Microsoft/TypeScript

tsc won't compile newly added references in watch mode

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#47,799 opened on Feb 8, 2022

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BugDomain: tsc -bHelp Wanted

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Description

Bug Report

tsc won't compile newly added references in watch mode, while it compiles on initial start

I don't know if this description is clear :(
so i put an demonstration image in Steps to reproduce section

🔎 Search Terms

is:issue is:open references

🕗 Version & Regression Information

Typescript version : 4.5.5

⏯ Github repo

https://github.com/ryanroe/tsc-references-bug

💻 Steps to reproduce

  1. clone the repo
git clone https://github.com/ryanroe/tsc-references-bug
cd tsc-references-bug
npm install
npx tsc --build ./tsconfig.json -w
  1. open with Visual Studio Code (or any other editors) and remove the references field of root tsconfig.json
  2. save
  3. undo last operation (restore the references field)

tsc-references-bug

🙁 Actual behavior

tsc says the compilation is successful

Found 0 errors. Watching for file changes

🙂 Expected behavior

tsc should complain about the error of referenced project as initial start

error TS2304: Cannot find name 'a'.

BUT when i removed the files field of root tsconfig.json , everything works!

Contributor guide

Research direction
Examine how tsc watch mode detects changes to tsconfig.json's references field and compare with initial build behavior.
Tech stack
typescript
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.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitNode.js
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70