microsoft
diff --git a/‎src/compiler/program.ts
+2 b/‎src/compiler/program.ts
+2
diff --git a/‎tests/baselines/reference/emitExtensionOptionsDTS.js
-12 b/‎tests/baselines/reference/emitExtensionOptionsDTS.js
-12
diff --git a/‎tests/baselines/reference/emitExtensionOptionsStartWithNonDot.js
-10 b/‎tests/baselines/reference/emitExtensionOptionsStartWithNonDot.js
-10
@@ -2928,12 +2928,14 @@ namespace ts {
             if (options.emitExtension) {
                 if (!startsWith(options.emitExtension, ".")) {
                     createOptionValueDiagnostic("emitExtension", Diagnostics.emitExtension_must_start_with_but_here_has_0_try_to_replace_it_with_0, options.emitExtension);
+                    options.noEmitOnError = true;
                 }
                 if (options.emitExtension !== Extension.Jsx && options.jsx === JsxEmit.Preserve) {
                     createOptionValueDiagnostic("emitExtension", Diagnostics.emitExtension_can_only_be_jsx_when_JSX_is_set_to_preserve, options.emitExtension);
                 }
                 if (options.emitExtension === Extension.Dts) {
                     createOptionValueDiagnostic("emitExtension", Diagnostics.emitExtension_can_not_be_d_ts, options.emitExtension);
+                    options.noEmitOnError = true;
                 }
                 // To keep it simple at the first time,
                 // just accept . - a-z A-Z 0-9
Original file line number	Diff line number	Diff line change
`@@ -2928,12 +2928,14 @@ namespace ts {`
`2928`	`2928`	`if (options.emitExtension) {`
`2929`	`2929`	`if (!startsWith(options.emitExtension, ".")) {`
`2930`	`2930`	`createOptionValueDiagnostic("emitExtension", Diagnostics.emitExtension_must_start_with_but_here_has_0_try_to_replace_it_with_0, options.emitExtension);`
	`2931`	`+ options.noEmitOnError = true;`
`2931`	`2932`	`}`
`2932`	`2933`	`if (options.emitExtension !== Extension.Jsx && options.jsx === JsxEmit.Preserve) {`
`2933`	`2934`	`createOptionValueDiagnostic("emitExtension", Diagnostics.emitExtension_can_only_be_jsx_when_JSX_is_set_to_preserve, options.emitExtension);`
`2934`	`2935`	`}`
`2935`	`2936`	`if (options.emitExtension === Extension.Dts) {`
`2936`	`2937`	`createOptionValueDiagnostic("emitExtension", Diagnostics.emitExtension_can_not_be_d_ts, options.emitExtension);`
	`2938`	`+ options.noEmitOnError = true;`
`2937`	`2939`	`}`
`2938`	`2940`	`// To keep it simple at the first time,`
`2939`	`2941`	`// just accept . - a-z A-Z 0-9`