Added/Updated tests\bugs\gh_7998_test.py: Checked on 6.0.0.257

Author: pavel-zotov

tests/bugs/gh_7998_test.py

@@ -0,0 +1,40 @@
+#coding:utf-8
+
+"""
+ID:          issue-7998
+ISSUE:       https://github.com/FirebirdSQL/firebird/issues/7998
+TITLE:       Crash during partial index checking if the condition raises a conversion error
+NOTES:
+    [10.02.2024] pzotov
+    Confirmed bug on 6.0.0.250, ISQL issues errors and hangs (does not return control to OS):
+        Statement failed, SQLSTATE = 22018
+        Error during savepoint backout - transaction invalidated
+        -conversion error from string "2"
+        Statement failed, SQLSTATE = 25000
+        transaction marked invalid and cannot be committed
+    Checked on 6.0.0.257 -- all fine.
+"""
+
+import pytest
+from firebird.qa import *
+
+db = db_factory()
+
+test_script = """
+    recreate table t0(c0 varchar(500), c1 int); 
+    create unique index t0i0 on t0(c0 , c1 ) where (t0.c1 between false and true);
+    insert into t0(c0, c1) values (1, 2);
+"""
+
+act = isql_act('db', test_script, substitutions = [('[ \t]+', ' ')])
+
+expected_stdout = """
+    Statement failed, SQLSTATE = 22018
+    conversion error from string "2"
+"""
+
+@pytest.mark.version('>=5.0.1')
+def test_1(act: Action):
+    act.expected_stdout = expected_stdout
+    act.execute(combine_output = True)
+    assert act.clean_stdout == act.clean_expected_stdout