commit 7bdaea6e0df849cf3dd7eaaf454eb88f637d1884
author Bram Moolenaar <Bram@vim.org> Sun Apr 19 18:27:26 2020 +0200
committer Bram Moolenaar <Bram@vim.org> Sun Apr 19 18:27:26 2020 +0200
tree fb91b5cbe233e4fe9ab0b52a7851a6f47c5cd84c
parent eb58a2465825c258beafae96240824923f73779f

patch 8.2.0605: Vim9: cannot unlet an environment variable

Problem:    Vim9: cannot unlet an environment variable.
Solution:   Implement unlet for $VAR.

src/vim9.h

diff --git a/src/vim9.h b/src/vim9.h
index 64749ce..a75e175 100644
--- a/src/vim9.h
+++ b/src/vim9.h
@@ -45,6 +45,7 @@
     ISN_STORENR,    // store number into local variable isn_arg.storenr.stnr_idx
 
     ISN_UNLET,		// unlet variable isn_arg.unlet.ul_name
+    ISN_UNLETENV,	// unlet environment variable isn_arg.unlet.ul_name
 
     // constants
     ISN_PUSHNR,		// push number isn_arg.number