diff -r 14e098407bb0 -r ad69fd32778e test/langtools/tools/javac/diags/examples.not-yet.txt
--- a/test/langtools/tools/javac/diags/examples.not-yet.txt	Mon Oct 21 15:11:44 2019 +0200
+++ b/test/langtools/tools/javac/diags/examples.not-yet.txt	Mon Oct 21 15:38:26 2019 +0200
@@ -11,6 +11,7 @@
 compiler.err.invalid.repeatable.annotation.invalid.value # "can't" happen
 compiler.err.invalid.repeatable.annotation.multiple.values # can't happen
 compiler.err.io.exception                               # (javah.JavahTask?)
+compiler.err.is.preview                                 # difficult to produce reliably despite future changes to java.base
 compiler.err.limit.code                                 # Code
 compiler.err.limit.code.too.large.for.try.stmt          # Gen
 compiler.err.limit.dimensions                           # Gen
@@ -111,6 +112,7 @@
 compiler.warn.illegal.char.for.encoding
 compiler.warn.incubating.modules                        # requires adjusted classfile
 compiler.warn.invalid.archive.file
+compiler.warn.is.preview                                # difficult to produce reliably despite future changes to java.base
 compiler.warn.override.bridge
 compiler.warn.position.overflow                         # CRTable: caused by files with long lines >= 1024 chars
 compiler.warn.proc.type.already.exists                  # JavacFiler: just mentioned in TODO