EC
TS6396
TypeScriptERRORNotableConfigHIGH confidence

Reusing resolution of type reference directive 'X' from 'X' found in cache fr...

Production Risk

Build will fail; resolve before shipping.

What this means

A compiler configuration error (TS6396): Reusing resolution of type reference directive 'X' from 'X' found in cache from location 'X', it was successfully resolved to 'X'.. This diagnostic is emitted by the TypeScript compiler when reusing resolution of type reference directive 'X' from 'X' found in cache from location 'X', it was successfully resolved to '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 TS6396 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS6396
// Reusing resolution of type reference directive 'X' from 'X' found in cache from location 'X', it was successfully resolved to 'X'.

expected output

error TS6396: Reusing resolution of type reference directive 'X' from 'X' found in cache from location 'X', it was successfully resolved to '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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