Profiling results ----------------- Total cpu time observed: 110302ms (out of 112644ms) Number of samples taken: 260 (once every 424ms) (Hiding functions with self<1.0% and local<2.0%: 4 of 108 hidden) ================================================================================== Caller Idx Total Self Name+src Local% ms(pct) ms(pct) Callee ================================================================================== ??? [4] 100.0% [1] 110302(100.0%) 0(0.0%) profile-thunk16 ...e/pkgs/profile-lib/main.rkt:9:0 run [3] 100.0% ---------------------------------------------------------------------------------- hash-ref! [62] 100.0% [2] 19762(17.9%) 0(0.0%) ??? ...htlies/herbie/master/src/programs.rkt:161:5 loop [51] 100.0% ---------------------------------------------------------------------------------- profile-thunk16 [1] 100.0% [3] 110302(100.0%) 0(0.0%) run ...et-7.2/share/pkgs/profile-lib/main.rkt:39:2 ??? [4] 100.0% ---------------------------------------------------------------------------------- for-loop [42] 0.1% for-loop [82] 0.5% run [3] 49.7% [4] 110302(100.0%) 1930(1.7%) ??? ...lects/racket/private/more-scheme.rkt:261:28 profile-thunk16 [1] 49.7% loop [7] 36.4% run-improve47 [5] 12.7% errors [71] 0.5% eval-errors [6] 0.2% ---------------------------------------------------------------------------------- ??? [4] 100.0% [5] 28086(25.5%) 0(0.0%) run-improve47 ...bie/master/src/mainloop.rkt:346:0 for-loop [8] 50.8% loop [7] 32.4% simplify! [14] 15.8% ??? [44] 1.0% ---------------------------------------------------------------------------------- ??? [4] 100.0% [6] 348(0.3%) 0(0.0%) eval-errors .../herbie/master/src/points.rkt:179:0 for-loop [9] 100.0% ---------------------------------------------------------------------------------- run-improve47 [5] 10.2% ??? [4] 89.8% [7] 89310(81.0%) 0(0.0%) loop ...ghtlies/herbie/master/src/points.rkt:277:2 loop [10] 46.6% make-exacts-walkup [12] 27.2% loop [13] 26.2% ---------------------------------------------------------------------------------- run-improve47 [5] 100.0% [8] 14260(12.9%) 0(0.0%) for-loop ...s/herbie/master/src/mainloop.rkt:365:4 run-iter! [11] 100.0% ---------------------------------------------------------------------------------- eval-errors [6] 100.0% [9] 348(0.3%) 348(0.3%) for-loop ...ies/herbie/master/src/points.rkt:181:2 ---------------------------------------------------------------------------------- loop [7] 100.0% [10] 41576(37.7%) 0(0.0%) loop ...ghtlies/herbie/master/src/points.rkt:240:2 make-exacts-walkup [12] 63.7% loop [13] 33.3% loop [15] 3.0% ---------------------------------------------------------------------------------- for-loop [8] 100.0% [11] 14260(12.9%) 0(0.0%) run-iter! .../herbie/master/src/mainloop.rkt:327:0 simplify! [14] 90.9% finalize-iter! [16] 4.6% localize! [17] 4.5% ---------------------------------------------------------------------------------- loop [7] 47.9% loop [10] 52.1% [12] 50784(46.0%) 0(0.0%) make-exacts-walkup .../master/src/points.rkt:218:0 loop [51] 57.1% eval-prog [18] 42.9% ---------------------------------------------------------------------------------- loop [10] 37.2% loop [7] 62.8% [13] 37270(33.8%) 0(0.0%) loop ...ghtlies/herbie/master/src/points.rkt:223:4 loop [51] 100.0% ---------------------------------------------------------------------------------- run-improve47 [5] 25.5% run-iter! [11] 74.5% [14] 17400(15.8%) 0(0.0%) simplify! .../herbie/master/src/mainloop.rkt:224:0 ??? [19] 100.0% ---------------------------------------------------------------------------------- loop [10] 0.4% loop [15] 99.6% [15] 1256(1.1%) 1256(1.1%) loop ...ghtlies/herbie/master/src/points.rkt:210:2 loop [15] 99.6% ---------------------------------------------------------------------------------- run-iter! [11] 100.0% [16] 656(0.6%) 0(0.0%) finalize-iter! ...ie/master/src/mainloop.rkt:278:0 ??? [44] 100.0% ---------------------------------------------------------------------------------- run-iter! [11] 100.0% [17] 642(0.6%) 0(0.0%) localize! .../herbie/master/src/mainloop.rkt:127:0 localize-error [20] 100.0% ---------------------------------------------------------------------------------- errors [71] 2.9% make-exacts-walkup [12] 97.1% [18] 22444(20.3%) 0(0.0%) eval-prog ...s/herbie/master/src/programs.rkt:83:0 hash-ref! [62] 95.7% temp85_0 [22] 4.3% ---------------------------------------------------------------------------------- simplify! [14] 100.0% [19] 17400(15.8%) 0(0.0%) ??? ...es/herbie/master/src/core/simplify.rkt:31:0 for-loop [21] 94.9% loop [24] 5.1% ---------------------------------------------------------------------------------- localize! [17] 100.0% [20] 642(0.6%) 0(0.0%) localize-error ...aster/src/core/localize.rkt:66:0 hash-ref! [62] 100.0% ---------------------------------------------------------------------------------- ??? [19] 100.0% [21] 16516(15.0%) 0(0.0%) for-loop ...rbie/master/src/core/simplify.rkt:51:2 ??? [23] 93.0% loop [24] 3.6% precompute-phase [26] 3.4% ---------------------------------------------------------------------------------- eval-prog [18] 100.0% [22] 974(0.9%) 0(0.0%) temp85_0 (unknown source) compile15 [25] 100.0% ---------------------------------------------------------------------------------- for-loop [21] 100.0% [23] 15364(13.9%) 0(0.0%) ??? ...es/herbie/master/src/core/simplify.rkt:92:0 find-matches [27] 75.7% for-loop [28] 24.3% ---------------------------------------------------------------------------------- for-loop [21] 40.1% ??? [19] 59.9% [24] 1476(1.3%) 0(0.0%) loop ...herbie/master/src/core/extraction.rkt:25:2 for-loop [29] 100.0% ---------------------------------------------------------------------------------- temp85_0 [22] 100.0% [25] 974(0.9%) 0(0.0%) compile15 (unknown source) temp91_0 [30] 100.0% ---------------------------------------------------------------------------------- for-loop [21] 100.0% [26] 560(0.5%) 0(0.0%) precompute-phase ...er/src/core/simplify.rkt:101:0 for-loop [31] 100.0% ---------------------------------------------------------------------------------- ??? [23] 100.0% [27] 11636(10.5%) 0(0.0%) find-matches .../master/src/core/simplify.rkt:84:0 for-loop [32] 100.0% ---------------------------------------------------------------------------------- ??? [23] 100.0% [28] 3728(3.4%) 0(0.0%) for-loop ...rbie/master/src/core/simplify.rkt:93:2 for-loop [33] 100.0% ---------------------------------------------------------------------------------- loop [24] 100.0% [29] 1476(1.3%) 0(0.0%) for-loop ...ie/master/src/core/extraction.rkt:29:4 for-loop [34] 100.0% ---------------------------------------------------------------------------------- compile15 [25] 100.0% [30] 974(0.9%) 0(0.0%) temp91_0 (unknown source) temp118_0 [35] 100.0% ---------------------------------------------------------------------------------- precompute-phase [26] 100.0% [31] 560(0.5%) 0(0.0%) for-loop ...bie/master/src/core/simplify.rkt:102:2 set-precompute! [36] 100.0% ---------------------------------------------------------------------------------- for-loop [32] 47.3% find-matches [27] 52.7% [32] 11636(10.5%) 632(0.6%) for-loop ...rbie/master/src/core/simplify.rkt:86:8 for-loop [32] 47.3% match-e [37] 46.1% ---------------------------------------------------------------------------------- for-loop [28] 100.0% [33] 3728(3.4%) 0(0.0%) for-loop ...rbie/master/src/core/simplify.rkt:96:4 merge-egraph-nodes! [38] 69.6% pattern-substitute [41] 15.6% mk-enode-rec! [65] 14.9% ---------------------------------------------------------------------------------- for-loop [29] 100.0% [34] 1476(1.3%) 604(0.5%) for-loop ...e/master/src/core/extraction.rkt:37:16 for-loop [40] 59.1% ---------------------------------------------------------------------------------- temp91_0 [30] 100.0% [35] 974(0.9%) 0(0.0%) temp118_0 (unknown source) expand-capturing-lifts [39] 100.0% ---------------------------------------------------------------------------------- for-loop [31] 100.0% [36] 560(0.5%) 0(0.0%) set-precompute! ...ter/src/core/simplify.rkt:110:0 for-loop [42] 100.0% ---------------------------------------------------------------------------------- for-loop [52] 22.0% for-loop [32] 78.0% [37] 10724(9.7%) 1760(1.6%) match-e .../herbie/master/src/core/ematch.rkt:39:0 for-loop [43] 81.7% constant? [46] 1.9% ??? [44] 0.9% variable? [47] 0.9% ---------------------------------------------------------------------------------- merge-egraph-nodes! [38] 11.1% for-loop [33] 88.9% [38] 2594(2.4%) 0(0.0%) merge-egraph-nodes! ...r/src/core/egraph.rkt:145:0 loop! [63] 67.2% update-leader! [48] 16.0% merge-egraph-nodes! [38] 11.1% dedup-children! [49] 5.7% ---------------------------------------------------------------------------------- temp118_0 [35] 100.0% [39] 974(0.9%) 0(0.0%) expand-capturing-lifts (unknown source) lambda-clause-expander [45] 100.0% ---------------------------------------------------------------------------------- for-loop [34] 100.0% [40] 872(0.8%) 872(0.8%) for-loop ...e/master/src/core/extraction.rkt:41:23 ---------------------------------------------------------------------------------- for-loop [33] 41.3% pattern-substitute [41] 58.7% [41] 580(0.5%) 276(0.3%) pattern-substitute ...er/src/core/matcher.rkt:46:0 pattern-substitute [41] 58.7% variable? [47] 17.5% ---------------------------------------------------------------------------------- set-precompute! [36] 100.0% [42] 560(0.5%) 0(0.0%) for-loop ...bie/master/src/core/simplify.rkt:112:2 setfindf [50] 51.4% ??? [4] 48.6% ---------------------------------------------------------------------------------- match-e [37] 100.0% [43] 9262(8.4%) 5114(4.6%) for-loop ...erbie/master/src/core/ematch.rkt:52:11 for-loop [52] 37.2% procedure-reduce-keyword-arity-mask [53] 12.6% loop [51] 3.2% ---------------------------------------------------------------------------------- run-improve47 [5] 23.1% match-e [37] 24.2% finalize-iter! [16] 52.6% [44] 1246(1.1%) 302(0.3%) ??? ...contract/private/arrow-val-first.rkt:390:18 for-loop [56] 52.6% make-alt-table [59] 23.1% ---------------------------------------------------------------------------------- expand-capturing-lifts [39] 100.0% [45] 974(0.9%) 0(0.0%) lambda-clause-expander (unknown source) finish-bodys [55] 100.0% ---------------------------------------------------------------------------------- match-e [37] 100.0% [46] 610(0.6%) 0(0.0%) constant? ...ie/master/src/syntax/syntax.rkt:726:0 value? [54] 100.0% ---------------------------------------------------------------------------------- match-e [37] 47.8% pattern-substitute [41] 52.2% [47] 582(0.5%) 0(0.0%) variable? ...ie/master/src/syntax/syntax.rkt:729:0 value? [54] 100.0% ---------------------------------------------------------------------------------- merge-egraph-nodes! [38] 100.0% [48] 554(0.5%) 278(0.3%) update-leader! ...master/src/core/egraph.rkt:213:0 for-loop [60] 49.8% ---------------------------------------------------------------------------------- merge-egraph-nodes! [38] 100.0% [49] 298(0.3%) 0(0.0%) dedup-children! ...master/src/core/enode.rkt:202:0 loop [57] 100.0% ---------------------------------------------------------------------------------- for-loop [42] 100.0% [50] 288(0.3%) 0(0.0%) setfindf ...ies/herbie/master/src/common.rkt:130:0 for-loop [58] 100.0% ---------------------------------------------------------------------------------- map [84] 0.0% for-loop [43] 0.1% make-exacts-walkup [12] 0.1% mk-enode-rec! [65] 0.3% loop [13] 0.4% loop! [63] 0.8% ??? [2] 22.3% loop [51] 76.0% [51] 88710(80.4%) 0(0.0%) loop ...-7.2/collects/racket/private/map.rkt:40:19 loop [51] 76.0% hash-ref! [62] 22.3% loop! [63] 0.8% composed [61] 0.5% mk-enode-rec! [65] 0.3% ??? [86] 0.0% ??? [69] 0.0% ??? [104] 0.0% ---------------------------------------------------------------------------------- for-loop [43] 100.0% [52] 4812(4.4%) 594(0.5%) for-loop ...erbie/master/src/core/ematch.rkt:58:37 match-e [37] 87.7% ---------------------------------------------------------------------------------- for-loop [43] 100.0% [53] 1468(1.3%) 1468(1.3%) procedure-reduce-keyword-arity-mask ....rkt:1562:4 ---------------------------------------------------------------------------------- variable? [47] 48.8% constant? [46] 51.2% [54] 1192(1.1%) 1192(1.1%) value? .../herbie/master/src/syntax/types.rkt:18:0 ---------------------------------------------------------------------------------- lambda-clause-expander [45] 4.8% for-loop [64] 95.2% [55] 974(0.9%) 0(0.0%) finish-bodys (unknown source) for-loop [64] 100.0% ---------------------------------------------------------------------------------- ??? [44] 100.0% [56] 656(0.6%) 0(0.0%) for-loop ...bie/master/src/core/alt-table.rkt:55:2 atab-add-altn [66] 51.8% errors [71] 48.2% ---------------------------------------------------------------------------------- dedup-children! [49] 7.1% loop [57] 92.9% [57] 298(0.3%) 298(0.3%) loop ...racket-7.2/collects/racket/list.rkt:434:17 loop [57] 92.9% ---------------------------------------------------------------------------------- setfindf [50] 100.0% [58] 288(0.3%) 288(0.3%) for-loop ...ies/herbie/master/src/common.rkt:131:2 ---------------------------------------------------------------------------------- ??? [44] 100.0% [59] 288(0.3%) 0(0.0%) make-alt-table ...ster/src/core/alt-table.rkt:32:0 for-loop [67] 100.0% ---------------------------------------------------------------------------------- update-leader! [48] 100.0% [60] 276(0.3%) 0(0.0%) for-loop ...erbie/master/src/core/egraph.rkt:218:6 for-loop [68] 100.0% ---------------------------------------------------------------------------------- loop [51] 100.0% [61] 64254(58.3%) 0(0.0%) composed ...ollects/racket/private/list.rkt:321:16 ??? [69] 100.0% ---------------------------------------------------------------------------------- localize-error [20] 0.5% map [84] 2.4% eval-prog [18] 24.0% loop [51] 73.1% [62] 22112(20.0%) 300(0.3%) hash-ref! .../racket/private/more-scheme.rkt:376:2 ??? [2] 73.1% bigfloat-hash [70] 23.8% parse-loop30 [74] 2.9% ---------------------------------------------------------------------------------- loop [51] 42.0% merge-egraph-nodes! [38] 58.0% [63] 1742(1.6%) 588(0.5%) loop! ...es/herbie/master/src/core/enode.rkt:194:2 loop [51] 42.0% set [72] 33.2% update-en-expr [77] 7.9% ---------------------------------------------------------------------------------- for-loop [64] 2.2% finish-bodys [55] 97.8% [64] 974(0.9%) 316(0.3%) for-loop (unknown source) finish-bodys [55] 93.2% syntax-e [73] 2.5% for-loop [64] 2.2% ---------------------------------------------------------------------------------- loop [51] 25.1% for-loop [33] 74.9% [65] 554(0.5%) 0(0.0%) mk-enode-rec! .../master/src/core/egraph.rkt:117:0 for-loop [75] 74.9% loop [51] 25.1% ---------------------------------------------------------------------------------- for-loop [56] 100.0% [66] 340(0.3%) 0(0.0%) atab-add-altn ...ster/src/core/alt-table.rkt:203:0 errors [71] 100.0% ---------------------------------------------------------------------------------- make-alt-table [59] 100.0% [67] 288(0.3%) 0(0.0%) for-loop ...ie/master/src/core/alt-table.rkt:38:31 ??? [76] 100.0% ---------------------------------------------------------------------------------- for-loop [60] 100.0% [68] 276(0.3%) 0(0.0%) for-loop ...erbie/master/src/core/egraph.rkt:219:8 hash-update! [78] 100.0% ---------------------------------------------------------------------------------- loop [51] 2.5% composed [61] 97.5% [69] 65904(59.7%) 1650(1.5%) ??? ...htlies/herbie/master/src/programs.rkt:115:2 ??? [79] 97.5% ---------------------------------------------------------------------------------- hash-ref! [62] 100.0% [70] 21170(19.2%) 0(0.0%) bigfloat-hash ...h/private/bigfloat/mpfr.rkt:167:0 bfcanonicalize [80] 87.8% sig+exp->bigfloat [81] 12.2% ---------------------------------------------------------------------------------- for-loop [56] 13.7% atab-add-altn [66] 14.7% ??? [4] 71.7% [71] 2314(2.1%) 0(0.0%) errors ...tlies/herbie/master/src/points.rkt:201:0 for-loop [82] 71.7% eval-prog [18] 28.3% ---------------------------------------------------------------------------------- loop! [63] 100.0% [72] 878(0.8%) 878(0.8%) set ...collects/racket/private/set-types.rkt:981:0 ---------------------------------------------------------------------------------- for-loop [64] 100.0% [73] 658(0.6%) 0(0.0%) syntax-e (unknown source) syntax-e/no-taint [83] 100.0% ---------------------------------------------------------------------------------- hash-ref! [62] 100.0% [74] 642(0.6%) 0(0.0%) parse-loop30 ...s/racket/match/compiler.rkt:418:15 map [84] 100.0% ---------------------------------------------------------------------------------- mk-enode-rec! [65] 100.0% [75] 554(0.5%) 554(0.5%) for-loop ...rbie/master/src/core/egraph.rkt:109:10 ---------------------------------------------------------------------------------- for-loop [67] 100.0% [76] 288(0.3%) 288(0.3%) ??? ...7.2/collects/racket/private/for.rkt:1233:14 ---------------------------------------------------------------------------------- loop! [63] 100.0% [77] 276(0.3%) 276(0.3%) update-en-expr ...master/src/core/egraph.rkt:207:0 ---------------------------------------------------------------------------------- for-loop [68] 100.0% [78] 276(0.3%) 0(0.0%) hash-update! ...cket/private/more-scheme.rkt:365:4 ??? [85] 100.0% ---------------------------------------------------------------------------------- ??? [69] 100.0% [79] 64254(58.3%) 0(0.0%) ??? ...t-7.2/collects/racket/private/kw.rkt:594:14 ??? [86] 95.3% ??? [98] 3.9% ---------------------------------------------------------------------------------- bigfloat-hash [70] 100.0% [80] 18586(16.9%) 18266(16.6%) bfcanonicalize .../private/bigfloat/mpfr.rkt:157:0 bigfloat->sig+exp [89] 1.7% ---------------------------------------------------------------------------------- bigfloat-hash [70] 100.0% [81] 2584(2.3%) 0(0.0%) sig+exp->bigfloat ...ivate/bigfloat/mpfr.rkt:387:0 new-mpfr [103] 75.1% integer->mpz [88] 24.9% ---------------------------------------------------------------------------------- errors [71] 100.0% [82] 1658(1.5%) 0(0.0%) for-loop ...ies/herbie/master/src/points.rkt:203:2 ??? [4] 100.0% ---------------------------------------------------------------------------------- syntax-e [73] 100.0% [83] 658(0.6%) 0(0.0%) syntax-e/no-taint (unknown source) loop [87] 100.0% ---------------------------------------------------------------------------------- parse-loop30 [74] 100.0% [84] 642(0.6%) 0(0.0%) map ...t-7.2/collects/racket/private/map.rkt:35:13 hash-ref! [62] 81.7% loop [51] 18.3% ---------------------------------------------------------------------------------- hash-update! [78] 100.0% [85] 276(0.3%) 0(0.0%) ??? ...es/herbie/master/src/core/egraph.rkt:221:24 for-loop [90] 100.0% ---------------------------------------------------------------------------------- loop [51] 1.0% ??? [79] 99.0% [86] 61856(56.1%) 322(0.3%) ??? ...tract/private/arrow-higher-order.rkt:364:33 bf-complex-mult [91] 86.4% bf-complex-add [92] 13.1% ---------------------------------------------------------------------------------- syntax-e/no-taint [83] 100.0% [87] 658(0.6%) 0(0.0%) loop (unknown source) gf [93] 100.0% ---------------------------------------------------------------------------------- sig+exp->bigfloat [81] 100.0% [88] 644(0.6%) 644(0.6%) integer->mpz ...math/private/bigfloat/gmp.rkt:87:0 ---------------------------------------------------------------------------------- bfcanonicalize [80] 100.0% [89] 320(0.3%) 0(0.0%) bigfloat->sig+exp ...ivate/bigfloat/mpfr.rkt:372:0 size+limbs->integer [94] 100.0% ---------------------------------------------------------------------------------- ??? [85] 100.0% [90] 276(0.3%) 276(0.3%) for-loop ...rbie/master/src/core/egraph.rkt:222:26 ---------------------------------------------------------------------------------- ??? [86] 100.0% [91] 53436(48.4%) 1198(1.1%) bf-complex-mult .../master/src/bigcomplex.rkt:30:0 bf* [95] 56.5% ??? [98] 39.4% ...higher-order.rkt:364:33 [96] 1.9% ---------------------------------------------------------------------------------- ??? [86] 100.0% [92] 8098(7.3%) 0(0.0%) bf-complex-add ...e/master/src/bigcomplex.rkt:23:0 ??? [98] 94.7% ...higher-order.rkt:364:33 [96] 5.3% ---------------------------------------------------------------------------------- loop [87] 100.0% [93] 658(0.6%) 0(0.0%) gf (unknown source) propagation-apply [97] 100.0% ---------------------------------------------------------------------------------- bigfloat->sig+exp [89] 100.0% [94] 320(0.3%) 320(0.3%) size+limbs->integer ...vate/bigfloat/gmp.rkt:103:0 ---------------------------------------------------------------------------------- bf-complex-mult [91] 100.0% [95] 30178(27.4%) 0(0.0%) bf* ...ath/private/bigfloat/bigfloat-mpfr.rkt:95:0 ??? [98] 100.0% ---------------------------------------------------------------------------------- bf-complex-add [92] 29.6% bf-complex-mult [91] 70.4% [96] 1448(1.3%) 0(0.0%) ...higher-order.rkt:364:33 (unknown source) ??? [99] 100.0% ---------------------------------------------------------------------------------- gf [93] 100.0% [97] 658(0.6%) 658(0.6%) propagation-apply (unknown source) ---------------------------------------------------------------------------------- ??? [79] 4.1% bf-complex-add [92] 12.5% bf-complex-mult [91] 34.3% bf* [95] 49.1% [98] 61426(55.7%) 5604(5.1%) ??? ...-racket/utils/simple-result-arrow.rkt:39:12 bfmul [100] 76.2% bfneg [101] 14.7% ---------------------------------------------------------------------------------- ...higher-order.rkt:364:33 [96] 100.0% [99] 1448(1.3%) 334(0.3%) ??? ...cts/racket/contract/private/list.rkt:209:10 ??? [102] 76.9% ---------------------------------------------------------------------------------- ??? [98] 100.0% [100] 46812(42.4%) 3048(2.8%) bfmul ...-lib/math/private/bigfloat/mpfr.rkt:821:4 new-mpfr [103] 62.5% ??? [104] 31.0% ---------------------------------------------------------------------------------- ??? [98] 100.0% [101] 9010(8.2%) 0(0.0%) bfneg ...-lib/math/private/bigfloat/mpfr.rkt:618:4 new-mpfr [103] 79.4% ??? [104] 20.6% ---------------------------------------------------------------------------------- ??? [99] 100.0% [102] 1114(1.0%) 1114(1.0%) ??? ...ects/racket/contract/private/guts.rkt:772:8 ---------------------------------------------------------------------------------- sig+exp->bigfloat [81] 5.1% bfneg [101] 18.6% bfmul [100] 76.3% [103] 38364(34.8%) 38364(34.8%) new-mpfr ...b/math/private/bigfloat/mpfr.rkt:335:0 ---------------------------------------------------------------------------------- loop [51] 2.2% bfneg [101] 11.1% bfmul [100] 86.7% [104] 16712(15.2%) 16712(15.2%) ??? /opt/racket-7.2/collects/ffi/unsafe.rkt:905:4 ----------------------------------------------------------------------------------