fatal (exception reentered):

[mkenny]

Im getting this on a project running rails 5.2.3 and ruby 2.5.7. I can confirm that it's caused by the jbuilder gem since when I uninstall it the error disappears. Any ideas?

[KapilSachdev]

@mkenny Can you provide more information, maybe add the exception backtrace and when did this error occurs.

[pioz]

I got the same error after the upgrade from rails 5.2 to rails 6.0.3 with ruby 2.6.1. I get the exception fatal (exception reentered): with nothing after the :. If I remove the gem jbuilder (v2.10.0) the error disappears.

Here the error:

=> Booting Puma
=> Rails 6.0.3.3 application starting in development 
=> Run `rails server --help` for more startup options
Puma starting in single mode...
* Version 4.3.6 (ruby 2.6.1-p33), codename: Mysterious Traveller
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://127.0.0.1:3000
* Listening on tcp://[::1]:3000
Use Ctrl-C to stop
Started GET "/astros" for 127.0.0.1 at 2020-09-11 16:03:12 +0200
   (0.6ms)  SET NAMES utf8mb4 COLLATE utf8mb4_unicode_ci,  @@SESSION.sql_mode = CONCAT(CONCAT(@@sql_mode, ',STRICT_ALL_TABLES'), ',NO_AUTO_VALUE_ON_ZERO'),  @@SESSION.sql_auto_is_null = 0, @@SESSION.wait_timeout = 2147483
   (0.5ms)  SELECT `schema_migrations`.`version` FROM `schema_migrations` ORDER BY `schema_migrations`.`version` ASC
Processing by AstrosController#index as HTML
Completed 500 Internal Server Error in 6ms (ActiveRecord: 0.0ms | Allocations: 6760)



fatal - exception reentered:

[KapilSachdev]

A backtrace would have been helpful in debugging whats happening, but as this is not the case, so can you provide a sample app that reproduces this issue?