[GR-20428] Fix ENV methods parameter conversion to String.

PullRequest: truffleruby/1237

Author: bjfish

CHANGELOG.md

@@ -62,6 +62,7 @@ Bug fixes:
 * Fixed `Complex` and `Rational` should be frozen after initializing.
 * Fixed `printf` should raise error when not enough arguments for positional argument.
 * Removed "shadowing outer local variable" warning.
+* Fixed parameter conversion to `String` in ENV methods.
 
 Compatibility:
 

spec/tags/core/env/assoc_tags.txt

@@ -1,2 +1 @@
-fails:ENV.index raises TypeError if the argument is not a String and does not respond to #to_str
 fails:ENV.index warns about deprecation