Added a test infrastructure that simulates eclipse with diet-parse, type-binding and so forth. Similar to eclipse, the test needs to be executed with lombok as vm-agent. @Delegate runs with this setup, sadly val does not, at least for now.

And as expected the tests shows that @Synchronized and @SneakyThrows are currently broken for eclipse but not for ecj.

test/transform/resource/after-eclipse/SetterOnMethod.java

@@ -0,0 +1,40 @@
+import lombok.Setter;
+class SetterOnMethod {
+  @lombok.Setter() int i;
+  @lombok.Setter() int j;
+  public @Deprecated @java.lang.SuppressWarnings("all") void setI(final int i) {
+    this.i = i;
+  }
+  public @java.lang.Deprecated @java.lang.SuppressWarnings("all") void setJ(final int j) {
+    this.j = j;
+  }
+  SetterOnMethod() {
+    super();
+  }
+}
+@lombok.Setter() class SetterOnClassOnMethod {
+  int i;
+  int j;
+  public @java.lang.SuppressWarnings("all") void setI(final int i) {
+    this.i = i;
+  }
+  public @java.lang.SuppressWarnings("all") void setJ(final int j) {
+    this.j = j;
+  }
+  SetterOnClassOnMethod() {
+    super();
+  }
+}
+@lombok.Setter() class SetterOnClassAndOnAField {
+  int i;
+  @lombok.Setter() int j;
+  public @java.lang.Deprecated @java.lang.SuppressWarnings("all") void setJ(final int j) {
+    this.j = j;
+  }
+  public @java.lang.SuppressWarnings("all") void setI(final int i) {
+    this.i = i;
+  }
+  SetterOnClassAndOnAField() {
+    super();
+  }
+}