This is easy to reproduce. Download a file that's big enough to show the progress meter, but make your console super thin, so that the progress meter won't have space to render. Then you'll get a SEGFAULT. Here's the backtrace from the coredump:
Core was generated by `wget http://ddebs.ubuntu.com/ubuntu/dists/xenial/main/binary-amd64/Packages.xz'. Program terminated with signal SIGSEGV, Segmentation fault. #0 __memset_avx2 () at ../sysdeps/x86_64/multiarch/memset-avx2.S:161 161 ../sysdeps/x86_64/multiarch/memset-avx2.S: No such file or directory. (gdb) bt #0 __memset_avx2 () at ../sysdeps/x86_64/multiarch/memset-avx2.S:161 #1 0x000055ac0d9cb1c1 in memset (__len=18446744073709551611, __ch=32, __dest=0x55ac0de9f6d1) at /usr/include/x86_64-linux-gnu/bits/string3.h:90 #2 create_image (bp=bp@entry=0x55ac0de9f4d0, dl_total_time=dl_total_time@entry=0, done=done@entry=false) at ../../src/progress.c:1167 #3 0x000055ac0d9cb76e in bar_create (f_download=0x55ac0de981b0 "Packages.xz.1", initial=<optimized out>, total=<optimized out>) at ../../src/progress.c:602 #4 0x000055ac0d9ce862 in fd_read_body (downloaded_filename=<optimized out>, fd=fd@entry=3, out=out@entry=0x55ac0de9d290, toread=664828, startpos=<optimized out>, qtyread=qtyread@entry=0x7ffd5a788ee0, qtywritten=0x7ffd5a788e90, elapsed=0x7ffd5a788ee8, flags=1, out2=0x0) at ../../src/retr.c:274 #5 0x000055ac0d9be750 in read_response_body (hs=hs@entry=0x7ffd5a788e90, sock=sock@entry=3, fp=fp@entry=0x55ac0de9d290, contlen=contlen@entry=664828, contrange=contrange@entry=0, chunked_transfer_encoding=chunked_transfer_encoding@entry=false, url=0x55ac0de97900 "http://ddebs.ubuntu.com/ubuntu/dists/xenial/main/binary-amd64/Packages.xz";, warc_timestamp_str=0x7ffd5a788b70 "\377\377\377\377", warc_request_uuid=0x7ffd5a788b90 "@յ\366\331\177", warc_ip=0x0, type=0x0, statcode=200, head=0x55ac0de9cf90 "HTTP/1.1 200 OK\r\nDate: Wed, 11 May 2016 16:49:27 GMT\r\nServer: Apache/2.2.22 (Ubuntu)\r\nLast-Modified: Thu, 21 Apr 2016 15:16:07 GMT\r\nETag: \"a24fc-53100307fdbc0\"\r\nAccept-Ranges: bytes\r\nContent-Length: 6"...) at ../../src/http.c:1682 #6 0x000055ac0d9c3903 in gethttp (u=u@entry=0x55ac0de98b70, hs=hs@entry=0x7ffd5a788e90, dt=dt@entry=0x7ffd5a789268, proxy=proxy@entry=0x0, iri=iri@entry=0x55ac0de97b70, count=count@entry=1) at ../../src/http.c:3753 #7 0x000055ac0d9c467a in http_loop (u=u@entry=0x55ac0de98b70, original_url=original_url@entry=0x55ac0de98b70, newloc=newloc@entry=0x7ffd5a789188, local_file=local_file@entry=0x7ffd5a789190, referer=referer@entry=0x0, dt=dt@entry=0x7ffd5a789268, proxy=0x0, iri=0x55ac0de97b70) at ../../src/http.c:3971 #8 0x000055ac0d9cf494 in retrieve_url (orig_parsed=0x55ac0de98b70, origurl=0x55ac0de98540 "http://ddebs.ubuntu.com/ubuntu/dists/xenial/main/binary-amd64/Packages.xz";, file=0x7ffd5a789270, newloc=0x7ffd5a789278, refurl=0x0, dt=0x7ffd5a789268, recursive=false, iri=0x55ac0de97b70, register_status=true) at ../../src/retr.c:817 #9 0x000055ac0d9aa7c3 in main (argc=<optimized out>, argv=<optimized out>) at ../../src/main.c:1868 -- fREW Schmidt https://blog.afoolishmanifesto.com
