Itcl - the [incr Tcl] extension

Debian testing recently updated itcl from 3.4.3 to 3.4.4 and it appears SpellFix is now broken for abbreviations, eg. [info exist foo] vs [info exists foo].

Repro:

#!/usr/bin/env tclsh

package require Itcl

itcl::class TestClass {
    method test {}
}

itcl::body TestClass::test {} {
    set foo "bar"
    if {[info exist foo]} {
        puts "foo exists"
    }
}

TestClass testClass
testClass test


$ ./test.tcl
SpellFix: programming error
[1]    315606 IOT instruction  ./test.tcl

Building 3.4.4 from source has the same issue, so doesn't appear to be Debian-specific. For reference, Debian testing currently has tcl 8.6.13.

3.4.4 doesn't have many changes and this commit is potentially related: https://core.tcl-lang.org/itcl/info/a036f93dad15f1d4