Issues

• Not building on OpenBSD

  MLton/mlton#644 · Filter by author pavanmishra opened on Feb 13, 2026
  2

• Feature request: -keep-all, -keep-dir

  MLton/mlton#641 · Filter by author pscollins opened on Jan 24, 2026
  2

• Program does not terminate when compiled with -ssa-passes minimal

  MLton/mlton#630 · Filter by author nanikamado opened on Dec 11, 2025
  4

• MLtonWorld.load fails unless the binary was invoked with a full path

  MLton/mlton#628 · Filter by author jmaessen opened on Nov 22, 2025
  2

• SML/NJ 110.99.6.1 library upgrade causes Ur/Web miscompilation

  MLton/mlton#618 · Filter by author bbarenblat opened on Jul 12, 2025
  3

• Real.toString ignores the sign of zero

  Basis Library
  MLton/mlton#604 · Filter by author p-ouellette opened on Feb 15, 2025
  2

• Alternative defunctionalisation technique

  MLton/mlton#581 · Filter by author hummy123 opened on Sep 8, 2024
  3

• Nested withtype not translated correctly?

  MLton/mlton#548 · Filter by author andreasabel opened on Feb 10, 2024
  3

• Equivalent programs show different behaviour

  MLton/mlton#508 · Filter by author pclayton opened on Aug 17, 2023
  3

• Improve elimination for locally known cases

  Compiler
  MLton/mlton#332 · Filter by author jasoncarr0 opened on Aug 15, 2019

• Add induction / termination checking infrastructure

  Compiler
  MLton/mlton#331 · Filter by author jasoncarr0 opened on Aug 15, 2019

• Peform extra datatype optimizations for SSA(2)

  Compiler
  MLton/mlton#330 · Filter by author jasoncarr0 opened on Aug 15, 2019

• Eliminate tuples from IR and use datatypes instead

  Compiler
  MLton/mlton#329 · Filter by author jasoncarr0 opened on Aug 15, 2019

• Reuse constructor tags of the same shape for different types

  Compiler
  MLton/mlton#302 · Filter by author jasoncarr0 opened on May 15, 2019

• Investigate representation issues for enum-like types

  Compiler
  MLton/mlton#301 · Filter by author jasoncarr0 opened on May 15, 2019

• Long compile-times for RedPRL

  MLton/mlton#243 · Filter by author MatthewFluet opened on Feb 6, 2018

• Investigate alternate stack- and register-allocation strategies in backend

  Compilerenhancement
  MLton/mlton#218 · Filter by author MatthewFluet opened on Nov 6, 2017

• Consider Ref_alloc and Ref_uninit primitives

  Compilerenhancement
  MLton/mlton#209 · Filter by author MatthewFluet opened on Oct 23, 2017
  1

• Long compile times for RedPRL

  MLton/mlton#196 · Filter by author MatthewFluet opened on Oct 6, 2017
  4

• Improve def-use information

  Compilerenhancement
  MLton/mlton#157 · Filter by author MatthewFluet opened on Aug 10, 2016

• Document def-use information

  enhancementWebsite/Guide
  MLton/mlton#156 · Filter by author MatthewFluet opened on Aug 10, 2016

• Support incremental parsing and type-checking

  MLton/mlton#141 · Filter by author DemiMarie opened on Apr 2, 2016
  2

• Host wiki on github

  Website/Guide
  MLton/mlton#114 · Filter by author agoode opened on Jul 21, 2015
  2

• Missing optimizations in flat-array.sml benchmark

  Compilerenhancement
  MLton/mlton#71 · Filter by author MatthewFluet opened on Jul 22, 2014
  3

• Provide an SML implementation of the IntInf_* primitives

  Basis Libraryenhancement
  MLton/mlton#60 · Filter by author MatthewFluet opened on Jun 18, 2014
  4