EC
TS6377
TypeScriptERRORNotableConfigHIGH confidence

Cannot write file 'X' because it will overwrite '.tsbuildinfo' file generated...

Production Risk

Build will fail; resolve before shipping.

What this means

A compiler configuration error (TS6377): Cannot write file 'X' because it will overwrite '.tsbuildinfo' file generated by referenced project 'X'. This diagnostic is emitted by the TypeScript compiler when cannot write file 'X' because it will overwrite '.tsbuildinfo' file generated by referenced project 'X'.

Why it happens
  1. 1Incorrect TypeScript syntax or type usage
  2. 2Type mismatch between declared and actual value
How to reproduce

TypeScript compiler reports TS6377 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS6377
// Cannot write file 'X' because it will overwrite '.tsbuildinfo' file generated by referenced project 'X'

expected output

error TS6377: Cannot write file 'X' because it will overwrite '.tsbuildinfo' file generated by referenced project 'X'

Fix

Fix the tsconfig.json option

WHEN When a compiler option is invalid or missing

Fix the tsconfig.json option
// tsconfig.json
{
  "compilerOptions": {
    // Review and correct the flagged option
  }
}
// Run: npx tsc --showConfig to see effective config

Why this works

TypeScript validates tsconfig.json options; check the official tsconfig reference for valid values.

Sources
Official documentation ↗

TypeScript Compiler Diagnostics

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