Profiling results ----------------- Total cpu time observed: 25944ms (out of 26496ms) Number of samples taken: 81 (once every 320ms) (Hiding functions with self<1.0% and local<2.0%: 1 of 109 hidden) ================================================================= Caller Idx Total Self Name+src Local% ms(pct) ms(pct) Callee ================================================================= ??? [7] 100.0% [1] 25944(100.0%) 0(0.0%) profile-thunk16 ...e/pkgs/profile-lib/main.rkt:9:0 run [4] 100.0% ----------------------------------------------------------------- atab-add-altn [97] 22.4% ??? [7] 77.6% [2] 1340(5.2%) 0(0.0%) errors ...es/herbie/js-tweaks/src/points.rkt:223:0 for-loop [5] 100.0% ----------------------------------------------------------------- ??? [42] 100.0% [3] 296(1.1%) 0(0.0%) approximate9 ...js-tweaks/src/core/taylor.rkt:12:0 for-loop [6] 100.0% ----------------------------------------------------------------- profile-thunk16 [1] 100.0% [4] 25944(100.0%) 0(0.0%) run ...et-7.0/share/pkgs/profile-lib/main.rkt:39:2 ??? [7] 100.0% ----------------------------------------------------------------- errors [2] 100.0% [5] 1340(5.2%) 300(1.2%) for-loop .../herbie/js-tweaks/src/points.rkt:225:2 ??? [7] 77.6% ----------------------------------------------------------------- approximate9 [3] 100.0% [6] 296(1.1%) 0(0.0%) for-loop ...ie/js-tweaks/src/core/taylor.rkt:30:18 taylor [26] 100.0% ----------------------------------------------------------------- for-loop [5] 1.3% run [4] 49.3% [7] 25944(100.0%) 0(0.0%) ??? ...lects/racket/private/more-scheme.rkt:261:28 profile-thunk16 [1] 49.3% run-improve43 [8] 34.4% prepare-points [9] 10.0% oracle-error [10] 1.8% errors [2] 1.3% ??? [22] 1.3% eval-errors [11] 1.2% loop [76] 0.6% ----------------------------------------------------------------- ??? [7] 100.0% [8] 17838(68.8%) 0(0.0%) run-improve43 .../js-tweaks/src/mainloop.rkt:339:0 for-loop [12] 81.4% simplify! [21] 18.6% ----------------------------------------------------------------- ??? [7] 100.0% [9] 5186(20.0%) 0(0.0%) prepare-points ...e/js-tweaks/src/points.rkt:166:0 loop [13] 100.0% ----------------------------------------------------------------- ??? [7] 100.0% [10] 920(3.5%) 0(0.0%) oracle-error ...bie/js-tweaks/src/points.rkt:207:0 for-loop [14] 100.0% ----------------------------------------------------------------- ??? [7] 100.0% [11] 648(2.5%) 0(0.0%) eval-errors ...rbie/js-tweaks/src/points.rkt:198:0 for-loop [15] 100.0% ----------------------------------------------------------------- run-improve43 [8] 100.0% [12] 14524(56.0%) 0(0.0%) for-loop ...erbie/js-tweaks/src/mainloop.rkt:354:4 run-iter! [16] 100.0% ----------------------------------------------------------------- prepare-points [9] 100.0% [13] 5186(20.0%) 0(0.0%) loop ...lies/herbie/js-tweaks/src/points.rkt:143:4 loop [17] 76.0% ??? [18] 17.5% ordinary-value? [20] 6.5% ----------------------------------------------------------------- oracle-error [10] 100.0% [14] 920(3.5%) 0(0.0%) for-loop .../herbie/js-tweaks/src/points.rkt:208:2 loop [76] 66.3% map [19] 33.7% ----------------------------------------------------------------- eval-errors [11] 100.0% [15] 648(2.5%) 0(0.0%) for-loop .../herbie/js-tweaks/src/points.rkt:200:2 ??? [22] 100.0% ----------------------------------------------------------------- for-loop [12] 100.0% [16] 14524(56.0%) 0(0.0%) run-iter! ...rbie/js-tweaks/src/mainloop.rkt:320:0 simplify! [21] 95.9% finalize-iter! [25] 2.1% gen-series! [27] 2.0% ----------------------------------------------------------------- loop [13] 100.0% [17] 3940(15.2%) 0(0.0%) loop ...lies/herbie/js-tweaks/src/points.rkt:102:2 ??? [22] 91.2% ??? [66] 8.8% ----------------------------------------------------------------- loop [13] 100.0% [18] 910(3.5%) 0(0.0%) ??? ...tlies/herbie/js-tweaks/src/points.rkt:127:2 ??? [42] 100.0% ----------------------------------------------------------------- taylor [26] 48.8% for-loop [14] 51.2% [19] 606(2.3%) 0(0.0%) map ...t-7.0/collects/racket/private/map.rkt:35:13 ??? [24] 51.2% taylor [26] 48.8% ----------------------------------------------------------------- loop [13] 100.0% [20] 336(1.3%) 0(0.0%) ordinary-value? ...ie/js-tweaks/src/float.rkt:80:0 special-value? [23] 100.0% ----------------------------------------------------------------- run-improve43 [8] 19.2% run-iter! [16] 80.8% [21] 17242(66.5%) 0(0.0%) simplify! ...rbie/js-tweaks/src/mainloop.rkt:217:0 ??? [28] 100.0% ----------------------------------------------------------------- loop [76] 10.4% for-loop [15] 11.0% ??? [7] 17.7% loop [17] 61.0% [22] 5892(22.7%) 0(0.0%) ??? ...lies/herbie/js-tweaks/src/programs.rkt:99:2 ??? [29] 56.2% ??? [42] 43.8% ----------------------------------------------------------------- ordinary-value? [20] 100.0% [23] 336(1.3%) 0(0.0%) special-value? ...bie/js-tweaks/src/float.rkt:76:0 for-loop [30] 100.0% ----------------------------------------------------------------- map [19] 100.0% [24] 310(1.2%) 0(0.0%) ??? ...lies/herbie/js-tweaks/src/points.rkt:209:26 ??? [42] 100.0% ----------------------------------------------------------------- run-iter! [16] 100.0% [25] 300(1.2%) 0(0.0%) finalize-iter! ...js-tweaks/src/mainloop.rkt:271:0 ??? [66] 100.0% ----------------------------------------------------------------- map [19] 50.0% for-loop [6] 50.0% [26] 296(1.1%) 0(0.0%) taylor ...rbie/js-tweaks/src/core/taylor.rkt:170:0 map [19] 50.0% ??? [31] 50.0% ----------------------------------------------------------------- run-iter! [16] 100.0% [27] 296(1.1%) 0(0.0%) gen-series! ...ie/js-tweaks/src/mainloop.rkt:153:0 for-loop [32] 100.0% ----------------------------------------------------------------- simplify! [21] 100.0% [28] 17242(66.5%) 0(0.0%) ??? ...herbie/js-tweaks/src/core/simplify.rkt:26:0 for-loop [33] 75.0% loop [34] 19.7% one-iter [37] 5.2% ----------------------------------------------------------------- ??? [22] 100.0% [29] 3314(12.8%) 344(1.3%) ??? ...t-7.0/collects/racket/private/kw.rkt:592:14 ??? [98] 79.8% ??? [35] 9.8% ----------------------------------------------------------------- special-value? [23] 100.0% [30] 336(1.3%) 336(1.3%) for-loop ...es/herbie/js-tweaks/src/float.rkt:17:3 ----------------------------------------------------------------- taylor [26] 100.0% [31] 296(1.1%) 0(0.0%) ??? ...js-tweaks/src/function-definitions.rkt:46:2 ??? [42] 100.0% ----------------------------------------------------------------- gen-series! [27] 100.0% [32] 296(1.1%) 0(0.0%) for-loop ...erbie/js-tweaks/src/mainloop.rkt:160:7 taylor-alt [36] 100.0% ----------------------------------------------------------------- ??? [28] 100.0% [33] 12934(49.9%) 0(0.0%) for-loop ...e/js-tweaks/src/core/simplify.rkt:33:2 one-iter [37] 100.0% ----------------------------------------------------------------- ??? [28] 100.0% [34] 3404(13.1%) 0(0.0%) loop ...rbie/js-tweaks/src/core/simplify.rkt:105:2 for-loop [38] 91.0% loop [39] 9.0% ----------------------------------------------------------------- ??? [29] 100.0% [35] 326(1.3%) 326(1.3%) ??? ...rbie/js-tweaks/src/syntax/syntax.rkt:209:17 ----------------------------------------------------------------- for-loop [32] 100.0% [36] 296(1.1%) 0(0.0%) taylor-alt ...bie/js-tweaks/src/mainloop.rkt:139:0 for-loop [40] 100.0% ----------------------------------------------------------------- ??? [28] 6.5% for-loop [33] 93.5% [37] 13838(53.3%) 0(0.0%) one-iter ...e/js-tweaks/src/core/simplify.rkt:65:0 for-loop [41] 79.8% find-matches [43] 20.2% ----------------------------------------------------------------- loop [34] 100.0% [38] 3096(11.9%) 300(1.2%) for-loop .../js-tweaks/src/core/simplify.rkt:111:4 for-loop [44] 30.2% loop [45] 20.5% expression-cost [50] 19.4% argmin [46] 10.5% for-loop [53] 9.7% ----------------------------------------------------------------- loop [34] 100.0% [39] 308(1.2%) 308(1.2%) loop .../racket-7.0/collects/racket/list.rkt:537:4 ----------------------------------------------------------------- taylor-alt [36] 100.0% [40] 296(1.1%) 0(0.0%) for-loop ...erbie/js-tweaks/src/mainloop.rkt:145:6 ??? [42] 100.0% ----------------------------------------------------------------- one-iter [37] 100.0% [41] 11040(42.6%) 0(0.0%) for-loop ...e/js-tweaks/src/core/simplify.rkt:67:2 for-loop [47] 100.0% ----------------------------------------------------------------- ??? [42] 1.8% ??? [31] 1.8% for-loop [40] 1.8% ??? [24] 7.6% ??? [18] 22.2% ??? [22] 63.0% [42] 4094(15.8%) 946(3.6%) ??? ...tract/private/arrow-higher-order.rkt:357:33 ->flonum [49] 32.1% mk-ival [51] 23.2% sample-multi-bounded [54] 14.4% approximate9 [3] 1.8% ??? [42] 1.8% ??? [55] 1.8% ----------------------------------------------------------------- one-iter [37] 100.0% [43] 2798(10.8%) 0(0.0%) find-matches ...-tweaks/src/core/simplify.rkt:55:0 for-loop [48] 100.0% ----------------------------------------------------------------- for-loop [38] 100.0% [44] 934(3.6%) 0(0.0%) for-loop ...js-tweaks/src/core/simplify.rkt:115:16 for-loop [52] 100.0% ----------------------------------------------------------------- for-loop [38] 100.0% [45] 634(2.4%) 0(0.0%) loop .../racket-7.0/collects/racket/list.rkt:751:4 expression-cost [50] 100.0% ----------------------------------------------------------------- for-loop [38] 100.0% [46] 326(1.3%) 0(0.0%) argmin ...acket-7.0/collects/racket/list.rkt:765:0 for-loop [53] 100.0% ----------------------------------------------------------------- for-loop [41] 100.0% [47] 11040(42.6%) 0(0.0%) for-loop ...e/js-tweaks/src/core/simplify.rkt:70:4 dedup-children! [75] 48.2% merge-egraph-nodes! [56] 43.6% substitute-e [62] 5.5% mk-enode! [81] 2.7% ----------------------------------------------------------------- for-loop [48] 50.0% find-matches [43] 50.0% [48] 2798(10.8%) 0(0.0%) for-loop ...e/js-tweaks/src/core/simplify.rkt:57:8 for-loop [48] 50.0% match-e [57] 50.0% ----------------------------------------------------------------- ??? [42] 100.0% [49] 1314(5.1%) 308(1.2%) ->flonum ...s/herbie/js-tweaks/src/float.rkt:149:0 ??? [59] 76.6% ----------------------------------------------------------------- for-loop [38] 48.7% loop [45] 51.3% [50] 1236(4.8%) 0(0.0%) expression-cost ...s-tweaks/src/programs.rkt:157:0 compile [58] 100.0% ----------------------------------------------------------------- ??? [42] 100.0% [51] 950(3.7%) 0(0.0%) mk-ival ...rbie/js-tweaks/src/biginterval.rkt:57:0 bf [60] 100.0% ----------------------------------------------------------------- for-loop [44] 100.0% [52] 934(3.6%) 934(3.6%) for-loop ...js-tweaks/src/core/simplify.rkt:119:23 ----------------------------------------------------------------- for-loop [38] 47.9% argmin [46] 52.1% [53] 626(2.4%) 0(0.0%) for-loop ...erbie/js-tweaks/src/programs.rkt:158:2 table-ref [61] 100.0% ----------------------------------------------------------------- ??? [42] 100.0% [54] 588(2.3%) 588(2.3%) sample-multi-bounded ...tweaks/src/points.rkt:15:0 ----------------------------------------------------------------- ??? [42] 100.0% [55] 296(1.1%) 0(0.0%) ??? ...herbie/js-tweaks/src/core/matcher.rkt:66:17 for-loop [63] 100.0% ----------------------------------------------------------------- for-loop [70] 3.7% merge-egraph-nodes! [56] 6.7% for-loop [47] 89.6% [56] 4810(18.5%) 0(0.0%) merge-egraph-nodes! ...s/src/core/egraph.rkt:143:0 loop! [64] 79.6% for-loop [70] 7.5% merge-egraph-nodes! [56] 6.7% update-leader! [72] 6.2% ----------------------------------------------------------------- for-loop [78] 17.2% for-loop [48] 82.8% [57] 2798(10.8%) 0(0.0%) match-e ...rbie/js-tweaks/src/core/ematch.rkt:39:0 for-loop [65] 83.4% constant? [73] 10.7% ??? [66] 5.9% ----------------------------------------------------------------- expression-cost [50] 100.0% [58] 1236(4.8%) 0(0.0%) compile ...herbie/js-tweaks/src/programs.rkt:134:0 hash-ref! [67] 100.0% ----------------------------------------------------------------- ->flonum [49] 100.0% [59] 1006(3.9%) 0(0.0%) ??? ...ghtlies/herbie/js-tweaks/src/float.rkt:23:2 for-loop [68] 100.0% ----------------------------------------------------------------- mk-ival [51] 100.0% [60] 950(3.7%) 0(0.0%) bf ...ath-lib/math/private/bigfloat/mpfr.rkt:601:2 new-mpfr [106] 66.9% ??? [107] 33.1% ----------------------------------------------------------------- for-loop [53] 100.0% [61] 626(2.4%) 300(1.2%) table-ref .../herbie/js-tweaks/src/common.rkt:41:0 for-loop [71] 52.1% ----------------------------------------------------------------- for-loop [69] 33.8% for-loop [47] 66.2% [62] 608(2.3%) 0(0.0%) substitute-e ...js-tweaks/src/core/ematch.rkt:64:0 for-loop [69] 83.1% ??? [66] 16.9% ----------------------------------------------------------------- ??? [55] 100.0% [63] 296(1.1%) 0(0.0%) for-loop ...ie/js-tweaks/src/core/matcher.rkt:42:9 for-loop [74] 100.0% ----------------------------------------------------------------- loop [76] 26.5% merge-egraph-nodes! [56] 73.5% [64] 4150(16.0%) 358(1.4%) loop! ...herbie/js-tweaks/src/core/enode.rkt:187:2 custom-set-union [77] 51.4% loop [76] 34.0% set [80] 6.7% update-en-expr [85] 3.6% ----------------------------------------------------------------- match-e [57] 100.0% [65] 2500(9.6%) 930(3.6%) for-loop ...ie/js-tweaks/src/core/ematch.rkt:52:11 for-loop [78] 38.3% curry* [82] 23.8% cartesian-product [84] 6.6% ----------------------------------------------------------------- finalize-iter! [25] 23.3% substitute-e [62] 24.0% match-e [57] 25.8% loop [17] 26.9% [66] 1286(5.0%) 986(3.8%) ??? ...contract/private/arrow-val-first.rkt:388:18 for-loop [87] 23.3% ----------------------------------------------------------------- ??? [79] 44.5% compile [58] 55.5% [67] 1236(4.8%) 936(3.6%) hash-ref! .../racket/private/more-scheme.rkt:376:2 ??? [79] 52.6% ----------------------------------------------------------------- ??? [59] 100.0% [68] 1006(3.9%) 672(2.6%) for-loop ...es/herbie/js-tweaks/src/float.rkt:24:5 return/no-unsupplied [83] 33.2% ----------------------------------------------------------------- substitute-e [62] 100.0% [69] 608(2.3%) 0(0.0%) for-loop ...ie/js-tweaks/src/core/ematch.rkt:73:24 substitute-e [62] 50.7% mk-enode! [81] 49.3% ----------------------------------------------------------------- merge-egraph-nodes! [56] 100.0% [70] 360(1.4%) 0(0.0%) for-loop ...ie/js-tweaks/src/core/egraph.rkt:197:4 merge-egraph-nodes! [56] 50.0% dedup-children! [75] 50.0% ----------------------------------------------------------------- table-ref [61] 100.0% [71] 326(1.3%) 326(1.3%) for-loop ...s/herbie/js-tweaks/src/common.rkt:43:4 ----------------------------------------------------------------- merge-egraph-nodes! [56] 100.0% [72] 300(1.2%) 0(0.0%) update-leader! ...tweaks/src/core/egraph.rkt:211:0 custom-set-union! [86] 100.0% ----------------------------------------------------------------- match-e [57] 100.0% [73] 298(1.1%) 0(0.0%) constant? ...js-tweaks/src/syntax/syntax.rkt:721:0 value? [88] 100.0% ----------------------------------------------------------------- for-loop [63] 100.0% [74] 296(1.1%) 0(0.0%) for-loop ...ie/js-tweaks/src/core/matcher.rkt:27:9 fallback-update [89] 100.0% ----------------------------------------------------------------- for-loop [70] 6.3% for-loop [47] 93.7% [75] 5682(21.9%) 0(0.0%) dedup-children! ...tweaks/src/core/enode.rkt:195:0 loop [90] 94.7% loop [95] 5.3% ----------------------------------------------------------------- ??? [7] 9.7% loop! [64] 13.7% for-loop [14] 18.9% loop [76] 57.7% [76] 3220(12.4%) 310(1.2%) loop ...-7.0/collects/racket/private/map.rkt:40:19 loop [76] 57.7% ??? [22] 18.9% eval-prog [93] 9.7% loop! [64] 8.9% ----------------------------------------------------------------- loop! [64] 100.0% [77] 2514(9.7%) 962(3.7%) custom-set-union ...et/private/set-types.rkt:168:0 for-loop [91] 61.7% ----------------------------------------------------------------- for-loop [65] 100.0% [78] 1274(4.9%) 0(0.0%) for-loop ...ie/js-tweaks/src/core/ematch.rkt:58:37 match-e [57] 75.7% ??? [94] 24.3% ----------------------------------------------------------------- hash-ref! [67] 100.0% [79] 900(3.5%) 300(1.2%) ??? ...ies/herbie/js-tweaks/src/programs.rkt:142:5 hash-ref! [67] 88.9% ----------------------------------------------------------------- loop! [64] 100.0% [80] 668(2.6%) 668(2.6%) set ...collects/racket/private/set-types.rkt:981:0 ----------------------------------------------------------------- for-loop [69] 50.0% for-loop [47] 50.0% [81] 600(2.3%) 600(2.3%) mk-enode! ...ie/js-tweaks/src/core/egraph.rkt:97:0 ----------------------------------------------------------------- for-loop [65] 100.0% [82] 596(2.3%) 0(0.0%) curry* ...et-7.0/collects/racket/function.rkt:44:2 procedure-arity [92] 100.0% ----------------------------------------------------------------- for-loop [68] 100.0% [83] 334(1.3%) 334(1.3%) return/no-unsupplied ...ct/private/arr-i.rkt:534:0 ----------------------------------------------------------------- for-loop [65] 100.0% [84] 332(1.3%) 332(1.3%) cartesian-product ...ollects/racket/list.rkt:822:0 ----------------------------------------------------------------- loop! [64] 100.0% [85] 300(1.2%) 300(1.2%) update-en-expr ...tweaks/src/core/egraph.rkt:205:0 ----------------------------------------------------------------- update-leader! [72] 100.0% [86] 300(1.2%) 0(0.0%) custom-set-union! ...t/private/set-types.rkt:245:0 for-loop [96] 100.0% ----------------------------------------------------------------- ??? [66] 100.0% [87] 300(1.2%) 0(0.0%) for-loop .../js-tweaks/src/core/alt-table.rkt:56:2 atab-add-altn [97] 100.0% ----------------------------------------------------------------- constant? [73] 100.0% [88] 298(1.1%) 298(1.1%) value? ...rbie/js-tweaks/src/syntax/types.rkt:18:0 ----------------------------------------------------------------- for-loop [74] 100.0% [89] 296(1.1%) 296(1.1%) fallback-update ...s/racket/private/dict.rkt:115:2 ----------------------------------------------------------------- dedup-children! [75] 7.8% loop [90] 92.2% [90] 5380(20.7%) 5380(20.7%) loop ...racket-7.0/collects/racket/list.rkt:434:17 loop [90] 92.2% ----------------------------------------------------------------- custom-set-union [77] 100.0% [91] 1552(6.0%) 960(3.7%) for-loop ...cts/racket/private/set-types.rkt:174:3 for-loop [99] 38.1% ----------------------------------------------------------------- curry* [82] 100.0% [92] 596(2.3%) 596(2.3%) procedure-arity ...ket/private/norm-arity.rkt:7:27 ----------------------------------------------------------------- loop [76] 100.0% [93] 312(1.2%) 0(0.0%) eval-prog ...erbie/js-tweaks/src/programs.rkt:83:0 ??? [98] 100.0% ----------------------------------------------------------------- for-loop [78] 100.0% [94] 310(1.2%) 0(0.0%) ??? ...s/herbie/js-tweaks/src/core/ematch.rkt:43:5 for-loop [100] 100.0% ----------------------------------------------------------------- dedup-children! [75] 11.1% loop [95] 88.9% [95] 302(1.2%) 0(0.0%) loop ...racket-7.0/collects/racket/list.rkt:417:34 loop [95] 88.9% loop [101] 11.1% ----------------------------------------------------------------- custom-set-union! [86] 100.0% [96] 300(1.2%) 300(1.2%) for-loop ...cts/racket/private/set-types.rkt:253:4 ----------------------------------------------------------------- for-loop [87] 100.0% [97] 300(1.2%) 0(0.0%) atab-add-altn ...eaks/src/core/alt-table.rkt:202:0 errors [2] 100.0% ----------------------------------------------------------------- eval-prog [93] 10.6% ??? [29] 89.4% [98] 2956(11.4%) 704(2.7%) ??? ...tract/private/arrow-higher-order.rkt:361:33 ival-add [102] 65.6% ??? [103] 10.6% ----------------------------------------------------------------- for-loop [91] 100.0% [99] 592(2.3%) 592(2.3%) for-loop ...cts/racket/private/set-types.rkt:178:5 ----------------------------------------------------------------- ??? [94] 100.0% [100] 310(1.2%) 310(1.2%) for-loop ...bie/js-tweaks/src/core/ematch.rkt:44:7 ----------------------------------------------------------------- loop [95] 100.0% [101] 302(1.2%) 302(1.2%) loop (unknown source) ----------------------------------------------------------------- ??? [98] 100.0% [102] 1940(7.5%) 324(1.2%) ival-add ...bie/js-tweaks/src/biginterval.rkt:94:0 bfadd [104] 83.3% ----------------------------------------------------------------- ??? [98] 100.0% [103] 312(1.2%) 0(0.0%) ??? ...ects/racket/contract/private/prop.rkt:519:4 ??? [105] 100.0% ----------------------------------------------------------------- ival-add [102] 100.0% [104] 1616(6.2%) 0(0.0%) bfadd ...-lib/math/private/bigfloat/mpfr.rkt:821:4 new-mpfr [106] 81.6% ??? [107] 18.4% ----------------------------------------------------------------- ??? [103] 100.0% [105] 312(1.2%) 0(0.0%) ??? ...lects/racket/contract/private/orc.rkt:83:14 ??? [108] 100.0% ----------------------------------------------------------------- bf [60] 32.5% bfadd [104] 67.5% [106] 1954(7.5%) 1954(7.5%) new-mpfr ...b/math/private/bigfloat/mpfr.rkt:335:0 ----------------------------------------------------------------- bfadd [104] 48.7% bf [60] 51.3% [107] 612(2.4%) 612(2.4%) ??? /opt/racket-7.0/collects/ffi/unsafe.rkt:898:4 ----------------------------------------------------------------- ??? [105] 100.0% [108] 312(1.2%) 312(1.2%) ??? ...ects/racket/contract/private/list.rkt:163:5 -----------------------------------------------------------------