golang/go

html/template: default missingkey behavior does not match documentation

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#54,053 opened on Jul 25, 2022

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Description

What version of Go are you using (go version)?

Does this issue reproduce with the latest release?

Yes.

What did you do?

https://go.dev/play/p/i3N0a5PATuI

What did you expect to see?

<b><no value></b>

This would align with the documented behavior of Template.Option.

"missingkey=default" or "missingkey=invalid" The default behavior: Do nothing and continue execution. If printed, the result of the index operation is the string "".

This is what text/template outputs.

What did you see instead?

<b></b>

Contributor guide

Research direction
Compare the html/template and text/template implementations to find where the missingkey behavior diverges.
Tech stack
go
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Go
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75