Using minivec causes the fuzzer to SEGV.

[hbina]

Checkout branch feat/using-fuzzers-and-minivec.
Perform fuzzing with cargo +nightly fuzz run fuzz_target_1.
See that it SEGV on the simplest input.
Using standard Vec does not cause this problem.
I suspect the implementation of drain is faulty.

   Compiling applejack-fuzz v0.0.0 (/home/hbina/git/applejack/fuzz)
    Finished release [optimized] target(s) in 1.56s
    Finished release [optimized] target(s) in 0.00s
     Running `fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1 -artifact_prefix=/home/hbina/git/applejack/fuzz/artifacts/fuzz_target_1/ /home/hbina/git/applejack/fuzz/corpus/fuzz_target_1`
INFO: Running with entropic power schedule (0xFF, 100).
INFO: Seed: 1066036984
INFO: Loaded 1 modules   (1418 inline 8-bit counters): 1418 [0x55f184dbf712, 0x55f184dbfc9c), 
INFO: Loaded 1 PC tables (1418 PCs): 1418 [0x55f184dbfca0,0x55f184dc5540), 
INFO:     1623 files found in /home/hbina/git/applejack/fuzz/corpus/fuzz_target_1
INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 4096 bytes
INFO: seed corpus: files: 1623 min: 1b max: 4040b total: 471343b rss: 31Mb
AddressSanitizer:DEADLYSIGNAL
=================================================================
==135950==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x55f184c0958b bp 0x7ffd424b8570 sp 0x7ffd424b8000 T0)
==135950==The signal is caused by a WRITE memory access.
==135950==Hint: address points to the zero page.
    #0 0x55f184c0958b  (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0xec58b)
    #1 0x55f184c09981  (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0xec981)
    #2 0x55f184c0b922  (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0xee922)
    #3 0x55f184c1e260  (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0x101260)
    #4 0x55f184c1debf  (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0x100ebf)
    #5 0x55f184c28a28  (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0x10ba28)
    #6 0x55f184c2db90  (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0x110b90)
    #7 0x55f184c30446  (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0x113446)
    #8 0x55f184c308b7  (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0x1138b7)
    #9 0x55f184c1a557  (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0xfd557)
    #10 0x55f184b488d6  (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0x2b8d6)
    #11 0x7f208e600cb1  (/lib/x86_64-linux-gnu/libc.so.6+0x28cb1)
    #12 0x55f184b48a7d  (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0x2ba7d)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/home/hbina/git/applejack/fuzz/target/x86_64-unknown-linux-gnu/release/fuzz_target_1+0xec58b) 
==135950==ABORTING
MS: 0 ; base unit: 0000000000000000000000000000000000000000
0xe6,0xa4,
\xe6\xa4
artifact_prefix='/home/hbina/git/applejack/fuzz/artifacts/fuzz_target_1/'; Test unit written to /home/hbina/git/applejack/fuzz/artifacts/fuzz_target_1/crash-51943bd7f498abd3bde33971a15101f8445fe8d1
Base64: 5qQ=

────────────────────────────────────────────────────────────────────────────────

Failing input:

	fuzz/artifacts/fuzz_target_1/crash-51943bd7f498abd3bde33971a15101f8445fe8d1

Output of `std::fmt::Debug`:

	[230, 164]

Reproduce with:

	cargo fuzz run fuzz_target_1 fuzz/artifacts/fuzz_target_1/crash-51943bd7f498abd3bde33971a15101f8445fe8d1

Minimize test case with:

	cargo fuzz tmin fuzz_target_1 fuzz/artifacts/fuzz_target_1/crash-51943bd7f498abd3bde33971a15101f8445fe8d1

────────────────────────────────────────────────────────────────────────────────

Error: Fuzz target exited with exit code: 1

[hbina]

Fix awaiting author approval cmazakas/minivec#19