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Untested compiler error and warning variants

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维护者通常 1 天内回复

还没有人认领这个 Issue。

评估

难度
5/5
预计耗时
一周以上
新手友好度
35/100
Issue 类型
功能
描述清晰度
基本清楚
活跃度
活跃
技术栈
javascript
领域
testing

调研方向

Start with tests/ERROR_VARIANTS.md and the super_errors harnesses it describes. The issue lists compiler error and warning variants that lack test coverage, along with the obstacles found for reproducing them. Determine which entries can be covered by fixtures or need a different harness, then add tests where reachable and document any dead-code candidates; done means the useful catalog findings are preserved and the test gaps are addressed.

由索引模型根据 Issue 内容生成。

描述

tests/ERROR_VARIANTS.md is being removed. This issue keeps the useful part: the compiler error and warning variants that no test exercises. For each one it records what the catalog found about reaching it.

Possibly a bug

  • Syntaxerr.Variable_in_scope: reachable via let f: type t. (t, 't) => t = …, but Syntaxerr.error has no registered printer, so it escapes as Fatal error: exception Syntaxerr.Error(_). It needs a printer, or should become a regular typed diagnostic.

Reachability unknown

Sites are live, but no source reproduction has been found. Each of these either needs a fixture or is a dead-code candidate.

  • typedecl.Cycle_in_def: recursive_type_abbrev_cycle.res reports Recursive_abbrev instead.
  • typedecl.Rebind_mismatch: the shape check after Rebind_wrong_type.
  • typedecl.Type_clash: marked "appears dead" in the source.
  • typemod.With_makes_applicative_functor_ill_typed (check_usage_of_path_of_substituted_item): attempts hit not a signature first.
  • typemod.Cannot_eliminate_dependency (Pmod_apply in type_module_aux): attempts hit Incomplete_packed_module or escapes its scope.
  • typemod.Scoping_pack (type_package): attempts hit Incomplete_packed_module.
  • Warning 5 Partial_application (check_application_result): no reproduction found.

Reachable, but not from the super_errors harnesses

Needs a per-fixture flag
  • typecore.Jsx_not_enabled: the runner hard-codes -bs-jsx 4.
  • typecore.Invalid_string_escape_sequence: the parser rejects such source first, so only a PPX can produce the AST.
Needs missing or stale build state
  • typedecl.Unavailable_type_constructor
  • typemod.With_changes_module_alias
  • typemod.Cannot_scrape_alias
  • typetexp.Cannot_scrape_alias
  • includemod.Unbound_modtype_path
  • includemod.Unbound_module_path
  • includemod.Invalid_module_alias
  • bs_exception.Cmj_not_found
  • bs_exception.Missing_ml_dependency
  • bs_exception.Dependency_script_module_dependent_not: a script-mode dependency used from package mode.
  • env.Illegal_renaming
  • env.Inconsistent_import
  • env.Missing_module
  • Warning 49 No_cmi_file
Needs corrupt or foreign binary files
  • cmi_format.Not_an_interface
  • cmi_format.Wrong_version_interface
  • cmi_format.Corrupted_interface
  • cmt_format_common.Not_a_typedtree
  • cmd_ast_exception.WrongMagic: a PPX returns the wrong AST magic number.
Needs custom argv
  • bsc_args.Unknown (bsc --bogus)
  • bsc_args.Missing (bsc -o)

Reachable from plain source

  • Warning 27 Unused_var_strict: no expected output shows it.
主要语言
ReScript
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从这里开始

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  3. Fork 仓库，在一个分支上完成修改。
  4. 提交 Pull Request，并在描述里引用这个 Issue 编号。

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