Migration: undefined method `to_sym' for nil:NilClass

Using rails 3.0.3 I didn't experience this problem.

CreateTestMigrationErrors.rb

class CreateTestMigrationErrors < ActiveRecord::Migration
  def self.up
    create_table :test_migration_errors do |t| 
      t.boolean :passes_test

      t.timestamps
    end 
  end 

  def self.down
    drop_table :test_migration_errors
  end 
end

Migration Output

==  CreateTestMigrationErrors: migrating ======================================
-- create_table(:test_migration_errors)
rake aborted!
An error has occurred, this and all later migrations canceled:

undefined method `boolen' for #<ActiveRecord::ConnectionAdapters::TableDefinition:0x00000100fbfeb8>

(See full trace by running task with --trace)

This behaved like any other failed migration, with no long term defects. Could the problem be other effects of the migration, take took place before the misspelled type in the migration? Rails won't migrate down, because since the migration is unfinished, it might cause errors trying to undo changes which haven't happened, but it doesn't know how to fix just the changes before the typo.