task fmt-q,./task lint-q, and./task checkspassThis pull request and its description were written by Isaac.