Qt Creator 1.3.1-4.1 crashes after comma entered in editor

In some cases, after I enter the comma in argument list of function, Creator crashes.

In this case, if there is no semicolon entered yet after function definition,

int
a
(
int b
)

comma after b will no cause crash.

But, if semicolon is already added,

int
a
(
int b
);

new entered after b comma will cause program termination.