Profiling results ----------------- Total cpu time observed: 42256ms (out of 42620ms) Number of samples taken: 183 (once every 231ms) (Hiding functions with self<1.0% and local<2.0%: 3 of 107 hidden) ========================================================================= Caller Idx Total Self Name+src Local% ms(pct) ms(pct) Callee ========================================================================= ??? [32] 100.0% [1] 41836(99.0%) 0(0.0%) profile-thunk14 ...t/pkgs/profile-lib/main.rkt:9:0 run [7] 100.0% ------------------------------------------------------------------------- ??? [32] 100.0% [2] 10604(25.1%) 0(0.0%) run-improve58 ...ock/herbie/src/mainloop.rkt:242:0 for-loop [8] 93.8% loop [38] 4.3% get-final-combination [13] 1.9% ------------------------------------------------------------------------- loop [88] 2.4% ??? [32] 97.6% [3] 8450(20.0%) 0(0.0%) simplify ...lock/herbie/src/core/simplify.rkt:39:0 simplify-expr [9] 42.2% for-loop [10] 36.9% iterate-egraph!5 [15] 20.9% ------------------------------------------------------------------------- loop [88] 100.0% [4] 416(1.0%) 0(0.0%) ??? ...ket/collects/racket/private/list.rkt:323:18 hash-ref! [75] 100.0% ------------------------------------------------------------------------- hash-ref! [75] 100.0% [5] 214(0.5%) 0(0.0%) ??? .../ztatlock/herbie/src/core/taylor.rkt:295:23 for-loop [12] 100.0% ------------------------------------------------------------------------- hash-ref! [75] 100.0% [6] 214(0.5%) 0(0.0%) ??? .../ztatlock/herbie/src/core/taylor.rkt:338:33 for-loop [11] 100.0% ------------------------------------------------------------------------- profile-thunk14 [1] 99.5% [7] 42036(99.5%) 0(0.0%) run ...share/racket/pkgs/profile-lib/main.rkt:31:2 ??? [32] 100.0% ------------------------------------------------------------------------- run-improve58 [2] 100.0% [8] 9942(23.5%) 0(0.0%) for-loop ...ztatlock/herbie/src/mainloop.rkt:253:8 run-iter! [14] 100.0% ------------------------------------------------------------------------- simplify [3] 100.0% [9] 3568(8.4%) 0(0.0%) simplify-expr ...herbie/src/core/simplify.rkt:68:0 iterate-egraph!5 [15] 94.3% loop [16] 5.7% ------------------------------------------------------------------------- simplify [3] 100.0% [10] 3116(7.4%) 0(0.0%) for-loop ...ock/herbie/src/core/simplify.rkt:61:12 iterate-egraph!5 [15] 87.2% loop [16] 12.8% ------------------------------------------------------------------------- ??? [6] 100.0% [11] 214(0.5%) 0(0.0%) for-loop ...lock/herbie/src/core/taylor.rkt:341:46 hash-ref! [75] 100.0% ------------------------------------------------------------------------- ??? [5] 100.0% [12] 214(0.5%) 0(0.0%) for-loop ...lock/herbie/src/core/taylor.rkt:298:27 hash-ref! [75] 100.0% ------------------------------------------------------------------------- run-improve58 [2] 100.0% [13] 202(0.5%) 0(0.0%) get-final-combination ...ie/src/mainloop.rkt:269:0 extract-alt [17] 100.0% ------------------------------------------------------------------------- for-loop [8] 100.0% [14] 9942(23.5%) 0(0.0%) run-iter! ...tatlock/herbie/src/mainloop.rkt:223:0 simplify! [18] 83.0% finalize-iter! [20] 6.5% gen-series! [22] 4.4% localize-error [23] 4.2% choose-best-alt! [25] 2.0% ------------------------------------------------------------------------- simplify [3] 22.5% for-loop [10] 34.6% simplify-expr [9] 42.9% [15] 7848(18.6%) 0(0.0%) iterate-egraph!5 ...bie/src/core/simplify.rkt:95:0 one-iter [19] 97.2% map-enodes [24] 2.8% ------------------------------------------------------------------------- simplify-expr [9] 33.6% for-loop [10] 66.4% [16] 602(1.4%) 0(0.0%) loop ...tatlock/herbie/src/core/simplify.rkt:203:2 pass [21] 100.0% ------------------------------------------------------------------------- get-final-combination [13] 100.0% [17] 202(0.5%) 0(0.0%) extract-alt ...e/ztatlock/herbie/src/glue.rkt:57:0 loop [88] 100.0% ------------------------------------------------------------------------- run-iter! [14] 100.0% [18] 8248(19.5%) 0(0.0%) simplify! ...tatlock/herbie/src/mainloop.rkt:162:0 for-loop [26] 100.0% ------------------------------------------------------------------------- iterate-egraph!5 [15] 100.0% [19] 7626(18.0%) 0(0.0%) one-iter ...ock/herbie/src/core/simplify.rkt:106:0 loop [27] 53.5% for-loop [28] 43.8% apply-match [33] 2.6% ------------------------------------------------------------------------- run-iter! [14] 100.0% [20] 644(1.5%) 0(0.0%) finalize-iter! ...ck/herbie/src/mainloop.rkt:177:0 ??? [29] 100.0% ------------------------------------------------------------------------- loop [16] 100.0% [21] 602(1.4%) 0(0.0%) pass ...tatlock/herbie/src/core/simplify.rkt:193:2 for-loop [30] 100.0% ------------------------------------------------------------------------- run-iter! [14] 100.0% [22] 434(1.0%) 0(0.0%) gen-series! ...tlock/herbie/src/mainloop.rkt:134:0 for-loop [31] 100.0% ------------------------------------------------------------------------- run-iter! [14] 100.0% [23] 416(1.0%) 0(0.0%) localize-error ...erbie/src/core/localize.rkt:47:0 hash-ref! [75] 100.0% ------------------------------------------------------------------------- iterate-egraph!5 [15] 100.0% [24] 222(0.5%) 0(0.0%) map-enodes ...ock/herbie/src/core/egraph.rkt:139:0 loop [88] 100.0% ------------------------------------------------------------------------- run-iter! [14] 100.0% [25] 200(0.5%) 0(0.0%) choose-best-alt! .../herbie/src/mainloop.rkt:120:0 ??? [29] 100.0% ------------------------------------------------------------------------- simplify! [18] 100.0% [26] 8248(19.5%) 0(0.0%) for-loop ...ztatlock/herbie/src/mainloop.rkt:166:6 ??? [32] 100.0% ------------------------------------------------------------------------- one-iter [19] 100.0% [27] 4080(9.7%) 0(0.0%) loop ...cket/collects/racket/private/map.rkt:53:19 apply-match [33] 100.0% ------------------------------------------------------------------------- for-loop [28] 50.0% one-iter [19] 50.0% [28] 3344(7.9%) 862(2.0%) for-loop ...ck/herbie/src/core/simplify.rkt:116:12 for-loop [28] 50.0% match-e [39] 37.1% ------------------------------------------------------------------------- choose-best-alt! [25] 23.7% finalize-iter! [20] 76.3% [29] 844(2.0%) 0(0.0%) ??? ...contract/private/arrow-val-first.rkt:357:18 for-loop [34] 76.3% atab-pick-alt8 [37] 23.7% ------------------------------------------------------------------------- pass [21] 100.0% [30] 602(1.4%) 0(0.0%) for-loop ...ck/herbie/src/core/simplify.rkt:196:29 for-loop [35] 100.0% ------------------------------------------------------------------------- gen-series! [22] 100.0% [31] 434(1.0%) 0(0.0%) for-loop ...ztatlock/herbie/src/mainloop.rkt:140:7 taylor-alt [36] 100.0% ------------------------------------------------------------------------- for-loop [26] 6.6% run [7] 46.8% [32] 42256(100.0%) 0(0.0%) ??? ...lects/racket/private/more-scheme.rkt:261:28 profile-thunk14 [1] 46.3% loop [38] 37.7% run-improve58 [2] 9.4% simplify [3] 6.6% ------------------------------------------------------------------------- one-iter [19] 4.7% loop [27] 95.3% [33] 4282(10.1%) 0(0.0%) apply-match .../herbie/src/core/simplify.rkt:122:2 merge-egraph-nodes! [40] 46.0% substitute-e [41] 19.2% loop! [48] 15.1% for-loop [44] 9.9% match-e [39] 9.8% ------------------------------------------------------------------------- ??? [29] 100.0% [34] 644(1.5%) 0(0.0%) for-loop ...ock/herbie/src/core/alt-table.rkt:51:2 atab-add-altn [42] 100.0% ------------------------------------------------------------------------- for-loop [30] 100.0% [35] 602(1.4%) 602(1.4%) for-loop ...ck/herbie/src/core/simplify.rkt:183:13 ------------------------------------------------------------------------- for-loop [31] 100.0% [36] 434(1.0%) 0(0.0%) taylor-alt ...e/ztatlock/herbie/src/glue.rkt:142:0 for-loop [43] 100.0% ------------------------------------------------------------------------- ??? [29] 100.0% [37] 200(0.5%) 0(0.0%) atab-pick-alt8 ...rbie/src/core/alt-table.rkt:54:0 ??? [45] 100.0% ------------------------------------------------------------------------- run-improve58 [2] 1.4% ??? [32] 98.6% [38] 32112(76.0%) 0(0.0%) loop /home/ztatlock/herbie/src/points.rkt:122:2 make-exacts* [55] 57.6% loop [46] 41.7% loop [56] 0.7% ------------------------------------------------------------------------- apply-match [33] 10.7% for-loop [59] 11.8% for-loop [28] 77.5% [39] 2902(6.9%) 2058(4.9%) match-e ...tatlock/herbie/src/core/ematch.rkt:46:0 for-loop [49] 38.6% for-loop [59] 2.3% ------------------------------------------------------------------------- apply-match [33] 100.0% [40] 1970(4.7%) 0(0.0%) merge-egraph-nodes! ...e/src/core/egraph.rkt:152:0 update-leader! [47] 79.6% loop! [48] 20.4% ------------------------------------------------------------------------- apply-match [33] 100.0% [41] 824(2.0%) 424(1.0%) substitute-e ...ck/herbie/src/core/ematch.rkt:71:0 mk-enode! [52] 48.5% ------------------------------------------------------------------------- for-loop [34] 100.0% [42] 644(1.5%) 0(0.0%) atab-add-altn ...rbie/src/core/alt-table.rkt:208:0 override-at-pnts [51] 65.5% best-and-tied-at-points [53] 34.5% ------------------------------------------------------------------------- taylor-alt [36] 100.0% [43] 434(1.0%) 0(0.0%) for-loop /home/ztatlock/herbie/src/glue.rkt:144:2 location-do [50] 100.0% ------------------------------------------------------------------------- apply-match [33] 100.0% [44] 422(1.0%) 0(0.0%) for-loop ...ck/herbie/src/core/simplify.rkt:136:10 loop! [48] 100.0% ------------------------------------------------------------------------- atab-pick-alt8 [37] 100.0% [45] 200(0.5%) 0(0.0%) ??? ...tract/private/arrow-higher-order.rkt:369:33 best-alt [54] 100.0% ------------------------------------------------------------------------- loop [38] 100.0% [46] 13380(31.7%) 0(0.0%) loop /home/ztatlock/herbie/src/points.rkt:93:2 loop [56] 63.9% make-exacts* [55] 34.6% eval-prog [73] 1.5% ------------------------------------------------------------------------- merge-egraph-nodes! [40] 100.0% [47] 1568(3.7%) 0(0.0%) update-leader! ...herbie/src/core/egraph.rkt:217:0 for-loop [57] 87.1% custom-set-union! [62] 12.9% ------------------------------------------------------------------------- merge-egraph-nodes! [40] 20.5% for-loop [44] 21.2% loop [88] 22.5% apply-match [33] 35.7% [48] 1470(3.5%) 220(0.5%) loop! .../ztatlock/herbie/src/core/enode.rkt:163:2 custom-set-union [58] 48.0% loop [88] 36.3% set [61] 8.2% ------------------------------------------------------------------------- match-e [39] 100.0% [49] 1464(3.5%) 624(1.5%) for-loop ...tlock/herbie/src/core/ematch.rkt:59:11 for-loop [59] 42.3% loop [88] 15.0% ------------------------------------------------------------------------- location-do [50] 33.8% for-loop [43] 66.2% [50] 434(1.0%) 0(0.0%) location-do ...tlock/herbie/src/programs.rkt:129:0 approximate9 [60] 66.2% location-do [50] 33.8% ------------------------------------------------------------------------- atab-add-altn [42] 100.0% [51] 422(1.0%) 0(0.0%) override-at-pnts ...e/src/core/alt-table.rkt:145:0 errors [70] 100.0% ------------------------------------------------------------------------- substitute-e [41] 100.0% [52] 400(0.9%) 400(0.9%) mk-enode! ...lock/herbie/src/core/egraph.rkt:101:0 ------------------------------------------------------------------------- atab-add-altn [42] 100.0% [53] 222(0.5%) 0(0.0%) best-and-tied-at-points ...ore/alt-table.rkt:122:0 errors [70] 100.0% ------------------------------------------------------------------------- ??? [45] 100.0% [54] 200(0.5%) 0(0.0%) best-alt /home/ztatlock/herbie/src/glue.rkt:79:0 loop [63] 100.0% ------------------------------------------------------------------------- loop [46] 20.0% loop [38] 80.0% [55] 23148(54.8%) 0(0.0%) make-exacts* ...tatlock/herbie/src/points.rkt:80:0 loop [88] 51.6% map [87] 47.4% eval-prog [73] 1.0% ------------------------------------------------------------------------- loop [38] 2.5% loop [46] 97.5% [56] 8764(20.7%) 0(0.0%) loop /home/ztatlock/herbie/src/points.rkt:83:4 map [87] 100.0% ------------------------------------------------------------------------- update-leader! [47] 100.0% [57] 1366(3.2%) 0(0.0%) for-loop ...tlock/herbie/src/core/egraph.rkt:222:6 for-loop [64] 100.0% ------------------------------------------------------------------------- loop! [48] 100.0% [58] 806(1.9%) 402(1.0%) custom-set-union ...et/private/set-types.rkt:168:0 for-loop [67] 25.1% for-loop [66] 25.1% ------------------------------------------------------------------------- match-e [39] 16.1% for-loop [49] 83.9% [59] 620(1.5%) 0(0.0%) for-loop ...tlock/herbie/src/core/ematch.rkt:65:37 match-e [39] 100.0% ------------------------------------------------------------------------- location-do [50] 100.0% [60] 434(1.0%) 0(0.0%) approximate9 ...ck/herbie/src/core/taylor.rkt:11:0 loop [65] 100.0% ------------------------------------------------------------------------- loop! [48] 100.0% [61] 242(0.6%) 242(0.6%) set ...collects/racket/private/set-types.rkt:982:0 ------------------------------------------------------------------------- update-leader! [47] 100.0% [62] 202(0.5%) 202(0.5%) custom-set-union! ...t/private/set-types.rkt:246:0 ------------------------------------------------------------------------- best-alt [54] 100.0% [63] 200(0.5%) 0(0.0%) loop /home/ztatlock/herbie/src/common.rkt:86:2 composed [68] 100.0% ------------------------------------------------------------------------- for-loop [57] 100.0% [64] 1366(3.2%) 0(0.0%) for-loop ...tlock/herbie/src/core/egraph.rkt:223:8 hash-update! [69] 100.0% ------------------------------------------------------------------------- approximate9 [60] 100.0% [65] 434(1.0%) 0(0.0%) loop ...e/ztatlock/herbie/src/core/taylor.rkt:82:4 hash-ref! [75] 100.0% ------------------------------------------------------------------------- custom-set-union [58] 100.0% [66] 202(0.5%) 202(0.5%) for-loop ...cts/racket/private/set-types.rkt:152:2 ------------------------------------------------------------------------- custom-set-union [58] 100.0% [67] 202(0.5%) 0(0.0%) for-loop ...cts/racket/private/set-types.rkt:174:3 for-loop [71] 100.0% ------------------------------------------------------------------------- loop [63] 100.0% [68] 200(0.5%) 0(0.0%) composed ...ollects/racket/private/list.rkt:321:16 errors [70] 100.0% ------------------------------------------------------------------------- for-loop [64] 100.0% [69] 1366(3.2%) 0(0.0%) hash-update! ...ket/private/more-scheme.rkt:362:13 ??? [72] 100.0% ------------------------------------------------------------------------- composed [68] 23.7% best-and-tied-at-points [53] 26.3% override-at-pnts [51] 50.0% [70] 844(2.0%) 202(0.5%) errors /home/ztatlock/herbie/src/points.rkt:144:0 for-loop [74] 50.0% eval-prog [73] 26.1% ------------------------------------------------------------------------- for-loop [67] 100.0% [71] 202(0.5%) 202(0.5%) for-loop ...cts/racket/private/set-types.rkt:178:5 ------------------------------------------------------------------------- hash-update! [69] 100.0% [72] 1366(3.2%) 0(0.0%) ??? .../ztatlock/herbie/src/core/egraph.rkt:225:24 for-loop [76] 85.2% make-sequence [79] 14.8% ------------------------------------------------------------------------- loop [46] 31.1% errors [70] 34.2% make-exacts* [55] 34.8% [73] 644(1.5%) 0(0.0%) eval-prog ...tatlock/herbie/src/programs.rkt:162:0 hash-ref! [75] 65.8% parse-lambda [78] 34.2% ------------------------------------------------------------------------- errors [70] 100.0% [74] 422(1.0%) 0(0.0%) for-loop ...e/ztatlock/herbie/src/points.rkt:147:4 ??? [77] 52.6% ??? [90] 47.4% ------------------------------------------------------------------------- for-loop [12] 4.2% for-loop [11] 4.2% eval-prog [73] 8.2% localize-error [23] 10.9% ??? [80] 12.8% loop [65] 12.8% ??? [4] 21.8% loop [88] 25.1% [75] 1274(3.0%) 0(0.0%) hash-ref! ...racket/private/more-scheme.rkt:373:13 parse-loop12 [84] 27.1% ??? [83] 25.1% ??? [80] 12.8% simplify [81] 12.8% bigfloat-hash [82] 8.2% f6 [85] 5.6% ??? [6] 4.2% ??? [5] 4.2% ------------------------------------------------------------------------- ??? [72] 100.0% [76] 1164(2.8%) 1164(2.8%) for-loop ...lock/herbie/src/core/egraph.rkt:226:26 ------------------------------------------------------------------------- for-loop [74] 100.0% [77] 222(0.5%) 222(0.5%) ??? ...ket/collects/racket/private/for.rkt:1150:14 ------------------------------------------------------------------------- eval-prog [73] 100.0% [78] 220(0.5%) 220(0.5%) parse-lambda ...llects/racket/private/kw.rkt:393:2 ------------------------------------------------------------------------- ??? [72] 100.0% [79] 202(0.5%) 202(0.5%) make-sequence ...ects/racket/private/for.rkt:508:2 ------------------------------------------------------------------------- hash-ref! [75] 100.0% [80] 434(1.0%) 0(0.0%) ??? ...e/ztatlock/herbie/src/core/taylor.rkt:42:15 hash-ref! [75] 100.0% ------------------------------------------------------------------------- hash-ref! [75] 100.0% [81] 434(1.0%) 0(0.0%) simplify ...atlock/herbie/src/core/reduce.rkt:18:0 f6 [85] 100.0% ------------------------------------------------------------------------- hash-ref! [75] 100.0% [82] 424(1.0%) 0(0.0%) bigfloat-hash ...h/private/bigfloat/mpfr.rkt:165:0 bfcanonicalize [86] 100.0% ------------------------------------------------------------------------- hash-ref! [75] 100.0% [83] 424(1.0%) 0(0.0%) ??? /home/ztatlock/herbie/src/programs.rkt:197:5 loop [88] 100.0% ------------------------------------------------------------------------- hash-ref! [75] 100.0% [84] 416(1.0%) 0(0.0%) parse-loop12 ...s/racket/match/compiler.rkt:410:15 loop [88] 100.0% ------------------------------------------------------------------------- map [87] 17.0% hash-ref! [75] 33.0% simplify [81] 50.0% [85] 648(1.5%) 214(0.5%) f6 ...et/collects/racket/match/compiler.rkt:499:40 map [87] 67.0% ------------------------------------------------------------------------- bigfloat-hash [82] 100.0% [86] 424(1.0%) 424(1.0%) bfcanonicalize .../private/bigfloat/mpfr.rkt:155:0 ------------------------------------------------------------------------- f6 [85] 2.2% loop [56] 43.4% make-exacts* [55] 54.4% [87] 20172(47.7%) 0(0.0%) map ...acket/collects/racket/private/map.rkt:21:13 loop [88] 97.9% ??? [90] 1.0% f6 [85] 0.5% make-multiplication-node [89] 0.5% ------------------------------------------------------------------------- parse-loop12 [84] 0.1% make-exacts* [55] 0.1% extract-alt [17] 0.3% for-loop [49] 0.3% map-enodes [24] 0.7% map [87] 0.7% loop! [48] 1.0% ??? [83] 1.3% loop [88] 95.6% [88] 33836(80.1%) 202(0.5%) loop ...cket/collects/racket/private/map.rkt:26:19 loop [88] 95.6% hash-ref! [75] 1.3% loop! [48] 1.0% ??? [90] 0.8% for-loop [91] 0.7% simplify [3] 0.3% ??? [4] 0.0% ??? [96] 0.0% ------------------------------------------------------------------------- map [87] 100.0% [89] 220(0.5%) 0(0.0%) make-multiplication-node .../core/reduce.rkt:221:0 make-multiplication-subnode [92]100.0% ------------------------------------------------------------------------- for-loop [74] 0.6% map [87] 0.6% loop [88] 98.7% [90] 31656(74.9%) 0(0.0%) ??? /home/ztatlock/herbie/src/programs.rkt:168:4 ??? [93] 96.3% real->bigfloat [94] 2.9% ??? [100] 0.7% ------------------------------------------------------------------------- loop [88] 100.0% [91] 222(0.5%) 0(0.0%) for-loop ...ock/herbie/src/core/simplify.rkt:161:2 setfindf [95] 100.0% ------------------------------------------------------------------------- make-multiplication-node [89] 100.0% [92] 220(0.5%) 220(0.5%) make-multiplication-subnode ...re/reduce.rkt:231:0 ------------------------------------------------------------------------- ??? [90] 100.0% [93] 30492(72.2%) 0(0.0%) ??? ...acket/collects/racket/private/kw.rkt:400:14 ??? [96] 98.6% ...higher-order.rkt:373:33 [97] 0.8% ------------------------------------------------------------------------- ??? [90] 100.0% [94] 928(2.2%) 710(1.7%) real->bigfloat .../private/bigfloat/mpfr.rkt:451:0 ??? [102] 23.5% ------------------------------------------------------------------------- for-loop [91] 100.0% [95] 222(0.5%) 222(0.5%) setfindf ...e/ztatlock/herbie/src/common.rkt:173:0 ------------------------------------------------------------------------- loop [88] 1.4% ??? [93] 98.6% [96] 30468(72.1%) 27508(65.1%) ??? ...-racket/utils/simple-result-arrow.rkt:26:12 bfadd [98] 5.9% bfcos [99] 2.4% ??? [101] 1.4% ------------------------------------------------------------------------- ??? [93] 100.0% [97] 240(0.6%) 0(0.0%) ...higher-order.rkt:373:33 (unknown source) ??? [100] 100.0% ------------------------------------------------------------------------- ??? [96] 100.0% [98] 1808(4.3%) 1158(2.7%) bfadd ...-lib/math/private/bigfloat/mpfr.rkt:819:4 ??? [102] 36.0% ------------------------------------------------------------------------- ??? [96] 100.0% [99] 716(1.7%) 716(1.7%) bfcos ...-lib/math/private/bigfloat/mpfr.rkt:616:4 ------------------------------------------------------------------------- ??? [90] 49.6% ...higher-order.rkt:373:33 [97] 50.4% [100] 476(1.1%) 0(0.0%) ??? ...ects/racket/contract/private/guts.rkt:638:8 ??? [101] 100.0% ------------------------------------------------------------------------- ??? [96] 47.8% ??? [100] 52.2% [101] 912(2.2%) 476(1.1%) ??? ...tract/private/arrow-higher-order.rkt:373:33 ??? [103] 25.7% ??? [104] 22.1% ------------------------------------------------------------------------- real->bigfloat [94] 25.1% bfadd [98] 74.9% [102] 868(2.1%) 868(2.1%) ??? .../share/racket/collects/ffi/unsafe.rkt:861:4 ------------------------------------------------------------------------- ??? [101] 100.0% [103] 234(0.6%) 234(0.6%) ??? ...llects/racket/contract/combinator.rkt:178:4 ------------------------------------------------------------------------- ??? [101] 100.0% [104] 202(0.5%) 202(0.5%) ??? ...ects/racket/contract/private/prop.rkt:489:4 -------------------------------------------------------------------------