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-rw-r--r--mrblib/string.rb4
1 files changed, 2 insertions, 2 deletions
diff --git a/mrblib/string.rb b/mrblib/string.rb
index 4c6114ecb..ee98cfa0c 100644
--- a/mrblib/string.rb
+++ b/mrblib/string.rb
@@ -96,7 +96,7 @@ class String
#
# ISO 15.2.10.5.19
def gsub!(*args, &block)
- raise RuntimeError, "can't modify frozen String" if frozen?
+ raise FrozenError, "can't modify frozen String" if frozen?
return to_enum(:gsub!, *args) if args.length == 1 && !block
str = self.gsub(*args, &block)
return nil if str == self
@@ -159,7 +159,7 @@ class String
#
# ISO 15.2.10.5.37
def sub!(*args, &block)
- raise RuntimeError, "can't modify frozen String" if frozen?
+ raise FrozenError, "can't modify frozen String" if frozen?
str = self.sub(*args, &block)
return nil if str == self
self.replace(str)