Issues

• LIMIT with MN > MX returns MN instead of MIN(MAX(IN, MN), MX)

  PLC-lang/rusty#2040 · Filter by author s-celles opened on Nov 1, 2026

• A subrange variable without an initial value starts at 0 instead of its lower limit

  PLC-lang/rusty#2039 · Filter by author s-celles opened on Nov 1, 2026

• Untyped real literals assigned to an LREAL are evaluated in REAL: 1.0E15 + 1.0 gives 999999986991104

  PLC-lang/rusty#2037 · Filter by author s-celles opened on Nov 1, 2026

• EN := and .ENO are not available on a function block invocation (E048)

  PLC-lang/rusty#2036 · Filter by author s-celles opened on Nov 1, 2026

• LIMIT inputs are named MIN/MAX instead of the standard MN/MX, so LIMIT(MN := ...) does not resolve

  PLC-lang/rusty#2035 · Filter by author s-celles opened on Nov 1, 2026

• SR and RS inputs are named SET1/RESET and SET/RESET1 instead of the standard S1/R and S/R1

  PLC-lang/rusty#2034 · Filter by author s-celles opened on Nov 1, 2026

• TP ignores the next rising edge after a pulse that ended with IN already FALSE

  PLC-lang/rusty#2033 · Filter by author s-celles opened on Nov 1, 2026

• TON, TOF and TP switch one scan after ET reaches PT (is_in_preset_range uses <=)

  PLC-lang/rusty#2032 · Filter by author s-celles opened on Nov 1, 2026

• Constant initializers: overflow aborts codegen, and two folded forms keep the operand's type

  bug
  PLC-lang/rusty#1997 · Filter by author Angus-Bethke-Bachmann opened on Oct 16, 2026

• Sized variadics of a REFERENCE TO element type store values instead of addresses

  bug
  PLC-lang/rusty#1987 · Filter by author Angus-Bethke-Bachmann opened on Oct 14, 2026

• Compile-time array bounds checking

  PLC-lang/rusty#1986 · Filter by author token98 opened on Oct 14, 2026
  1

• Emit pointer parameter attributes (captures(none), readonly) for generated functions

  PLC-lang/rusty#1822 · Filter by author ghaith opened on Jul 20, 2026

• function VAR_OUTPUT on the direct by-ref path doesn't apply copy-out semantics

  bug
  PLC-lang/rusty#1800 · Filter by author mhasel opened on Jul 7, 2026

• VAR_OUTPUT copy-backs for cast-needed scalar and bit-access outputs run too late when call is in a condition

  bug
  PLC-lang/rusty#1799 · Filter by author mhasel opened on Jul 7, 2026

• CFC: backport IDE-side validations to the compiler

  PLC-lang/rusty#1797 · Filter by author volsa opened on Jul 6, 2026

• Inconsistent implementation difference between SUPER and THIS

  PLC-lang/rusty#1756 · Filter by author ghaith opened on Jun 1, 2026

• Inheritance/interface override of a REFERENCE TO property is rejected

  bug
  Bug

  PLC-lang/rusty#1750 · Filter by author Angus-Bethke-Bachmann opened on May 27, 2026

• Polymorphic dispatch missing for VAR_IN_OUT FB parameter calls across compilation boundaries

  PLC-lang/rusty#1743 · Filter by author ghaith opened on May 18, 2026

• Typed enum defined with typed literal initialization should produce validations for incompatible types

  bug
  PLC-lang/rusty#1694 · Filter by author Angus-Bethke-Bachmann opened on Apr 22, 2026

• Improve Parsing Error Recovery

  refactortracking
  PLC-lang/rusty#1659 · Filter by author volsa opened on Apr 9, 2026
  1

• Copyright holder for the contents of the header should be specifiable

  enhancementheader-generatorlow-priority
  PLC-lang/rusty#1626 · Filter by author Angus-Bethke-Bachmann opened on Mar 9, 2026

• dependencies.plc.h does not account for multiple generated libraries and their dependencies

  bugheader-generatormedium-priority
  PLC-lang/rusty#1625 · Filter by author Angus-Bethke-Bachmann opened on Mar 9, 2026

• Enums generate cumbersome names

  bugheader-generatorlow-priority
  PLC-lang/rusty#1624 · Filter by author Angus-Bethke-Bachmann opened on Mar 9, 2026

• Input variables of structs should be passed as (const) pointer

  bugheader-generatormedium-priority
  PLC-lang/rusty#1622 · Filter by author Angus-Bethke-Bachmann opened on Mar 9, 2026

• Make some errors non-configurable

  low-priority
  PLC-lang/rusty#1615 · Filter by author volsa opened on Feb 27, 2026