hs23 B

Haskell — Intentionally Invalid

Intentionally invalid Haskell (unterminated string) for parser failure tests.

Error handling Code parsing Editor testing

Preview, first 2 lineshs

main = putStrLn "hello

Specifications

Language: haskell
Role: intentionally invalid
Valid: false

Testing contract

Expected to fail

Scenario: Parse the file with a Haskell parser or compiler and inspect the diagnostic.
Expected result: Parsing fails because the string literal opened after `putStrLn` is never closed - the file holds an odd number of double quotes; the lexer must report an unterminated string literal, not a newline inside a string. The file is 23 bytes over 1 lines, so the whole defect is visible at once and the reported position can be checked exactly.

What is a .hs file?

Haskell (.hs) source files contain programs in the pure functional Haskell language, typically compiled with GHC.

How to use this file

Use example .hs files to exercise Haskell highlighters, HLS, and parsers on idiomatic hello-world and fold/Maybe snippets.

How to use this file for testing

“Haskell — 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 · haskell · 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.