fix: Deprecation error message reporting method type as deprecated instead...

src/compiler/checker.ts

@@ -2626,6 +2626,8 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
     function addDeprecatedSuggestionWithSignature(location: Node, declaration: Node, deprecatedEntity: string | undefined, signatureString: string) {
         const diagnostic = deprecatedEntity
             ? createDiagnosticForNode(location, Diagnostics.The_signature_0_of_1_is_deprecated, signatureString, deprecatedEntity)
+            : isIdentifier(location)
+            ? createDiagnosticForNode(location, Diagnostics._0_is_deprecated, idText(location))
             : createDiagnosticForNode(location, Diagnostics._0_is_deprecated, signatureString);
         return addDeprecatedSuggestionWorker(declaration, diagnostic);
     }

tests/baselines/reference/deprecatedMethodOnChainedCall.errors.txt

@@ -0,0 +1,22 @@
+deprecatedMethodOnChainedCall.ts(14,32): suggestion TS6385: 'oldMethod' is deprecated.
+
+
+==== deprecatedMethodOnChainedCall.ts (1 errors) ====
+    // Regression test for https://github.com/microsoft/TypeScript/issues/62396
+    // Deprecation message should show the method name, not the type signature
+
+    interface Builder {
+        configure(value: string): Builder;
+        /** @deprecated use {@link Builder} instead */
+        oldMethod(): void;
+    }
+
+    declare function createBuilder(): Builder;
+
+    // When calling a deprecated method on the result of another call (chained call),
+    // the deprecation message should show the method name, not the type signature.
+    createBuilder().configure("x").oldMethod();
+                                   ~~~~~~~~~
+!!! suggestion TS6385: 'oldMethod' is deprecated.
+!!! related TS2798 deprecatedMethodOnChainedCall.ts:6:9: The declaration was marked as deprecated here.
+

tests/baselines/reference/deprecatedMethodOnChainedCall.symbols

@@ -0,0 +1,32 @@
+//// [tests/cases/compiler/deprecatedMethodOnChainedCall.ts] ////
+
+=== deprecatedMethodOnChainedCall.ts ===
+// Regression test for https://github.com/microsoft/TypeScript/issues/62396
+// Deprecation message should show the method name, not the type signature
+
+interface Builder {
+>Builder : Symbol(Builder, Decl(deprecatedMethodOnChainedCall.ts, 0, 0))
+
+    configure(value: string): Builder;
+>configure : Symbol(Builder.configure, Decl(deprecatedMethodOnChainedCall.ts, 3, 19))
+>value : Symbol(value, Decl(deprecatedMethodOnChainedCall.ts, 4, 14))
+>Builder : Symbol(Builder, Decl(deprecatedMethodOnChainedCall.ts, 0, 0))
+
+    /** @deprecated use {@link Builder} instead */
+    oldMethod(): void;
+>oldMethod : Symbol(Builder.oldMethod, Decl(deprecatedMethodOnChainedCall.ts, 4, 38))
+}
+
+declare function createBuilder(): Builder;
+>createBuilder : Symbol(createBuilder, Decl(deprecatedMethodOnChainedCall.ts, 7, 1))
+>Builder : Symbol(Builder, Decl(deprecatedMethodOnChainedCall.ts, 0, 0))
+
+// When calling a deprecated method on the result of another call (chained call),
+// the deprecation message should show the method name, not the type signature.
+createBuilder().configure("x").oldMethod();
+>createBuilder().configure("x").oldMethod : Symbol(Builder.oldMethod, Decl(deprecatedMethodOnChainedCall.ts, 4, 38))
+>createBuilder().configure : Symbol(Builder.configure, Decl(deprecatedMethodOnChainedCall.ts, 3, 19))
+>createBuilder : Symbol(createBuilder, Decl(deprecatedMethodOnChainedCall.ts, 7, 1))
+>configure : Symbol(Builder.configure, Decl(deprecatedMethodOnChainedCall.ts, 3, 19))
+>oldMethod : Symbol(Builder.oldMethod, Decl(deprecatedMethodOnChainedCall.ts, 4, 38))
+

tests/baselines/reference/deprecatedMethodOnChainedCall.types

@@ -0,0 +1,45 @@
+//// [tests/cases/compiler/deprecatedMethodOnChainedCall.ts] ////
+
+=== deprecatedMethodOnChainedCall.ts ===
+// Regression test for https://github.com/microsoft/TypeScript/issues/62396
+// Deprecation message should show the method name, not the type signature
+
+interface Builder {
+    configure(value: string): Builder;
+>configure : (value: string) => Builder
+>          : ^     ^^      ^^^^^       
+>value : string
+>      : ^^^^^^
+
+    /** @deprecated use {@link Builder} instead */
+    oldMethod(): void;
+>oldMethod : () => void
+>          : ^^^^^^    
+}
+
+declare function createBuilder(): Builder;
+>createBuilder : () => Builder
+>              : ^^^^^^       
+
+// When calling a deprecated method on the result of another call (chained call),
+// the deprecation message should show the method name, not the type signature.
+createBuilder().configure("x").oldMethod();
+>createBuilder().configure("x").oldMethod() : void
+>                                           : ^^^^
+>createBuilder().configure("x").oldMethod : () => void
+>                                         : ^^^^^^    
+>createBuilder().configure("x") : Builder
+>                               : ^^^^^^^
+>createBuilder().configure : (value: string) => Builder
+>                          : ^     ^^      ^^^^^       
+>createBuilder() : Builder
+>                : ^^^^^^^
+>createBuilder : () => Builder
+>              : ^^^^^^       
+>configure : (value: string) => Builder
+>          : ^     ^^      ^^^^^       
+>"x" : "x"
+>    : ^^^
+>oldMethod : () => void
+>          : ^^^^^^    
+

tests/cases/compiler/deprecatedMethodOnChainedCall.ts

@@ -0,0 +1,17 @@
+// @noEmit: true
+// @captureSuggestions: true
+
+// Regression test for https://github.com/microsoft/TypeScript/issues/62396
+// Deprecation message should show the method name, not the type signature
+
+interface Builder {
+    configure(value: string): Builder;
+    /** @deprecated use {@link Builder} instead */
+    oldMethod(): void;
+}
+
+declare function createBuilder(): Builder;
+
+// When calling a deprecated method on the result of another call (chained call),
+// the deprecation message should show the method name, not the type signature.
+createBuilder().configure("x").oldMethod();