Wrong SQL generated for MySQL when using TEXT type with unique index

[peter-si]

Hi, we encountered an issue with generated doctrine migration on MySQL 8.0.26 when specifying unique index with text type field

In ExceptionConverter.php line 117:
                                                                               
  An exception occurred while executing a query: SQLSTATE[42000]: Syntax erro  
  r or access violation: 1170 BLOB/TEXT column 'token' used in key specificat  
  ion without a key length                                                     
                                                                               
In Exception.php line 28:
                                                                               
  SQLSTATE[42000]: Syntax error or access violation: 1170 BLOB/TEXT column 't  
  oken' used in key specification without a key length                         
                                                                               
In Connection.php line 70:
                                                                               
  SQLSTATE[42000]: Syntax error or access violation: 1170 BLOB/TEXT column 't  
  oken' used in key specification without a key length 

On mariadb the generated code works ok, however on mysql it throws above mentioned error. We were trying to set a specific version in the bundle config with 'server_version' => '8.0.26', to hint that we are using mysql, not mariadb but that didn't help.

In the end we solved it by removing the unique index. I would expect to get an exception on generation?