# Crystal 0.19 breaks Crinja **URL:** \ **Category:** Help & Support\ **Created:** [January 19, 2026, 7:42pm UTC](https://forum.crystal-lang.org/t/crystal-0-19-breaks-crinja/8660 "2026-01-19T19:42:40Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![ralsina](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.crystal-lang.org/ralsina/32/2139_2.png) [@ralsina](https://forum.crystal-lang.org/u/ralsina)\ **Post date:** [January 19, 2026, 7:42pm UTC](https://forum.crystal-lang.org/t/crystal-0-19-breaks-crinja/8660/1 "2026-01-19T19:42:40Z")
In [GitHub - ralsina/nicolino: A not-quite-minimalistic SSG written in Crystal](http://github.com/ralsina/nicolino) if I upgrade to 0.19 build fails with this weird backtrace, all inside crinja: ```auto nicolino on  main [$⇡] is 📦 v0.10.0 via 🔮 v1.19.0 took 11s > shards build --error-trace Dependencies are satisfied Building: nicolino Error target nicolino failed to compile: In lib/crinja/src/lib/filter/collections.cr:2:10 2 | Crinja.filter :list do ^----- Error: expanding macro In lib/crinja/src/lib/filter/collections.cr:2:3 2 | Crinja.filter :list do ^ Error: expanding macro There was a problem expanding macro 'filter' Called macro defined in lib/crinja/src/runtime/callable.cr:67:3 67 | macro filter(defaults = nil, name = nil, &block) Which expanded to: > 1 | Crinja.callable(Crinja::Filter, :list, nil) do 2 | target = arguments.target! 3 | 4 | begin 5 | value = target.raw 6 | 7 | case value 8 | when String 9 | value.chars 10 | when Array 11 | value 12 | when .responds_to?(:to_a) 13 | target.to_a 14 | else 15 | raise(TypeError.new("target for list filter cannot be converted to list")) 16 | end 17 | end 18 | end 19 | Error: expanding macro In lib/crinja/src/lib/filter/collections.cr:11:14 11 | target.to_a ^--- Error: instantiating 'Crinja::Value#to_a()' In lib/crinja/src/runtime/value.cr:404:5 404 | each do |item| ^--- Error: instantiating 'each()' In lib/crinja/src/runtime/value.cr:260:5 260 | raw_each do |raw| ^------- Error: instantiating 'raw_each()' In lib/crinja/src/runtime/value.cr:244:14 244 | object.each { |value| yield value.as(Value).raw } ^--- Error: instantiating '(Array(Crinja::Value) | Crinja::Function::Cycler | Crinja::Tuple | Iterator(Crinja::Value))#each( In /usr/lib/crystal/iterator.cr:649:20 649 | value = self.next ^--- Error: instantiating 'Crinja::Tag::For::ConditionalIterator#next()' In lib/crinja/src/lib/tag/for.cr:116:7 116 | loop do ^--- Error: instantiating 'loop()' In lib/crinja/src/lib/tag/for.cr:116:7 116 | loop do ^--- Error: instantiating 'loop()' In lib/crinja/src/lib/tag/for.cr:121:27 121 | if @env.evaluator.value(@condition).truthy? ^---- Error: instantiating 'Crinja::Evaluator#value(Crinja::AST::ExpressionNode+)' In lib/crinja/src/runtime/evaluator.cr:12:15 12 | Value.new evaluate(expression) ^------- Error: instantiating 'evaluate(Crinja::AST::ExpressionNode+)' In lib/crinja/src/runtime/evaluator.cr:54:12 54 | left = evaluate expression.left ^------- Error: instantiating 'evaluate(Crinja::AST::ExpressionNode+)' In lib/crinja/src/runtime/evaluator.cr:69:13 69 | right = evaluate expression.right ^------- Error: instantiating 'evaluate(Crinja::AST::ExpressionNode+)' In lib/crinja/src/runtime/evaluator.cr:85:18 85 | callable = call_on_member(identifier) ^------------- Error: instantiating 'call_on_member(Crinja::AST::MemberExpression)' In lib/crinja/src/runtime/evaluator.cr:113:18 113 | identifier = evaluate expression.identifier ^------- Error: instantiating 'evaluate(Crinja::AST::ExpressionNode+)' In lib/crinja/src/runtime/evaluator.cr:155:14 155 | object = value! expression.identifier ^----- Error: instantiating 'value!(Crinja::AST::ExpressionNode+)' In lib/crinja/src/runtime/evaluator.cr:26:32 26 | raise UndefinedError.new(name_for_expression(expression)) ^------------------ Error: instantiating 'name_for_expression(Crinja::AST::ExpressionNode+)' In lib/crinja/src/runtime/evaluator.cr:200:8 200 | "#{name_for_expression(expression.identifier)}.#{expression.member.name}" ^------------------ Error: instantiating 'name_for_expression(Crinja::AST::ExpressionNode+)' In lib/crinja/src/runtime/evaluator.cr:204:54 204 | "#{name_for_expression(expression.identifier)}[#{evaluate expression.argument}]" ^------- Error: instantiating 'evaluate(Crinja::AST::ExpressionNode+)' In lib/crinja/src/runtime/evaluator.cr:176:24 176 | value = Resolver.resolve_attribute(argument, object) ^---------------- Error: instantiating 'Crinja::Resolver.resolve_attribute((Array(Crinja::Value) | Bool | Crinja::Value | Float64 | Hash(Crinja::Value, Crinja::Value) | Int64 | String | Nil), Crinja::Value)' In lib/crinja/src/runtime/resolver.cr:7:18 7 | value = self.resolve_getattr(name, object) ^-------------- Error: instantiating 'Crinja::Resolver.resolve_getattr((Array(Crinja::Value) | Bool | Crinja::Value | Float64 | Hash(Crinja::Value, Crinja::Value) | Int64 | String | Nil), Crinja::Value)' In lib/crinja/src/runtime/resolver.cr:31:12 31 | self.resolve_with_hash_accessor(name, value) ^------------------------- Error: instantiating 'Crinja::Resolver.resolve_with_hash_accessor(Crinja::Value, Crinja::Value)' In lib/crinja/src/runtime/resolver.cr:58:32 58 | return Value.new object[name.to_s] ^ Error: no overload matches 'Proc(Crinja::Arguments, Crinja::Value)#[]' with type String Overloads are: - Proc(*T, R)#[](*args : *T) ``` ---
**Author:** ![straight-shoota](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.crystal-lang.org/straight-shoota/32/36_2.png) [@straight-shoota](https://forum.crystal-lang.org/u/straight-shoota)\ **Post date:** [January 19, 2026, 8:22pm UTC](https://forum.crystal-lang.org/t/crystal-0-19-breaks-crinja/8660/2 "2026-01-19T20:22:56Z")
This is fixed in master: [Add Proc check in resolve\_with\_hash\_accessor method by kalinon · Pull Request #94 · straight-shoota/crinja · GitHub](https://github.com/straight-shoota/crinja/pull/94)