Dec 06 01:44:01.209 INFO testing dfockler/cryptopals against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 06 01:44:01.210 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-6/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +906deae0790bd18681b937fe9a141a3c26cf1855-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 01:44:01.454 INFO [stdout] 4f4c41f5ee60ba419daddf2ba37ac76eb1266968d233a2bcd6c9384bbf30389c
Dec 06 01:44:01.460 INFO running `"docker" "start" "-a" "4f4c41f5ee60ba419daddf2ba37ac76eb1266968d233a2bcd6c9384bbf30389c"`
Dec 06 01:44:01.957 INFO [stderr] usermod: no changes
Dec 06 01:44:02.068 INFO [stderr]    Compiling cryptopals v0.1.0 (/source)
Dec 06 01:44:02.624 INFO [stderr] warning: function is never used: `challenge1`
Dec 06 01:44:02.624 INFO [stderr]   --> src/main.rs:20:1
Dec 06 01:44:02.624 INFO [stderr]    |
Dec 06 01:44:02.624 INFO [stderr] 20 | fn challenge1() {
Dec 06 01:44:02.624 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 01:44:02.624 INFO [stderr]    |
Dec 06 01:44:02.624 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 01:44:02.624 INFO [stderr] 
Dec 06 01:44:02.624 INFO [stderr] warning: function is never used: `challenge2`
Dec 06 01:44:02.625 INFO [stderr]   --> src/main.rs:27:1
Dec 06 01:44:02.625 INFO [stderr]    |
Dec 06 01:44:02.625 INFO [stderr] 27 | fn challenge2() {
Dec 06 01:44:02.625 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 01:44:02.625 INFO [stderr] 
Dec 06 01:44:02.625 INFO [stderr] warning: function is never used: `challenge3`
Dec 06 01:44:02.625 INFO [stderr]   --> src/main.rs:36:1
Dec 06 01:44:02.625 INFO [stderr]    |
Dec 06 01:44:02.625 INFO [stderr] 36 | fn challenge3() {
Dec 06 01:44:02.625 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 01:44:02.625 INFO [stderr] 
Dec 06 01:44:02.625 INFO [stderr] warning: function is never used: `challenge4`
Dec 06 01:44:02.625 INFO [stderr]   --> src/main.rs:43:1
Dec 06 01:44:02.625 INFO [stderr]    |
Dec 06 01:44:02.625 INFO [stderr] 43 | fn challenge4() {
Dec 06 01:44:02.625 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 01:44:02.625 INFO [stderr] 
Dec 06 01:44:02.625 INFO [stderr] warning: function is never used: `challenge5`
Dec 06 01:44:02.625 INFO [stderr]   --> src/main.rs:61:1
Dec 06 01:44:02.625 INFO [stderr]    |
Dec 06 01:44:02.625 INFO [stderr] 61 | fn challenge5() {
Dec 06 01:44:02.625 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 01:44:02.625 INFO [stderr] 
Dec 06 01:44:02.625 INFO [stderr] warning: function is never used: `challenge6`
Dec 06 01:44:02.625 INFO [stderr]   --> src/main.rs:69:1
Dec 06 01:44:02.625 INFO [stderr]    |
Dec 06 01:44:02.625 INFO [stderr] 69 | fn challenge6() {
Dec 06 01:44:02.625 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 01:44:02.625 INFO [stderr] 
Dec 06 01:44:02.625 INFO [stderr] warning: function is never used: `top_scored_value`
Dec 06 01:44:02.625 INFO [stderr]    --> src/main.rs:214:1
Dec 06 01:44:02.625 INFO [stderr]     |
Dec 06 01:44:02.625 INFO [stderr] 214 | fn top_scored_value(input: &[u8]) -> (i32, String, u8) {
Dec 06 01:44:02.625 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:02.625 INFO [stderr] 
Dec 06 01:44:02.625 INFO [stderr] warning: function is never used: `score_string`
Dec 06 01:44:02.625 INFO [stderr]    --> src/main.rs:237:1
Dec 06 01:44:02.625 INFO [stderr]     |
Dec 06 01:44:02.625 INFO [stderr] 237 | fn score_string(input: &String) -> i32 {
Dec 06 01:44:02.625 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:02.625 INFO [stderr] 
Dec 06 01:44:02.625 INFO [stderr] warning: function is never used: `hex_to_bytes`
Dec 06 01:44:02.625 INFO [stderr]    --> src/main.rs:275:1
Dec 06 01:44:02.625 INFO [stderr]     |
Dec 06 01:44:02.625 INFO [stderr] 275 | fn hex_to_bytes(input: &str) -> Vec<u8> {
Dec 06 01:44:02.625 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:02.625 INFO [stderr] 
Dec 06 01:44:02.625 INFO [stderr] warning: function is never used: `hex_to_base64`
Dec 06 01:44:02.625 INFO [stderr]    --> src/main.rs:279:1
Dec 06 01:44:02.625 INFO [stderr]     |
Dec 06 01:44:02.625 INFO [stderr] 279 | fn hex_to_base64(input: &str) -> String {
Dec 06 01:44:02.625 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:02.625 INFO [stderr] 
Dec 06 01:44:02.625 INFO [stderr] warning: function is never used: `xor`
Dec 06 01:44:02.625 INFO [stderr]    --> src/main.rs:283:1
Dec 06 01:44:02.625 INFO [stderr]     |
Dec 06 01:44:02.625 INFO [stderr] 283 | fn xor(a: &Vec<u8>, b: &Vec<u8>) -> String {
Dec 06 01:44:02.625 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:02.625 INFO [stderr] 
Dec 06 01:44:02.625 INFO [stderr] warning: function is never used: `single_xor`
Dec 06 01:44:02.625 INFO [stderr]    --> src/main.rs:293:1
Dec 06 01:44:02.625 INFO [stderr]     |
Dec 06 01:44:02.625 INFO [stderr] 293 | fn single_xor(input: &[u8], value: u8) -> Vec<u8> {
Dec 06 01:44:02.625 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:02.625 INFO [stderr] 
Dec 06 01:44:02.625 INFO [stderr] warning: function is never used: `repeating_xor`
Dec 06 01:44:02.625 INFO [stderr]    --> src/main.rs:303:1
Dec 06 01:44:02.626 INFO [stderr]     |
Dec 06 01:44:02.626 INFO [stderr] 303 | fn repeating_xor(input: &str, key: &str) -> Vec<u8> {
Dec 06 01:44:02.626 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:02.626 INFO [stderr] 
Dec 06 01:44:02.626 INFO [stderr] warning: function is never used: `repeating_xor_decode`
Dec 06 01:44:02.626 INFO [stderr]    --> src/main.rs:315:1
Dec 06 01:44:02.626 INFO [stderr]     |
Dec 06 01:44:02.626 INFO [stderr] 315 | fn repeating_xor_decode(input: &[u8], key: &str) -> String {
Dec 06 01:44:02.626 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:02.626 INFO [stderr] 
Dec 06 01:44:02.626 INFO [stderr] warning: function is never used: `hamming_distance`
Dec 06 01:44:02.626 INFO [stderr]    --> src/main.rs:327:1
Dec 06 01:44:02.626 INFO [stderr]     |
Dec 06 01:44:02.626 INFO [stderr] 327 | fn hamming_distance(a: &[u8], b: &[u8]) -> u32 {
Dec 06 01:44:02.626 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:02.626 INFO [stderr] 
Dec 06 01:44:03.033 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.04s
Dec 06 01:44:03.067 INFO [stderr] su: No module specific data is present
Dec 06 01:44:03.736 INFO running `"docker" "inspect" "4f4c41f5ee60ba419daddf2ba37ac76eb1266968d233a2bcd6c9384bbf30389c"`
Dec 06 01:44:04.092 INFO running `"docker" "rm" "-f" "4f4c41f5ee60ba419daddf2ba37ac76eb1266968d233a2bcd6c9384bbf30389c"`
Dec 06 01:44:04.448 INFO [stdout] 4f4c41f5ee60ba419daddf2ba37ac76eb1266968d233a2bcd6c9384bbf30389c
Dec 06 01:44:04.452 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-6/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +906deae0790bd18681b937fe9a141a3c26cf1855-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 01:44:04.868 INFO [stdout] de2959067df15208178f9dd27b62b1481df5a81075d4f7c68e170fcb88cd0634
Dec 06 01:44:04.876 INFO running `"docker" "start" "-a" "de2959067df15208178f9dd27b62b1481df5a81075d4f7c68e170fcb88cd0634"`
Dec 06 01:44:05.731 INFO [stderr] usermod: no changes
Dec 06 01:44:05.808 INFO [stderr]    Compiling cryptopals v0.1.0 (/source)
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `challenge1`
Dec 06 01:44:06.497 INFO [stderr]   --> src/main.rs:20:1
Dec 06 01:44:06.497 INFO [stderr]    |
Dec 06 01:44:06.497 INFO [stderr] 20 | fn challenge1() {
Dec 06 01:44:06.497 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr]    |
Dec 06 01:44:06.497 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `challenge2`
Dec 06 01:44:06.497 INFO [stderr]   --> src/main.rs:27:1
Dec 06 01:44:06.497 INFO [stderr]    |
Dec 06 01:44:06.497 INFO [stderr] 27 | fn challenge2() {
Dec 06 01:44:06.497 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `challenge3`
Dec 06 01:44:06.497 INFO [stderr]   --> src/main.rs:36:1
Dec 06 01:44:06.497 INFO [stderr]    |
Dec 06 01:44:06.497 INFO [stderr] 36 | fn challenge3() {
Dec 06 01:44:06.497 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `challenge4`
Dec 06 01:44:06.497 INFO [stderr]   --> src/main.rs:43:1
Dec 06 01:44:06.497 INFO [stderr]    |
Dec 06 01:44:06.497 INFO [stderr] 43 | fn challenge4() {
Dec 06 01:44:06.497 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `challenge5`
Dec 06 01:44:06.497 INFO [stderr]   --> src/main.rs:61:1
Dec 06 01:44:06.497 INFO [stderr]    |
Dec 06 01:44:06.497 INFO [stderr] 61 | fn challenge5() {
Dec 06 01:44:06.497 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `challenge6`
Dec 06 01:44:06.497 INFO [stderr]   --> src/main.rs:69:1
Dec 06 01:44:06.497 INFO [stderr]    |
Dec 06 01:44:06.497 INFO [stderr] 69 | fn challenge6() {
Dec 06 01:44:06.497 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `top_scored_value`
Dec 06 01:44:06.497 INFO [stderr]    --> src/main.rs:214:1
Dec 06 01:44:06.497 INFO [stderr]     |
Dec 06 01:44:06.497 INFO [stderr] 214 | fn top_scored_value(input: &[u8]) -> (i32, String, u8) {
Dec 06 01:44:06.497 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `score_string`
Dec 06 01:44:06.497 INFO [stderr]    --> src/main.rs:237:1
Dec 06 01:44:06.497 INFO [stderr]     |
Dec 06 01:44:06.497 INFO [stderr] 237 | fn score_string(input: &String) -> i32 {
Dec 06 01:44:06.497 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `hex_to_bytes`
Dec 06 01:44:06.497 INFO [stderr]    --> src/main.rs:275:1
Dec 06 01:44:06.497 INFO [stderr]     |
Dec 06 01:44:06.497 INFO [stderr] 275 | fn hex_to_bytes(input: &str) -> Vec<u8> {
Dec 06 01:44:06.497 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `hex_to_base64`
Dec 06 01:44:06.497 INFO [stderr]    --> src/main.rs:279:1
Dec 06 01:44:06.497 INFO [stderr]     |
Dec 06 01:44:06.497 INFO [stderr] 279 | fn hex_to_base64(input: &str) -> String {
Dec 06 01:44:06.497 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `xor`
Dec 06 01:44:06.497 INFO [stderr]    --> src/main.rs:283:1
Dec 06 01:44:06.497 INFO [stderr]     |
Dec 06 01:44:06.497 INFO [stderr] 283 | fn xor(a: &Vec<u8>, b: &Vec<u8>) -> String {
Dec 06 01:44:06.497 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `single_xor`
Dec 06 01:44:06.497 INFO [stderr]    --> src/main.rs:293:1
Dec 06 01:44:06.497 INFO [stderr]     |
Dec 06 01:44:06.497 INFO [stderr] 293 | fn single_xor(input: &[u8], value: u8) -> Vec<u8> {
Dec 06 01:44:06.497 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.497 INFO [stderr] warning: function is never used: `repeating_xor`
Dec 06 01:44:06.497 INFO [stderr]    --> src/main.rs:303:1
Dec 06 01:44:06.497 INFO [stderr]     |
Dec 06 01:44:06.497 INFO [stderr] 303 | fn repeating_xor(input: &str, key: &str) -> Vec<u8> {
Dec 06 01:44:06.497 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:06.497 INFO [stderr] 
Dec 06 01:44:06.498 INFO [stderr] warning: function is never used: `repeating_xor_decode`
Dec 06 01:44:06.498 INFO [stderr]    --> src/main.rs:315:1
Dec 06 01:44:06.498 INFO [stderr]     |
Dec 06 01:44:06.498 INFO [stderr] 315 | fn repeating_xor_decode(input: &[u8], key: &str) -> String {
Dec 06 01:44:06.498 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:06.498 INFO [stderr] 
Dec 06 01:44:06.498 INFO [stderr] warning: function is never used: `hamming_distance`
Dec 06 01:44:06.498 INFO [stderr]    --> src/main.rs:327:1
Dec 06 01:44:06.498 INFO [stderr]     |
Dec 06 01:44:06.498 INFO [stderr] 327 | fn hamming_distance(a: &[u8], b: &[u8]) -> u32 {
Dec 06 01:44:06.498 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 01:44:06.498 INFO [stderr] 
Dec 06 01:44:06.798 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
Dec 06 01:44:06.801 INFO [stderr] su: No module specific data is present
Dec 06 01:44:07.266 INFO running `"docker" "inspect" "de2959067df15208178f9dd27b62b1481df5a81075d4f7c68e170fcb88cd0634"`
Dec 06 01:44:07.368 INFO running `"docker" "rm" "-f" "de2959067df15208178f9dd27b62b1481df5a81075d4f7c68e170fcb88cd0634"`
Dec 06 01:44:07.439 INFO [stdout] de2959067df15208178f9dd27b62b1481df5a81075d4f7c68e170fcb88cd0634
Dec 06 01:44:07.442 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-6/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +906deae0790bd18681b937fe9a141a3c26cf1855-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 01:44:07.758 INFO [stdout] 04692810f3fe7e9d4c49c0649e021d968c531d589137cdb14b49a79b42366d1a
Dec 06 01:44:07.761 INFO running `"docker" "start" "-a" "04692810f3fe7e9d4c49c0649e021d968c531d589137cdb14b49a79b42366d1a"`
Dec 06 01:44:08.295 INFO [stderr] usermod: no changes
Dec 06 01:44:08.342 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
Dec 06 01:44:08.347 INFO [stderr]      Running /target/debug/deps/cryptopals-5f25cb335b498ba0
Dec 06 01:44:08.368 INFO [stdout] 
Dec 06 01:44:08.368 INFO [stdout] running 0 tests
Dec 06 01:44:08.368 INFO [stdout] 
Dec 06 01:44:08.368 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 01:44:08.368 INFO [stdout] 
Dec 06 01:44:08.368 INFO [stderr] su: No module specific data is present
Dec 06 01:44:08.786 INFO running `"docker" "inspect" "04692810f3fe7e9d4c49c0649e021d968c531d589137cdb14b49a79b42366d1a"`
Dec 06 01:44:09.000 INFO running `"docker" "rm" "-f" "04692810f3fe7e9d4c49c0649e021d968c531d589137cdb14b49a79b42366d1a"`
Dec 06 01:44:09.323 INFO [stdout] 04692810f3fe7e9d4c49c0649e021d968c531d589137cdb14b49a79b42366d1a