[8u40] Request for approval backport of 8058708: java.lang.AssertionError compiling source code

[Vicente-Arturo Romero-Zaldivar]

Please approve the backport of the fix for JDK-8058708 to 8u40.

Bug: https: https://bugs.openjdk.java.net/browse/JDK-8058708
Backport: https://bugs.openjdk.java.net/browse/JDK-8037937
Changeset: http://hg.openjdk.java.net/jdk9/dev/langtools/rev/e891e0c4edc5

The patch applies cleanly.

Thanks,
Vicente