Interop bug - clojure - executor/forward - param coercion issue

[paroda]

Description

ClassCastException when using executor/forward in cojure-mxnet with 3 args

Environment info (Required)

----------Python Info----------
('Version      :', '2.7.13')
('Compiler     :', 'GCC 6.3.0 20170516')
('Build        :', ('default', 'Nov 24 2017 17:33:09'))
('Arch         :', ('64bit', 'ELF'))
------------Pip Info-----------
No corresponding pip install for current python.
----------MXNet Info-----------
No MXNet installed.
----------System Info----------
('Platform     :', 'Linux-4.9.0-8-amd64-x86_64-with-debian-buster-sid')
('system       :', 'Linux')
('node         :', 'htx9a')
('release      :', '4.9.0-8-amd64')
('version      :', '#1 SMP Debian 4.9.110-3+deb9u4 (2018-08-21)')
----------Hardware Info----------
('machine      :', 'x86_64')
('processor    :', '')
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                4
On-line CPU(s) list:   0-3
Thread(s) per core:    1
Core(s) per socket:    1
Socket(s):             4
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 94
Model name:            Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz
Stepping:              3
CPU MHz:               2711.247
BogoMIPS:              5424.15
Hypervisor vendor:     VMware
Virtualization type:   full
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              8192K
NUMA node0 CPU(s):     0-3
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch epb invpcid_single kaiser fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 invpcid rtm rdseed adx smap xsaveopt dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp

Package used (Python/R/Scala/Julia): Clojure
I am using Clojure 1.9.0
Java version: openjdk 1.8.0_181

Build info (Required if built from source)

Compiler: gcc
MXNet commit hash: db295ef

Build config:
make -j4 USE_CUDA=0 USE_BLAS=openblas

Minimum reproducible example

(ns mynn.tut
  (:require [org.apache.clojure-mxnet.ndarray :as nda]
            [org.apache.clojure-mxnet.executor :as exe]
            [org.apache.clojure-mxnet.symbol :as sym]
            [t6.from-scala.core :as $]))

(def a (sym/variable "a"))
(def b (sym/variable "b"))
(def c (sym/+ a b))

(def ex (sym/bind c {"a" (nda/ones [2 3])
                     "b" (nda/ones [2 3])}))

(exe/forward ex false {"a" (nda/ones [2 3])})
;; => ClassCastException Cannot cast scala.collection.immutable.Map$Map1 to scala.collection.Seq

(exe/forward ex false ($/immutable-list ($/tuple "a" (nda/ones [2 3]))))
;; => nil (no error)

What have you tried to solve it?

Need to fix the coercion of 3rd arg of executor/forward to generate Seq instead of Map

[stu1130]

Thanks for submitting the issue and your contribution! @paroda
@mxnet-label-bot [Clojure, Bug]

[lupesko]

@gigasquid - can you please take a look?

[gigasquid]

There is a PR in progress for it - it just got closed by mistake #12630

[gigasquid]

PR merged - closing