r26 B

R — Intentionally Invalid

Intentionally invalid R (unclosed call) for parser tests.

Error handling Code parsing Editor testing

Preview, first 2 linesr

df <- data.frame(id = 1:3

Specifications

Language: r
Role: intentionally invalid
Valid: false

Testing contract

Expected to fail

Scenario: Parse the file with a R parser or compiler and inspect the diagnostic.
Expected result: Parsing fails because the `data.frame(` call is never closed; `parse()` must raise an unexpected-end-of-input error; an interactive REPL instead sits at a continuation prompt, which is the behaviour difference this fixture exposes. The file is 26 bytes over 1 lines, so the whole defect is visible at once and the reported position can be checked exactly.

What is a .r file?

R (.r / .R) source files contain scripts for the R statistical computing language, including data frames and tidy pipelines.

How to use this file

Use example .r files to test R language servers, highlighters, and script runners against small deterministic samples.

How to use this file for testing

“R — Intentionally Invalid” is a deterministic Novus Examples fixture for Error handling, Code parsing, Editor testing. Deliberately corrupt and invalid files, clearly labelled, for testing how your tool fails.

Documented properties for this file: intentionally invalid · r · intentionally invalid. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.

Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such, expect parsers to fail loudly rather than silently accept them.

This is a short, known-correct source file. Run it through your syntax highlighter, linter, formatter, tree-sitter grammar, or parser, and open it in the in-browser editor to tweak and re-download. Each snippet exercises comments, string escapes, literals, and language keywords.