Renaming sqlite table with unique index throws "index already exists"

[karrakoliko]

Bug Report

Q	A
BC Break	no
Version	3.6.0.0

Summary

When i try rename sqlite table that contains index, i get exception "index *** already exists".

Current behavior

An exception occurred while executing a query: SQLSTATE[HY000]: General error: 1 index *your_index_name* already exists

How to reproduce

1. Create sqlite table
2. Create unique index on any column of this table
3. Create migration that renames table:

 $schema->renameTable('oldTableName', 'newTableName');

Demo repo: https://github.com/karrakoliko/doctrine-migrations-sqlite-driver-is-broken-example

Expected behavior

Table renamed (recreated with all the indexes, keys, etc., in case of sqlite)

Workaround tried (no success)

I tried workaround, but no success:
Drop index in preUp hook, then recreate it in postUp hook. I ensured both hooks executed. Index successfully dropped, but not created (silently: no error appeared). $table->hasIndex(indexName) returns true, but index never created.

[karrakoliko]

Workaround that works: to rename table use 3 migrations instead of one:

1. migration that drops indexes
2. migration that renames table
3. migration that restores (re-creates) indexes