microsoft · DanielRosenwasser · Feb 20, 2024 · Feb 20, 2024 · Feb 20, 2024 · Feb 20, 2024
diff --git a/package.json b/package.json
@@ -2,7 +2,7 @@
     "name": "typescript",
     "author": "Microsoft Corp.",
     "homepage": "https://www.typescriptlang.org/",
-    "version": "5.4.0",
+    "version": "5.5.0",
     "license": "Apache-2.0",
     "description": "TypeScript is a language for application scale JavaScript development",
     "keywords": [

diff --git a/src/compiler/corePublic.ts b/src/compiler/corePublic.ts
@@ -1,6 +1,6 @@
 // WARNING: The script `configurePrerelease.ts` uses a regexp to parse out these values.
 // If changing the text in this section, be sure to test `configurePrerelease` too.
-export const versionMajorMinor = "5.4";
+export const versionMajorMinor = "5.5";
 // The following is baselined as a literal template type without intervention
 /** The version of the TypeScript compiler release */
 // eslint-disable-next-line @typescript-eslint/no-inferrable-types

diff --git a/src/testRunner/unittests/tsserver/projectReferences.ts b/src/testRunner/unittests/tsserver/projectReferences.ts
@@ -115,7 +115,14 @@ describe("unittests:: tsserver:: with project references and tsbuild", () => {
             };
             const files = [libFile, containerLibConfig, containerLibIndex, containerExecConfig, containerExecIndex, containerCompositeExecConfig, containerCompositeExecIndex, containerConfig];
             if (tempFile) files.push(tempFile);
-            const host = createHostWithSolutionBuild(files, [containerConfig.path]);
+
+            const rootNames = [containerConfig.path];
+            const host = createServerHost(files);
+            // Can't use createHostWithSolutionBuild. This test used to work,
+            // but no longer does since prepend isn't allowed in project references.
+            // We just baseline and assert nothing about the output.
+            solutionBuildWithBaseline(host, rootNames);
+
             const session = new TestSession(host);
             return { files, session, containerConfig, containerCompositeExecIndex };
         }

diff --git a/tests/baselines/reference/ES3For-ofTypeCheck1.errors.txt b/tests/baselines/reference/ES3For-ofTypeCheck1.errors.txt
@@ -1,8 +1,8 @@
-error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 ES3For-ofTypeCheck1.ts(1,15): error TS2494: Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher.
 
 
-!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 ==== ES3For-ofTypeCheck1.ts (1 errors) ====
     for (var v of "") { }
                   ~~

diff --git a/tests/baselines/reference/ES3For-ofTypeCheck2.errors.txt b/tests/baselines/reference/ES3For-ofTypeCheck2.errors.txt
@@ -1,6 +1,6 @@
-error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 
 
-!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 ==== ES3For-ofTypeCheck2.ts (0 errors) ====
     for (var v of [true]) { }
diff --git a/tests/baselines/reference/ES3For-ofTypeCheck4.errors.txt b/tests/baselines/reference/ES3For-ofTypeCheck4.errors.txt
@@ -1,8 +1,8 @@
-error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 ES3For-ofTypeCheck4.ts(2,17): error TS2494: Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher.
 
 
-!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 ==== ES3For-ofTypeCheck4.ts (1 errors) ====
     var union: string | string[];
     for (const v of union) { }

diff --git a/tests/baselines/reference/ES3For-ofTypeCheck6.errors.txt b/tests/baselines/reference/ES3For-ofTypeCheck6.errors.txt
@@ -1,7 +1,7 @@
-error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 
 
-!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 ==== ES3For-ofTypeCheck6.ts (0 errors) ====
     var union: string[] | number[];
     for (var v of union) { }
diff --git a/tests/baselines/reference/accessorWithES3.errors.txt b/tests/baselines/reference/accessorWithES3.errors.txt
@@ -1,11 +1,11 @@
-error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 accessorWithES3.ts(4,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 accessorWithES3.ts(10,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 accessorWithES3.ts(15,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 accessorWithES3.ts(19,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 ==== accessorWithES3.ts (4 errors) ====
     // error to use accessors in ES3 mode
 

diff --git a/tests/baselines/reference/accessorsNotAllowedInES3.errors.txt b/tests/baselines/reference/accessorsNotAllowedInES3.errors.txt
@@ -1,9 +1,9 @@
-error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 accessorsNotAllowedInES3.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 accessorsNotAllowedInES3.ts(4,15): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 ==== accessorsNotAllowedInES3.ts (2 errors) ====
     class C {
         get x(): number { return 1; }

diff --git a/tests/baselines/reference/alwaysStrictNoImplicitUseStrict.errors.txt b/tests/baselines/reference/alwaysStrictNoImplicitUseStrict.errors.txt
@@ -1,10 +1,10 @@
 error TS5053: Option 'noImplicitUseStrict' cannot be specified with option 'alwaysStrict'.
-error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5102: Option 'noImplicitUseStrict' has been removed. Please remove it from your configuration.
 alwaysStrictNoImplicitUseStrict.ts(3,13): error TS1100: Invalid use of 'arguments' in strict mode.
 
 
 !!! error TS5053: Option 'noImplicitUseStrict' cannot be specified with option 'alwaysStrict'.
-!!! error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5102: Option 'noImplicitUseStrict' has been removed. Please remove it from your configuration.
 ==== alwaysStrictNoImplicitUseStrict.ts (1 errors) ====
     module M {
         export function f() {

diff --git a/tests/baselines/reference/ambientAccessors(target=es3).errors.txt b/tests/baselines/reference/ambientAccessors(target=es3).errors.txt
@@ -1,7 +1,7 @@
-error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 
 
-!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 ==== ambientAccessors.ts (0 errors) ====
     // ok to use accessors in ambient class in ES3
     declare class C {

diff --git a/tests/baselines/reference/amdDeclarationEmitNoExtraDeclare.errors.txt b/tests/baselines/reference/amdDeclarationEmitNoExtraDeclare.errors.txt
@@ -1,9 +1,9 @@
-error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5102: Option 'out' has been removed. Please remove it from your configuration.
   Use 'outFile' instead.
 
 
-!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
 ==== Class.ts (0 errors) ====
     import { Configurable } from "./Configurable"
 

diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
@@ -4139,7 +4139,7 @@ declare namespace ts {
             responseRequired?: boolean;
         }
     }
-    const versionMajorMinor = "5.4";
+    const versionMajorMinor = "5.5";
     /** The version of the TypeScript compiler release */
     const version: string;
     /**

diff --git a/tests/baselines/reference/bigIntWithTargetES3.errors.txt b/tests/baselines/reference/bigIntWithTargetES3.errors.txt
@@ -1,11 +1,11 @@
-error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 bigIntWithTargetES3.ts(5,22): error TS2737: BigInt literals are not available when targeting lower than ES2020.
 bigIntWithTargetES3.ts(5,29): error TS2737: BigInt literals are not available when targeting lower than ES2020.
 bigIntWithTargetES3.ts(5,39): error TS2737: BigInt literals are not available when targeting lower than ES2020.
 bigIntWithTargetES3.ts(5,48): error TS2737: BigInt literals are not available when targeting lower than ES2020.
 
 
-!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 ==== bigIntWithTargetES3.ts (4 errors) ====
     const normalNumber = 123; // should not error
     let bigintType: bigint; // should not error

diff --git a/tests/baselines/reference/checkIndexConstraintOfJavascriptClassExpression.errors.txt b/tests/baselines/reference/checkIndexConstraintOfJavascriptClassExpression.errors.txt
@@ -1,12 +1,12 @@
-error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5102: Option 'out' has been removed. Please remove it from your configuration.
   Use 'outFile' instead.
 weird.js(1,1): error TS2552: Cannot find name 'someFunction'. Did you mean 'Function'?
 weird.js(1,23): error TS7006: Parameter 'BaseClass' implicitly has an 'any' type.
 weird.js(9,17): error TS7006: Parameter 'error' implicitly has an 'any' type.
 
 
-!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
 ==== weird.js (3 errors) ====
     someFunction(function(BaseClass) {
     ~~~~~~~~~~~~

diff --git a/tests/baselines/reference/checkJsdocReturnTag1.errors.txt b/tests/baselines/reference/checkJsdocReturnTag1.errors.txt
@@ -1,9 +1,9 @@
-error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5102: Option 'out' has been removed. Please remove it from your configuration.
   Use 'outFile' instead.
 
 
-!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
 ==== returns.js (0 errors) ====
     // @ts-check
     /**

diff --git a/tests/baselines/reference/checkJsdocReturnTag2.errors.txt b/tests/baselines/reference/checkJsdocReturnTag2.errors.txt
@@ -1,12 +1,12 @@
-error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5102: Option 'out' has been removed. Please remove it from your configuration.
   Use 'outFile' instead.
 returns.js(6,5): error TS2322: Type 'number' is not assignable to type 'string'.
 returns.js(13,5): error TS2322: Type 'number | boolean' is not assignable to type 'string | number'.
   Type 'boolean' is not assignable to type 'string | number'.
 
 
-!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
 ==== returns.js (2 errors) ====
     // @ts-check
     /**

diff --git a/tests/baselines/reference/compilerOptionsOutAndNoEmit.errors.txt b/tests/baselines/reference/compilerOptionsOutAndNoEmit.errors.txt
@@ -1,9 +1,9 @@
-error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5102: Option 'out' has been removed. Please remove it from your configuration.
   Use 'outFile' instead.
 
 
-!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
 ==== a.ts (0 errors) ====
     class c {
     }

diff --git a/tests/baselines/reference/computedPropertyNames52(target=es2015).errors.txt b/tests/baselines/reference/computedPropertyNames52(target=es2015).errors.txt
@@ -1,9 +1,9 @@
-error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5102: Option 'out' has been removed. Please remove it from your configuration.
   Use 'outFile' instead.
 
 
-!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
 ==== computedPropertyNames52.js (0 errors) ====
     const array = [];
     for (let i = 0; i < 10; ++i) {

diff --git a/tests/baselines/reference/computedPropertyNames52(target=es5).errors.txt b/tests/baselines/reference/computedPropertyNames52(target=es5).errors.txt
@@ -1,9 +1,9 @@
-error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5102: Option 'out' has been removed. Please remove it from your configuration.
   Use 'outFile' instead.
 
 
-!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
 ==== computedPropertyNames52.js (0 errors) ====
     const array = [];
     for (let i = 0; i < 10; ++i) {

diff --git a/tests/baselines/reference/constDeclarations-useBeforeDefinition2.errors.txt b/tests/baselines/reference/constDeclarations-useBeforeDefinition2.errors.txt
@@ -1,10 +1,10 @@
-error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5102: Option 'out' has been removed. Please remove it from your configuration.
   Use 'outFile' instead.
 file1.ts(1,1): error TS2448: Block-scoped variable 'c' used before its declaration.
 
 
-!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
 ==== file1.ts (1 errors) ====
     c;
     ~

diff --git a/tests/baselines/reference/controlFlowJavascript.errors.txt b/tests/baselines/reference/controlFlowJavascript.errors.txt
@@ -1,9 +1,9 @@
-error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5102: Option 'out' has been removed. Please remove it from your configuration.
   Use 'outFile' instead.
 
 
-!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
 ==== controlFlowJavascript.js (0 errors) ====
     let cond = true;
 

diff --git a/tests/baselines/reference/declFileWithErrorsInInputDeclarationFileWithOut.errors.txt b/tests/baselines/reference/declFileWithErrorsInInputDeclarationFileWithOut.errors.txt
@@ -1,13 +1,13 @@
-error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5102: Option 'out' has been removed. Please remove it from your configuration.
   Use 'outFile' instead.
 declFile.d.ts(2,5): error TS1038: A 'declare' modifier cannot be used in an already ambient context.
 declFile.d.ts(3,5): error TS1038: A 'declare' modifier cannot be used in an already ambient context.
 declFile.d.ts(5,5): error TS1038: A 'declare' modifier cannot be used in an already ambient context.
 declFile.d.ts(7,5): error TS1038: A 'declare' modifier cannot be used in an already ambient context.
 
 
-!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
 ==== client.ts (0 errors) ====
     ///<reference path="declFile.d.ts"/>
     var x = new M.C(); // Declaration file wont get emitted because there are errors in declaration file

diff --git a/tests/baselines/reference/declarationFileOverwriteErrorWithOut.errors.txt b/tests/baselines/reference/declarationFileOverwriteErrorWithOut.errors.txt
@@ -1,13 +1,13 @@
 error TS5055: Cannot write file '/out.d.ts' because it would overwrite input file.
   Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.
-error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5102: Option 'out' has been removed. Please remove it from your configuration.
   Use 'outFile' instead.
 
 
 !!! error TS5055: Cannot write file '/out.d.ts' because it would overwrite input file.
 !!! error TS5055:   Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.
-!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
 ==== /out.d.ts (0 errors) ====
     declare class c {
     }

diff --git a/tests/baselines/reference/definePropertyOutputES3.errors.txt b/tests/baselines/reference/definePropertyOutputES3.errors.txt
@@ -1,9 +1,9 @@
 error TS5048: Option 'useDefineForClassFields' cannot be specified when option 'target' is 'ES3'.
-error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 
 
 !!! error TS5048: Option 'useDefineForClassFields' cannot be specified when option 'target' is 'ES3'.
-!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
 ==== definePropertyOutputES3.ts (0 errors) ====
     class A {
         a = 12