Profiling results ----------------- Total cpu time observed: 8650ms (out of 8804ms) Number of samples taken: 42 (once every 206ms) ======================================================================== Caller Idx Total Self Name+src Local% ms(pct) ms(pct) Callee ======================================================================== [1] 8650(100.0%) 0(0.0%) ??? ...lects/racket/private/more-scheme.rkt:261:28 profile-thunk16 [5] 100.0% ------------------------------------------------------------------------ for-loop [91] 100.0% [2] 404(4.7%) 0(0.0%) syntax-e (unknown source) syntax-e/no-taint [7] 100.0% ------------------------------------------------------------------------ taylor [73] 100.0% [3] 240(2.8%) 0(0.0%) taylor-invert .../master/src/core/taylor.rkt:318:0 simplify [6] 100.0% ------------------------------------------------------------------------ matcher [70] 100.0% [4] 200(2.3%) 0(0.0%) ??? ...s/herbie/master/src/core/matcher.rkt:130:11 for-loop [8] 100.0% ------------------------------------------------------------------------ ??? [1] 100.0% [5] 8650(100.0%) 0(0.0%) profile-thunk16 ...e/pkgs/profile-lib/main.rkt:9:0 run [9] 100.0% ------------------------------------------------------------------------ hash-ref! [68] 30.1% taylor-log [80] 33.7% taylor-invert [3] 36.1% [6] 664(7.7%) 0(0.0%) simplify ...herbie/master/src/core/reduce.rkt:16:0 parse-loop80 [10] 66.3% f67 [11] 33.7% ------------------------------------------------------------------------ expand-id-application-form17 [98] 35.7% syntax-e [2] 64.3% [7] 628(7.3%) 0(0.0%) syntax-e/no-taint (unknown source) loop [92] 100.0% ------------------------------------------------------------------------ ??? [4] 100.0% [8] 200(2.3%) 0(0.0%) for-loop ...bie/master/src/core/matcher.rkt:132:15 matcher [70] 100.0% ------------------------------------------------------------------------ profile-thunk16 [5] 100.0% [9] 8650(100.0%) 0(0.0%) run ...et-7.5/share/pkgs/profile-lib/main.rkt:39:2 .../more-scheme.rkt:261:28 [12] 100.0% ------------------------------------------------------------------------ simplify [6] 100.0% [10] 440(5.1%) 0(0.0%) parse-loop80 (unknown source) eval-const-expr [13] 100.0% ------------------------------------------------------------------------ simplify [6] 100.0% [11] 224(2.6%) 0(0.0%) f67 (unknown source) eval-const-expr [13] 100.0% ------------------------------------------------------------------------ for-loop [67] 2.4% run [9] 97.6% [12] 8650(100.0%) 0(0.0%) .../more-scheme.rkt:261:28 (unknown source) prepare-points-intervals [14] 49.3% run-improve47 [15] 41.2% ??? [96] 2.4% eval-errors [16] 2.4% oracle-error [17] 2.4% get-final-combination [19] 2.3% ------------------------------------------------------------------------ f67 [11] 33.7% parse-loop80 [10] 66.3% [13] 664(7.7%) 0(0.0%) eval-const-expr ...e/master/src/programs.rkt:118:0 temp85_0 [72] 69.9% eval-one-top12 [18] 30.1% ------------------------------------------------------------------------ .../more-scheme.rkt:261:28 [12] 100.0% [14] 4266(49.3%) 0(0.0%) prepare-points-intervals ...r/src/points.rkt:110:0 loop [20] 100.0% ------------------------------------------------------------------------ .../more-scheme.rkt:261:28 [12] 100.0% [15] 3776(43.7%) 0(0.0%) run-improve47 ...bie/master/src/mainloop.rkt:346:0 for-loop [21] 100.0% ------------------------------------------------------------------------ .../more-scheme.rkt:261:28 [12] 100.0% [16] 206(2.4%) 0(0.0%) eval-errors .../herbie/master/src/points.rkt:179:0 for-loop [22] 100.0% ------------------------------------------------------------------------ .../more-scheme.rkt:261:28 [12] 100.0% [17] 204(2.4%) 0(0.0%) oracle-error ...herbie/master/src/points.rkt:188:0 for-loop [23] 100.0% ------------------------------------------------------------------------ eval-const-expr [13] 100.0% [18] 200(2.3%) 0(0.0%) eval-one-top12 (unknown source) for-loop [91] 100.0% ------------------------------------------------------------------------ .../more-scheme.rkt:261:28 [12] 100.0% [19] 198(2.3%) 0(0.0%) get-final-combination ...er/src/mainloop.rkt:371:0 infer-splitpoints [24] 100.0% ------------------------------------------------------------------------ prepare-points-intervals [14] 100.0% [20] 4266(49.3%) 400(4.6%) loop ...ghtlies/herbie/master/src/points.rkt:123:4 loop [26] 71.1% ??? [27] 19.5% ------------------------------------------------------------------------ run-improve47 [15] 100.0% [21] 3776(43.7%) 0(0.0%) for-loop ...s/herbie/master/src/mainloop.rkt:365:4 run-iter! [25] 100.0% ------------------------------------------------------------------------ eval-errors [16] 100.0% [22] 206(2.4%) 0(0.0%) for-loop ...ies/herbie/master/src/points.rkt:181:2 ??? [96] 100.0% ------------------------------------------------------------------------ oracle-error [17] 100.0% [23] 204(2.4%) 0(0.0%) for-loop ...ies/herbie/master/src/points.rkt:189:2 loop [92] 100.0% ------------------------------------------------------------------------ get-final-combination [19] 100.0% [24] 198(2.3%) 0(0.0%) infer-splitpoints ...ter/src/core/regimes.rkt:34:0 for-loop [28] 100.0% ------------------------------------------------------------------------ for-loop [21] 100.0% [25] 3776(43.7%) 0(0.0%) run-iter! .../herbie/master/src/mainloop.rkt:327:0 finalize-iter! [29] 48.4% simplify! [30] 18.0% gen-series! [31] 17.6% gen-rewrites! [32] 10.6% localize! [33] 5.5% ------------------------------------------------------------------------ loop [20] 100.0% [26] 3034(35.1%) 402(4.6%) loop ...ightlies/herbie/master/src/points.rkt:81:2 ??? [96] 86.8% ------------------------------------------------------------------------ loop [20] 100.0% [27] 832(9.6%) 0(0.0%) ??? ...ightlies/herbie/master/src/points.rkt:106:2 ??? [55] 75.7% procedure-reduce-arity [34] 24.3% ------------------------------------------------------------------------ infer-splitpoints [24] 100.0% [28] 198(2.3%) 0(0.0%) for-loop ...erbie/master/src/core/regimes.rkt:47:6 option-on-expr [35] 100.0% ------------------------------------------------------------------------ run-iter! [25] 100.0% [29] 1828(21.1%) 0(0.0%) finalize-iter! ...ie/master/src/mainloop.rkt:278:0 ??? [36] 100.0% ------------------------------------------------------------------------ run-iter! [25] 100.0% [30] 678(7.8%) 0(0.0%) simplify! .../herbie/master/src/mainloop.rkt:224:0 egraph-run [37] 100.0% ------------------------------------------------------------------------ run-iter! [25] 100.0% [31] 664(7.7%) 0(0.0%) gen-series! ...erbie/master/src/mainloop.rkt:160:0 for-loop [38] 100.0% ------------------------------------------------------------------------ run-iter! [25] 100.0% [32] 400(4.6%) 0(0.0%) gen-rewrites! ...bie/master/src/mainloop.rkt:183:0 for-loop [39] 100.0% ------------------------------------------------------------------------ run-iter! [25] 100.0% [33] 206(2.4%) 0(0.0%) localize! .../herbie/master/src/mainloop.rkt:127:0 localize-error [40] 100.0% ------------------------------------------------------------------------ ??? [27] 100.0% [34] 202(2.3%) 202(2.3%) procedure-reduce-arity ...t/private/kw.rkt:1725:11 ------------------------------------------------------------------------ for-loop [28] 100.0% [35] 198(2.3%) 0(0.0%) option-on-expr ...aster/src/core/regimes.rkt:126:0 err-lsts->split-indices [41] 100.0% ------------------------------------------------------------------------ finalize-iter! [29] 100.0% [36] 1828(21.1%) 0(0.0%) ??? ...contract/private/arrow-val-first.rkt:486:18 for-loop [42] 88.1% atab-add-altns [46] 11.9% ------------------------------------------------------------------------ simplify! [30] 100.0% [37] 678(7.8%) 0(0.0%) egraph-run ...bie/master/src/core/eggmath.rkt:51:0 egraph-add-exprs [43] 100.0% ------------------------------------------------------------------------ gen-series! [31] 100.0% [38] 664(7.7%) 0(0.0%) for-loop ...s/herbie/master/src/mainloop.rkt:167:7 taylor-alt [44] 100.0% ------------------------------------------------------------------------ gen-rewrites! [32] 100.0% [39] 400(4.6%) 0(0.0%) for-loop .../herbie/master/src/mainloop.rkt:191:11 rewrite-expression-head20 [45] 100.0% ------------------------------------------------------------------------ localize! [33] 100.0% [40] 206(2.4%) 0(0.0%) localize-error ...aster/src/core/localize.rkt:66:0 hash-ref! [68] 100.0% ------------------------------------------------------------------------ option-on-expr [35] 100.0% [41] 198(2.3%) 0(0.0%) err-lsts->split-indices .../core/regimes.rkt:262:0 loop [47] 100.0% ------------------------------------------------------------------------ ??? [36] 100.0% [42] 1610(18.6%) 0(0.0%) for-loop ...bie/master/src/core/alt-table.rkt:55:2 atab-add-altn [48] 37.6% errors [56] 37.5% loop [52] 12.4% override-at-pnts [53] 12.4% ------------------------------------------------------------------------ egraph-run [37] 100.0% [43] 678(7.8%) 0(0.0%) egraph-add-exprs ...ter/src/core/eggmath.rkt:113:0 ??? [49] 100.0% ------------------------------------------------------------------------ for-loop [38] 100.0% [44] 664(7.7%) 0(0.0%) taylor-alt ...herbie/master/src/mainloop.rkt:146:0 for-loop [50] 100.0% ------------------------------------------------------------------------ for-loop [39] 100.0% [45] 400(4.6%) 0(0.0%) rewrite-expression-head20 ...core/matcher.rkt:87:0 rewriter [51] 100.0% ------------------------------------------------------------------------ ??? [36] 100.0% [46] 218(2.5%) 0(0.0%) atab-add-altns ...ster/src/core/alt-table.rkt:49:0 atab-add-altn [48] 100.0% ------------------------------------------------------------------------ err-lsts->split-indices [41] 100.0% [47] 198(2.3%) 0(0.0%) loop ...s/herbie/master/src/core/regimes.rkt:313:4 for-loop [54] 100.0% ------------------------------------------------------------------------ atab-add-altns [46] 26.5% for-loop [42] 73.5% [48] 824(9.5%) 0(0.0%) atab-add-altn ...ster/src/core/alt-table.rkt:203:0 errors [56] 75.0% for-loop [59] 25.0% ------------------------------------------------------------------------ egraph-add-exprs [43] 100.0% [49] 678(7.8%) 0(0.0%) ??? ...es/herbie/master/src/core/simplify.rkt:72:6 for-loop [57] 100.0% ------------------------------------------------------------------------ taylor-alt [44] 100.0% [50] 664(7.7%) 0(0.0%) for-loop ...s/herbie/master/src/mainloop.rkt:152:6 ??? [55] 100.0% ------------------------------------------------------------------------ matcher [70] 33.3% rewrite-expression-head20 [45] 66.7% [51] 400(4.6%) 0(0.0%) rewriter ...erbie/master/src/core/matcher.rkt:90:2 *rules* [58] 66.7% for-loop [61] 33.3% ------------------------------------------------------------------------ for-loop [42] 100.0% [52] 200(2.3%) 200(2.3%) loop ...herbie/master/src/core/alt-table.rkt:177:2 ------------------------------------------------------------------------ for-loop [42] 100.0% [53] 200(2.3%) 0(0.0%) override-at-pnts ...r/src/core/alt-table.rkt:138:0 for-loop [60] 100.0% ------------------------------------------------------------------------ loop [47] 100.0% [54] 198(2.3%) 0(0.0%) for-loop ...rbie/master/src/core/regimes.rkt:278:4 for-loop [62] 100.0% ------------------------------------------------------------------------ loop [77] 5.2% loop [76] 5.2% location-do [64] 17.9% for-loop [50] 23.1% ??? [27] 48.7% [55] 1294(15.0%) 0(0.0%) ??? ...tract/private/arrow-higher-order.rkt:375:33 sample-multi-bounded [66] 48.7% location-do [64] 23.1% approximate9 [65] 23.1% hash-ref! [68] 5.2% ------------------------------------------------------------------------ for-loop [42] 49.4% atab-add-altn [48] 50.6% [56] 1222(14.1%) 0(0.0%) errors ...tlies/herbie/master/src/points.rkt:201:0 eval-prog [63] 65.8% for-loop [67] 34.2% ------------------------------------------------------------------------ ??? [49] 100.0% [57] 678(7.8%) 678(7.8%) for-loop ...rbie/master/src/core/simplify.rkt:91:2 ------------------------------------------------------------------------ rewriter [51] 100.0% [58] 400(4.6%) 0(0.0%) *rules* ...erbie/master/src/syntax/rules.rkt:666:0 for-loop [91] 100.0% ------------------------------------------------------------------------ atab-add-altn [48] 100.0% [59] 206(2.4%) 0(0.0%) for-loop ...ie/master/src/core/alt-table.rkt:119:2 ??? [69] 100.0% ------------------------------------------------------------------------ override-at-pnts [53] 100.0% [60] 200(2.3%) 200(2.3%) for-loop ...e/master/src/core/alt-table.rkt:139:22 ------------------------------------------------------------------------ rewriter [51] 100.0% [61] 200(2.3%) 0(0.0%) for-loop ...erbie/master/src/core/matcher.rkt:92:4 matcher [70] 100.0% ------------------------------------------------------------------------ for-loop [54] 100.0% [62] 198(2.3%) 0(0.0%) for-loop ...rbie/master/src/core/regimes.rkt:282:8 ??? [71] 100.0% ------------------------------------------------------------------------ errors [56] 100.0% [63] 804(9.3%) 0(0.0%) eval-prog ...s/herbie/master/src/programs.rkt:83:0 temp85_0 [72] 100.0% ------------------------------------------------------------------------ ??? [55] 42.5% location-do [64] 57.5% [64] 664(7.7%) 0(0.0%) location-do ...herbie/master/src/programs.rkt:64:0 location-do [64] 57.5% ??? [55] 34.9% loop [76] 7.5% ------------------------------------------------------------------------ ??? [55] 100.0% [65] 664(7.7%) 0(0.0%) approximate9 ...ie/master/src/core/taylor.rkt:12:0 taylor [73] 69.9% loop [77] 30.1% ------------------------------------------------------------------------ ??? [55] 100.0% [66] 630(7.3%) 202(2.3%) sample-multi-bounded ...master/src/points.rkt:15:0 for-loop [74] 67.9% ------------------------------------------------------------------------ errors [56] 100.0% [67] 418(4.8%) 0(0.0%) for-loop ...ies/herbie/master/src/points.rkt:203:2 .../more-scheme.rkt:261:28 [12] 100.0% ------------------------------------------------------------------------ localize-error [40] 12.7% ??? [78] 24.6% ??? [55] 24.6% map [81] 38.1% [68] 406(4.7%) 0(0.0%) hash-ref! .../racket/private/more-scheme.rkt:376:2 parse-loop30 [75] 50.7% ??? [78] 24.6% simplify [6] 24.6% ------------------------------------------------------------------------ for-loop [59] 100.0% [69] 206(2.4%) 206(2.4%) ??? ...7.5/collects/racket/private/for.rkt:1236:14 ------------------------------------------------------------------------ for-loop [8] 50.0% for-loop [61] 50.0% [70] 200(2.3%) 0(0.0%) matcher ...erbie/master/src/core/matcher.rkt:118:2 ??? [4] 50.0% rewriter [51] 50.0% ------------------------------------------------------------------------ for-loop [62] 100.0% [71] 198(2.3%) 198(2.3%) ??? ...cket-7.5/collects/racket/function.rkt:93:12 ------------------------------------------------------------------------ eval-const-expr [13] 36.6% eval-prog [63] 63.4% [72] 1268(14.7%) 0(0.0%) temp85_0 (unknown source) compile15 [79] 100.0% ------------------------------------------------------------------------ approximate9 [65] 41.4% taylor [73] 58.6% [73] 464(5.4%) 0(0.0%) taylor .../herbie/master/src/core/taylor.rkt:170:0 taylor [73] 58.6% taylor-log [80] 24.1% taylor-invert [3] 17.2% ------------------------------------------------------------------------ sample-multi-bounded [66] 100.0% [74] 428(4.9%) 428(4.9%) for-loop ...lies/herbie/master/src/points.rkt:23:4 ------------------------------------------------------------------------ hash-ref! [68] 100.0% [75] 206(2.4%) 0(0.0%) parse-loop30 (unknown source) map [81] 100.0% ------------------------------------------------------------------------ location-do [64] 100.0% [76] 200(2.3%) 0(0.0%) loop ...htlies/herbie/master/src/programs.rkt:73:4 ??? [55] 100.0% ------------------------------------------------------------------------ approximate9 [65] 100.0% [77] 200(2.3%) 0(0.0%) loop ...ies/herbie/master/src/core/taylor.rkt:87:4 ??? [55] 100.0% ------------------------------------------------------------------------ hash-ref! [68] 100.0% [78] 200(2.3%) 0(0.0%) ??? ...ies/herbie/master/src/core/taylor.rkt:45:15 hash-ref! [68] 100.0% ------------------------------------------------------------------------ temp85_0 [72] 100.0% [79] 1268(14.7%) 0(0.0%) compile15 (unknown source) temp91_0 [82] 100.0% ------------------------------------------------------------------------ taylor [73] 100.0% [80] 224(2.6%) 0(0.0%) taylor-log ...bie/master/src/core/taylor.rkt:503:0 simplify [6] 100.0% ------------------------------------------------------------------------ parse-loop30 [75] 100.0% [81] 206(2.4%) 0(0.0%) map ...t-7.5/collects/racket/private/map.rkt:35:13 hash-ref! [68] 75.0% loop [83] 25.0% ------------------------------------------------------------------------ compile15 [79] 100.0% [82] 1268(14.7%) 0(0.0%) temp91_0 (unknown source) temp118_0 [84] 84.2% compile-top9 [85] 15.8% ------------------------------------------------------------------------ map [81] 3.7% loop [83] 96.3% [83] 206(2.4%) 0(0.0%) loop ...-7.5/collects/racket/private/map.rkt:40:19 loop [83] 96.3% ??? [103] 3.7% ------------------------------------------------------------------------ temp91_0 [82] 100.0% [84] 1068(12.3%) 0(0.0%) temp118_0 (unknown source) expand-capturing-lifts [86] 100.0% ------------------------------------------------------------------------ temp91_0 [82] 100.0% [85] 200(2.3%) 0(0.0%) compile-top9 (unknown source) compile-forms33 [87] 100.0% ------------------------------------------------------------------------ temp118_0 [84] 100.0% [86] 1068(12.3%) 0(0.0%) expand-capturing-lifts (unknown source) lambda-clause-expander [88] 100.0% ------------------------------------------------------------------------ compile-top9 [85] 100.0% [87] 200(2.3%) 0(0.0%) compile-forms33 (unknown source) loop! [89] 100.0% ------------------------------------------------------------------------ expand-capturing-lifts [86] 100.0% [88] 1068(12.3%) 0(0.0%) lambda-clause-expander (unknown source) finish-bodys [90] 100.0% ------------------------------------------------------------------------ compile-forms33 [87] 100.0% [89] 200(2.3%) 0(0.0%) loop! (unknown source) for-loop [91] 100.0% ------------------------------------------------------------------------ lambda-clause-expander [88] 49.4% for-loop [91] 50.6% [90] 1068(12.3%) 0(0.0%) finish-bodys (unknown source) for-loop [91] 100.0% ------------------------------------------------------------------------ for-loop [91] 2.9% compile-let13 [101] 5.4% loop! [89] 5.4% eval-one-top12 [18] 10.7% *rules* [58] 21.4% finish-bodys [90] 54.3% [91] 1868(21.6%) 640(7.4%) for-loop (unknown source) finish-bodys [90] 26.4% loop [92] 12.0% compile5 [95] 10.7% ormap [94] 10.7% for-loop [91] 2.9% syntax-e [2] 1.9% dispatch-variable [93] 1.2% ------------------------------------------------------------------------ for-loop [91] 13.5% for-loop [23] 24.5% syntax-e/no-taint [7] 62.0% [92] 832(9.6%) 0(0.0%) loop (unknown source) gf [97] 62.0% ??? [96] 24.5% expand-id-application-form17 [98] 13.5% ------------------------------------------------------------------------ for-loop [91] 100.0% [93] 200(2.3%) 0(0.0%) dispatch-variable (unknown source) substitute-variable6 [99] 100.0% ------------------------------------------------------------------------ for-loop [91] 100.0% [94] 200(2.3%) 0(0.0%) ormap ....5/collects/racket/private/map.rkt:141:13 list-member? [100] 100.0% ------------------------------------------------------------------------ for-loop [91] 100.0% [95] 200(2.3%) 200(2.3%) compile5 (unknown source) compile-let13 [101] 50.0% ------------------------------------------------------------------------ loop [92] 5.9% for-loop [22] 6.0% .../more-scheme.rkt:261:28 [12] 12.1% loop [26] 76.1% [96] 3460(40.0%) 202(2.3%) ??? ...htlies/herbie/master/src/programs.rkt:115:2 ??? [102] 70.2% ??? [103] 23.9% ------------------------------------------------------------------------ loop [92] 100.0% [97] 628(7.3%) 0(0.0%) gf (unknown source) propagation-apply-shifted [104] 68.2% propagation-apply [105] 31.8% ------------------------------------------------------------------------ loop [92] 100.0% [98] 224(2.6%) 0(0.0%) expand-id-application-form17 (unknown source) syntax-e/no-taint [7] 100.0% ------------------------------------------------------------------------ dispatch-variable [93] 100.0% [99] 200(2.3%) 200(2.3%) substitute-variable6 (unknown source) ------------------------------------------------------------------------ ormap [94] 100.0% [100] 200(2.3%) 200(2.3%) list-member? ...llects/racket/private/set.rkt:24:0 ------------------------------------------------------------------------ compile5 [95] 25.0% compile-let13 [101] 75.0% [101] 200(2.3%) 0(0.0%) compile-let13 (unknown source) compile-let13 [101] 75.0% for-loop [91] 25.0% ------------------------------------------------------------------------ ??? [96] 100.0% [102] 2430(28.1%) 600(6.9%) ??? ...tract/private/arrow-higher-order.rkt:379:33 ival-div [106] 33.2% ival-log [107] 16.5% ival-sub [108] 16.5% ival-neg [109] 9.1% ------------------------------------------------------------------------ loop [83] 19.9% ??? [96] 80.1% [103] 1034(12.0%) 1034(12.0%) ??? .../herbie/master/src/syntax/syntax.rkt:214:17 ------------------------------------------------------------------------ gf [97] 100.0% [104] 428(4.9%) 428(4.9%) propagation-apply-shifted (unknown source) ------------------------------------------------------------------------ gf [97] 100.0% [105] 200(2.3%) 200(2.3%) propagation-apply (unknown source) ------------------------------------------------------------------------ ??? [102] 100.0% [106] 806(9.3%) 606(7.0%) ival-div ...erbie/master/src/biginterval.rkt:155:0 bfdiv [110] 24.8% ------------------------------------------------------------------------ ??? [102] 100.0% [107] 402(4.6%) 402(4.6%) ival-log ...erbie/master/src/biginterval.rkt:201:0 ------------------------------------------------------------------------ ??? [102] 100.0% [108] 400(4.6%) 0(0.0%) ival-sub ...erbie/master/src/biginterval.rkt:107:0 bfdiv [110] 100.0% ------------------------------------------------------------------------ ??? [102] 100.0% [109] 222(2.6%) 222(2.6%) ival-neg ...herbie/master/src/biginterval.rkt:97:0 ------------------------------------------------------------------------ ival-div [106] 33.3% ival-sub [108] 66.7% [110] 600(6.9%) 0(0.0%) bfdiv ...-lib/math/private/bigfloat/mpfr.rkt:835:4 new-mpfr [111] 66.7% ??? [112] 33.3% ------------------------------------------------------------------------ bfdiv [110] 100.0% [111] 400(4.6%) 400(4.6%) new-mpfr ...b/math/private/bigfloat/mpfr.rkt:348:0 ------------------------------------------------------------------------ bfdiv [110] 100.0% [112] 200(2.3%) 200(2.3%) ??? /opt/racket-7.5/collects/ffi/unsafe.rkt:938:4 ------------------------------------------------------------------------