diff options
Diffstat (limited to 'mrblib')
| -rw-r--r-- | mrblib/string.rb | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mrblib/string.rb b/mrblib/string.rb index aa2ca9973..b13cfd69a 100644 --- a/mrblib/string.rb +++ b/mrblib/string.rb @@ -78,6 +78,7 @@ class String # # ISO 15.2.10.5.19 def gsub!(*args, &block) + raise RuntimeError, "can't modify frozen String" if frozen? str = self.gsub(*args, &block) return nil if str == self self.replace(str) @@ -123,6 +124,7 @@ class String # # ISO 15.2.10.5.37 def sub!(*args, &block) + raise RuntimeError, "can't modify frozen String" if frozen? str = self.sub(*args, &block) return nil if str == self self.replace(str) |