Reject override :all, version: in Bundler::Dsl

Version requirements are per-gem and have no meaning relative to the
`:all` target. Raise ArgumentError at the DSL entry point and store
nothing when this combination is given, even if other valid fields
are mixed in the same call.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hsbt

bundler/lib/bundler/dsl.rb

@@ -186,6 +186,10 @@ def github(repo, options = {})
     end
 
     def override(target, **operations)
+      if target == :all && operations.key?(:version)
+        raise ArgumentError, "`override :all, version:` is not allowed; version requirements are per-gem"
+      end
+
       operations.each do |field, operation|
         @overrides << Override.new(target, field, operation)
       end

spec/bundler/dsl_spec.rb

@@ -397,5 +397,24 @@
     it "is empty by default" do
       expect(subject.overrides).to eq([])
     end
+
+    it "raises ArgumentError when target is :all and version: is given" do
+      expect do
+        subject.override(:all, version: ">= 8.0")
+      end.to raise_error(ArgumentError, /`override :all, version:` is not allowed/)
+    end
+
+    it "rejects :all + version: even when other fields are also given" do
+      expect do
+        subject.override(:all, required_ruby_version: :ignore_upper, version: ">= 8.0")
+      end.to raise_error(ArgumentError, /`override :all, version:` is not allowed/)
+    end
+
+    it "does not record any override when :all + version: is rejected" do
+      expect do
+        subject.override(:all, version: ">= 8.0")
+      end.to raise_error(ArgumentError)
+      expect(subject.overrides).to eq([])
+    end
   end
 end