R Under development (unstable) (2026-05-08 r90017) -- "Unsuffered Consequences"
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> library(testthat)
> library(fastei)
> 
> test_check("fastei")
Applying a D'Hondt correction for correcting mismatches in W
Applying a D'Hondt correction for correcting mismatches in W
Applying a D'Hondt correction for correcting mismatches in W
=================================================================
==66603==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x602000061578 at pc 0x00010d1dbf08 bp 0x00016dd3d4f0 sp 0x00016dd3d4e8
WRITE of size 4 at 0x602000061578 thread T0
    #0 0x00010d1dbf04 in aggregateGroupsExhaustive dynamic_program.c:811
    #1 0x00010d24088c in groupAggGreedy(Rcpp::String, Rcpp::Vector<14, Rcpp::PreserveStorage>, Rcpp::Matrix<14, Rcpp::PreserveStorage>, Rcpp::Matrix<14, Rcpp::PreserveStorage>, Rcpp::Vector<13, Rcpp::PreserveStorage>, Rcpp::String, Rcpp::String, Rcpp::Vector<13, Rcpp::PreserveStorage>, Rcpp::Vector<14, Rcpp::PreserveStorage>, Rcpp::Vector<14, Rcpp::PreserveStorage>, Rcpp::Vector<14, Rcpp::PreserveStorage>, Rcpp::Vector<14, Rcpp::PreserveStorage>, Rcpp::Vector<10, Rcpp::PreserveStorage>, Rcpp::Vector<13, Rcpp::PreserveStorage>, Rcpp::Vector<13, Rcpp::PreserveStorage>, Rcpp::String, Rcpp::Vector<14, Rcpp::PreserveStorage>, Rcpp::Vector<13, Rcpp::PreserveStorage>, Rcpp::Vector<13, Rcpp::PreserveStorage>, Rcpp::String, Rcpp::Vector<10, Rcpp::PreserveStorage>) wrapper.cpp:423
    #2 0x00010d1b92a0 in _fastei_groupAggGreedy RcppExports.cpp:156
    #3 0x0001038cf690 in R_doDotCall dotcode.c
    #4 0x00010395e2b4 in do_dotcall dotcode.c:1437
    #5 0x000103b03fc4 in bcEval_loop eval.c:8150
    #6 0x000103ab3880 in bcEval eval.c:7533
    #7 0x000103ab1a8c in Rf_eval eval.c:1167
    #8 0x000103abc054 in R_execClosure eval.c:2398
    #9 0x000103ab72e8 in applyClosure_core eval.c:2314
    #10 0x000103ab55a0 in Rf_applyClosure eval.c:2333
    #11 0x000103ab23b8 in Rf_eval eval.c:1278
    #12 0x000103ac9e18 in do_set eval.c:3585
    #13 0x000103ab1e78 in Rf_eval eval.c:1230
    #14 0x000103ac5e50 in do_begin eval.c:3001
    #15 0x000103ab1e78 in Rf_eval eval.c:1230
    #16 0x000103acfbd4 in do_eval eval.c:3975
    #17 0x000103b03fc4 in bcEval_loop eval.c:8150
    #18 0x000103ab3880 in bcEval eval.c:7533
    #19 0x000103ab1a8c in Rf_eval eval.c:1167
    #20 0x000103abc054 in R_execClosure eval.c:2398
    #21 0x000103ab72e8 in applyClosure_core eval.c:2314
    #22 0x000103ab55a0 in Rf_applyClosure eval.c:2333
    #23 0x000103ab23b8 in Rf_eval eval.c:1278
    #24 0x000103ad0048 in do_eval eval.c:3993
    #25 0x000103b03fc4 in bcEval_loop eval.c:8150
    #26 0x000103ab3880 in bcEval eval.c:7533
    #27 0x000103ab1a8c in Rf_eval eval.c:1167
    #28 0x000103abc054 in R_execClosure eval.c:2398
    #29 0x000103ab72e8 in applyClosure_core eval.c:2314
    #30 0x000103ab9074 in R_forceAndCall eval.c:2465
    #31 0x0001036da33c in do_lapply apply.c:75
    #32 0x000103c859a8 in do_internal names.c:1424
    #33 0x000103af4728 in bcEval_loop eval.c:8170
    #34 0x000103ab3880 in bcEval eval.c:7533
    #35 0x000103ab1a8c in Rf_eval eval.c:1167
    #36 0x000103abc054 in R_execClosure eval.c:2398
    #37 0x000103ab72e8 in applyClosure_core eval.c:2314
    #38 0x000103ab55a0 in Rf_applyClosure eval.c:2333
    #39 0x000103ab23b8 in Rf_eval eval.c:1278
    #40 0x000103c083d0 in Rf_ReplIteration main.c:264
    #41 0x000103c0c434 in R_ReplConsole main.c:317
    #42 0x000103c0c230 in run_Rmainloop main.c:1235
    #43 0x000103c0c550 in Rf_mainloop main.c:1242
    #44 0x0001020b55ec in main Rmain.c:29
    #45 0x00018f6ebda0 in start+0x1b4c (dyld:arm64e+0x1fda0)

0x602000061578 is located 0 bytes after 8-byte region [0x602000061570,0x602000061578)
allocated by thread T0 here:
    #0 0x000104a41450 in calloc+0x80 (libclang_rt.asan_osx_dynamic.dylib:arm64e+0x41450)
    #1 0x000103c2f6bc in R_chk_calloc memory.c:3549
    #2 0x00010d24021c in groupAggGreedy(Rcpp::String, Rcpp::Vector<14, Rcpp::PreserveStorage>, Rcpp::Matrix<14, Rcpp::PreserveStorage>, Rcpp::Matrix<14, Rcpp::PreserveStorage>, Rcpp::Vector<13, Rcpp::PreserveStorage>, Rcpp::String, Rcpp::String, Rcpp::Vector<13, Rcpp::PreserveStorage>, Rcpp::Vector<14, Rcpp::PreserveStorage>, Rcpp::Vector<14, Rcpp::PreserveStorage>, Rcpp::Vector<14, Rcpp::PreserveStorage>, Rcpp::Vector<14, Rcpp::PreserveStorage>, Rcpp::Vector<10, Rcpp::PreserveStorage>, Rcpp::Vector<13, Rcpp::PreserveStorage>, Rcpp::Vector<13, Rcpp::PreserveStorage>, Rcpp::String, Rcpp::Vector<14, Rcpp::PreserveStorage>, Rcpp::Vector<13, Rcpp::PreserveStorage>, Rcpp::Vector<13, Rcpp::PreserveStorage>, Rcpp::String, Rcpp::Vector<10, Rcpp::PreserveStorage>) wrapper.cpp:414
    #3 0x00010d1b92a0 in _fastei_groupAggGreedy RcppExports.cpp:156
    #4 0x0001038cf690 in R_doDotCall dotcode.c
    #5 0x00010395e2b4 in do_dotcall dotcode.c:1437
    #6 0x000103b03fc4 in bcEval_loop eval.c:8150
    #7 0x000103ab3880 in bcEval eval.c:7533
    #8 0x000103ab1a8c in Rf_eval eval.c:1167
    #9 0x000103abc054 in R_execClosure eval.c:2398
    #10 0x000103ab72e8 in applyClosure_core eval.c:2314
    #11 0x000103ab55a0 in Rf_applyClosure eval.c:2333
    #12 0x000103ab23b8 in Rf_eval eval.c:1278
    #13 0x000103ac9e18 in do_set eval.c:3585
    #14 0x000103ab1e78 in Rf_eval eval.c:1230
    #15 0x000103ac5e50 in do_begin eval.c:3001
    #16 0x000103ab1e78 in Rf_eval eval.c:1230
    #17 0x000103acfbd4 in do_eval eval.c:3975
    #18 0x000103b03fc4 in bcEval_loop eval.c:8150
    #19 0x000103ab3880 in bcEval eval.c:7533
    #20 0x000103ab1a8c in Rf_eval eval.c:1167
    #21 0x000103abc054 in R_execClosure eval.c:2398
    #22 0x000103ab72e8 in applyClosure_core eval.c:2314
    #23 0x000103ab55a0 in Rf_applyClosure eval.c:2333
    #24 0x000103ab23b8 in Rf_eval eval.c:1278
    #25 0x000103ad0048 in do_eval eval.c:3993
    #26 0x000103b03fc4 in bcEval_loop eval.c:8150
    #27 0x000103ab3880 in bcEval eval.c:7533
    #28 0x000103ab1a8c in Rf_eval eval.c:1167
    #29 0x000103abc054 in R_execClosure eval.c:2398

SUMMARY: AddressSanitizer: heap-buffer-overflow dynamic_program.c:811 in aggregateGroupsExhaustive
Shadow bytes around the buggy address:
  0x602000061280: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd
  0x602000061300: fa fa fd fa fa fa fd fd fa fa fd fd fa fa fd fa
  0x602000061380: fa fa fd fd fa fa fd fa fa fa fd fd fa fa fd fd
  0x602000061400: fa fa fd fa fa fa fd fd fa fa fd fa fa fa fd fd
  0x602000061480: fa fa fd fa fa fa fd fa fa fa fd fa fa fa fd fa
=>0x602000061500: fa fa fd fa fa fa fd fa fa fa fd fa fa fa 00[fa]
  0x602000061580: fa fa 01 fa fa fa 00 fa fa fa fd fd fa fa 00 00
  0x602000061600: fa fa 00 00 fa fa fd fd fa fa fd fd fa fa fd fd
  0x602000061680: fa fa 00 00 fa fa 00 00 fa fa fd fd fa fa fd fd
  0x602000061700: fa fa fd fd fa fa 00 00 fa fa 00 00 fa fa fd fd
  0x602000061780: fa fa fd fd fa fa fd fd fa fa 00 00 fa fa 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==66603==ABORTING