作者：zf19920222 | 来源：互联网 | 2023-07-24 18:26
Rust Version
1
| rustc 1.40.0 (73528e339 2019-12-16) |
Affected Version of clap
Both
and
(from git)
Expected Behavior Summary
Clap should complain (to the writer of the app - not the end user of the interface) that one of the arguments requires an
that does not exist - i.e. has not been added to the
.
Actual Behavior Summary
Fatal internal error.
Steps to Reproduce the issue
See sample code below.
Sample Code or Link to Sample Code
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| rust
fn main() {
// The issue also persists when loading from yaml (where I originally found it)
// the only difference is that if we don&＃039;t give a name for the App, it doesn&＃039;t
// panic.
let app &＃061; clap::App::new("clap-issue-1644")
.arg(clap::Arg::with_name("foo")
// It doesn&＃039;t matter whether we use a short or long value here;
// clap still crashes
.long("foo")
.requires("missing-arg"));
app.get_matches();
} |
Debug output
Debug Output (v2.33.0)
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| DEBUG:clap:Parser::propagate_settings: self&＃061;clap-issue-1644, g_settings&＃061;AppFlags(
(empty),
)
DEBUG:clap:Parser::get_matches_with;
DEBUG:clap:Parser::create_help_and_version;
DEBUG:clap:Parser::create_help_and_version: Building --help
DEBUG:clap:Parser::create_help_and_version: Building --version
DEBUG:clap:Parser::get_matches_with: Begin parsing &＃039;"--foo"&＃039; ([45, 45, 102, 111, 111])
DEBUG:clap:Parser::is_new_arg:"--foo":NotFound
DEBUG:clap:Parser::is_new_arg: arg_allows_tac&＃061;false
DEBUG:clap:Parser::is_new_arg: -- found
DEBUG:clap:Parser::is_new_arg: starts_new_arg&＃061;true
DEBUG:clap:Parser::possible_subcommand: arg&＃061;"--foo"
DEBUG:clap:Parser::get_matches_with: possible_sc&＃061;false, sc&＃061;None
DEBUG:clap:ArgMatcher::process_arg_overrides:None;
DEBUG:clap:Parser::parse_long_arg;
DEBUG:clap:Parser::parse_long_arg: Does it contain &＃039;&＃061;&＃039;...No
DEBUG:clap:Parser::parse_long_arg: Found valid flag &＃039;--foo&＃039;
DEBUG:clap:Parser::check_for_help_and_version_str;
DEBUG:clap:Parser::check_for_help_and_version_str: Checking if --foo is help or version...Neither
DEBUG:clap:Parser::parse_flag;
DEBUG:clap:ArgMatcher::inc_occurrence_of: arg&＃061;foo
DEBUG:clap:ArgMatcher::inc_occurrence_of: first instance
DEBUG:clap:Parser::groups_for_arg: name&＃061;foo
DEBUG:clap:Parser::groups_for_arg: No groups defined
DEBUG:clap:Parser:get_matches_with: After parse_long_arg Flag
DEBUG:clap:ArgMatcher::process_arg_overrides:Some("foo");
DEBUG:clap:Parser::remove_overrides:[];
DEBUG:clap:Validator::validate;
DEBUG:clap:Parser::add_defaults;
DEBUG:clap:Validator::validate_blacklist;
DEBUG:clap:Validator::validate_blacklist:iter:foo;
DEBUG:clap:Parser::groups_for_arg: name&＃061;foo
DEBUG:clap:Parser::groups_for_arg: No groups defined
DEBUG:clap:Validator::validate_required: required&＃061;[];
DEBUG:clap:Validator::validate_matched_args;
DEBUG:clap:Validator::validate_matched_args:iter:foo: vals&＃061;[]
DEBUG:clap:Validator::validate_arg_requires:foo;
DEBUG:clap:Validator::missing_required_error: extra&＃061;Some("mising-arg")
DEBUG:clap:Parser::color;
DEBUG:clap:Parser::color: Color setting...Auto
DEBUG:clap:is_a_tty: stderr&＃061;true
DEBUG:clap:Validator::missing_required_error: reqs&＃061;[
"mising-arg",
]
DEBUG:clap:usage::get_required_usage_from: reqs&＃061;["mising-arg"], extra&＃061;Some("mising-arg")
DEBUG:clap:usage::get_required_usage_from: after init desc_reqs&＃061;["mising-arg"]
DEBUG:clap:usage::get_required_usage_from: no more children
DEBUG:clap:usage::get_required_usage_from: final desc_reqs&＃061;["mising-arg"]
DEBUG:clap:usage::get_required_usage_from: args_in_groups&＃061;[]
DEBUG:clap:usage::get_required_usage_from:iter:mising-arg:
thread &＃039;main&＃039; panicked at &＃039;Fatal internal error. Please consider filing a bug report at https://github.com/clap-rs/clap/issues&＃039;, src/libcore/option.rs:1185:5
note: run with &＃096;RUST_BACKTRACE&＃061;1&＃096; environment variable to display a backtrace. |
Debug Output (v3.0.0-beta.1)
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| DEBUG:clap:App::_do_parse;
DEBUG:clap:App::_build;
DEBUG:clap:App::_derive_display_order:clap-issue-1644
DEBUG:clap:App::_create_help_and_version;
DEBUG:clap:App::_create_help_and_version: Building --help
DEBUG:clap:App::_create_help_and_version: Building --version
DEBUG:clap:App::_arg_debug_asserts:foo
DEBUG:clap:App::_arg_debug_asserts:help
DEBUG:clap:App::_arg_debug_asserts:version
DEBUG:clap:App::_app_debug_asserts;
DEBUG:clap:Parser::get_matches_with;
DEBUG:clap:Parser::_build;
DEBUG:clap:Parser::_verify_positionals;
DEBUG:clap:Parser::get_matches_with: Begin parsing &＃039;"--foo"&＃039; ([45, 45, 102, 111, 111])
DEBUG:clap:Parser::is_new_arg:"--foo":NotFound
DEBUG:clap:Parser::is_new_arg: arg_allows_tac&＃061;false
DEBUG:clap:Parser::is_new_arg: -- found
DEBUG:clap:Parser::is_new_arg: starts_new_arg&＃061;true
DEBUG:clap:Parser::possible_subcommand: arg&＃061;"--foo"
DEBUG:clap:Parser::get_matches_with: possible_sc&＃061;false, sc&＃061;None
DEBUG:clap:Parser::parse_long_arg;
DEBUG:clap:Parser::parse_long_arg: Does it contain &＃039;&＃061;&＃039;...No
DEBUG:clap:Parser::parse_long_arg: Found valid opt or flag &＃039;--foo&＃039;
DEBUG:clap:Parser::check_for_help_and_version_str;
DEBUG:clap:Parser::check_for_help_and_version_str: Checking if --foo is help or version...Neither
DEBUG:clap:Parser::parse_flag;
DEBUG:clap:ArgMatcher::inc_occurrence_of: arg&＃061;4741034841092048056
DEBUG:clap:ArgMatcher::inc_occurrence_of: first instance
DEBUG:clap:Parser::groups_for_arg: name&＃061;4741034841092048056
DEBUG:clap:Parser:get_matches_with: After parse_long_arg Flag
DEBUG:clap:Parser::remove_overrides;
DEBUG:clap:Parser::remove_overrides:iter:4741034841092048056;
DEBUG:clap:Validator::validate;
DEBUG:clap:Parser::add_defaults;
DEBUG:clap:Validator::validate_conflicts;
DEBUG:clap:Validator::validate_conflicts_with_everything;
DEBUG:clap:Validator::validate_conflicts_with_everything:iter:4741034841092048056;
DEBUG:clap:Validator::gather_conflicts;
DEBUG:clap:Validator::gather_conflicts:iter:4741034841092048056;
DEBUG:clap:Parser::groups_for_arg: name&＃061;4741034841092048056
DEBUG:clap:Validator::validate_required: required&＃061;ChildGraph([]);
DEBUG:clap:Validator::gather_requirements;
DEBUG:clap:Validator::gather_requirements:iter:4741034841092048056;
DEBUG:clap:Validator::validate_required:iter:aog&＃061;18152889946298061510;
DEBUG:clap:Validator::validate_required_unless;
DEBUG:clap:Validator::validate_matched_args;
DEBUG:clap:Validator::validate_matched_args:iter:4741034841092048056: vals&＃061;[]
DEBUG:clap:Validator::validate_arg_num_vals;
DEBUG:clap:Validator::validate_arg_values: arg&＃061;"foo"
DEBUG:clap:Validator::validate_arg_requires:foo;
DEBUG:clap:Validator::missing_required_error; incl&＃061;Some(18152889946298061510)
DEBUG:clap:App::color;
DEBUG:clap:App::color: Color setting...Auto
DEBUG:clap:is_a_tty: stderr&＃061;true
DEBUG:clap:Validator::missing_required_error: reqs&＃061;ChildGraph([Child { id: 18152889946298061510, children: None }])
DEBUG:clap:Usage::get_required_usage_from: incls&＃061;[18152889946298061510], matcher&＃061;true, incl_last&＃061;true
DEBUG:clap:Usage::get_required_usage_from:iter:18152889946298061510:
thread &＃039;main&＃039; panicked at &＃039;Fatal internal error. Please consider filing a bug report at https://github.com/kbknapp/clap-rs/issues&＃039;, src/libcore/option.rs:1185:5
note: run with &＃096;RUST_BACKTRACE&＃061;1&＃096; environment variable to display a backtrace. |
该提问来源于开源项目：clap-rs/clap
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