Error while building TRPL second edition:

[palnabarun]

I am trying to build the second edition of the book. I have copied over the source files from trpl/second-edition/src in the TRPL source code repository on Github.

nabarun@pal:~/codesl/trpl-ebook (git:master) $ ls trpl
appendix-00.md                              ch08-01-vectors.md                                  ch15-01-box.md
appendix-01-keywords.md                     ch08-02-strings.md                                  ch15-02-deref.md
appendix-02-operators.md                    ch08-03-hash-maps.md                                ch15-03-drop.md
appendix-03-derivable-traits.md             ch09-00-error-handling.md                           ch15-04-rc.md
appendix-04-macros.md                       ch09-01-unrecoverable-errors-with-panic.md          ch15-05-interior-mutability.md
appendix-05-translation.md                  ch09-02-recoverable-errors-with-result.md           ch15-06-reference-cycles.md
appendix-06-newest-features.md              ch09-03-to-panic-or-not-to-panic.md                 ch16-00-concurrency.md
ch01-00-introduction.md                     ch10-00-generics.md                                 ch16-01-threads.md
ch01-01-installation.md                     ch10-01-syntax.md                                   ch16-02-message-passing.md
ch01-02-hello-world.md                      ch10-02-traits.md                                   ch16-03-shared-state.md
ch02-00-guessing-game-tutorial.md           ch10-03-lifetime-syntax.md                          ch16-04-extensible-concurrency-sync-and-send.md
ch03-00-common-programming-concepts.md      ch11-00-testing.md                                  ch17-00-oop.md
ch03-01-variables-and-mutability.md         ch11-01-writing-tests.md                            ch17-01-what-is-oo.md
ch03-02-data-types.md                       ch11-02-running-tests.md                            ch17-02-trait-objects.md
ch03-03-how-functions-work.md               ch11-03-test-organization.md                        ch17-03-oo-design-patterns.md
ch03-04-comments.md                         ch12-00-an-io-project.md                            ch18-00-patterns.md
ch03-05-control-flow.md                     ch12-01-accepting-command-line-arguments.md         ch18-01-all-the-places-for-patterns.md
ch04-00-understanding-ownership.md          ch12-02-reading-a-file.md                           ch18-02-refutability.md
ch04-01-what-is-ownership.md                ch12-03-improving-error-handling-and-modularity.md  ch18-03-pattern-syntax.md
ch04-02-references-and-borrowing.md         ch12-04-testing-the-librarys-functionality.md       ch19-00-advanced-features.md
ch04-03-slices.md                           ch12-05-working-with-environment-variables.md       ch19-01-unsafe-rust.md
ch05-00-structs.md                          ch12-06-writing-to-stderr-instead-of-stdout.md      ch19-02-advanced-lifetimes.md
ch05-01-defining-structs.md                 ch13-00-functional-features.md                      ch19-03-advanced-traits.md
ch05-02-example-structs.md                  ch13-01-closures.md                                 ch19-04-advanced-types.md
ch05-03-method-syntax.md                    ch13-02-iterators.md                                ch19-05-advanced-functions-and-closures.md
ch06-00-enums.md                            ch13-03-improving-our-io-project.md                 ch20-00-final-project-a-web-server.md
ch06-01-defining-an-enum.md                 ch13-04-performance.md                              ch20-01-single-threaded.md
ch06-02-match.md                            ch14-00-more-about-cargo.md                         ch20-02-slow-requests.md
ch06-03-if-let.md                           ch14-01-release-profiles.md                         ch20-03-designing-the-interface.md
ch07-00-modules.md                          ch14-02-publishing-to-crates-io.md                  ch20-04-storing-threads.md
ch07-01-mod-and-the-filesystem.md           ch14-03-cargo-workspaces.md                         ch20-05-sending-requests-via-channels.md
ch07-02-controlling-visibility-with-pub.md  ch14-04-installing-binaries.md                      ch20-06-graceful-shutdown-and-cleanup.md
ch07-03-importing-names-with-use.md         ch14-05-extending-cargo.md                          img
ch08-00-common-collections.md               ch15-00-smart-pointers.md                           SUMMARY.md

However, when I try to build the book, I encounter the following error:

nabarun@pal:~/codesl/trpl-ebook (git:crate-update) $ cargo run --release                                                                                                 
    Finished release [optimized] target(s) in 0.0 secs
     Running `target/release/compile-trpl`
Reading book.thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error { repr: Os { code: 2, message: "No such file or directory" } }', libcore/resul
t.rs:916:5
note: Run with `RUST_BACKTRACE=1` for a backtrace.

I also tried with:

nabarun@pal:~/codesl/trpl-ebook (git:crate-update) $ ./target/release/compile-trpl --source=/home/nabarun/codesl/trpl-ebook/trpl
Reading book.thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error { repr: Os { code: 2, message: "No such file or directory" } }', libcore/resul
t.rs:916:5
note: Run with `RUST_BACKTRACE=1` for a backtrace.

and I get the same error.

Did anybody else try to do the same?

[killercup]

Can you post the stack trace? (Run it like `env RUST_BACKTRACE=1 cargo run --release`)

…

Am 20.01.2018 um 18:39 schrieb Nabarun Pal ***@***.***>: I am trying to build the second edition of the book. I have copied over the source files from trpl/second-edition/src in the TRPL source code repository on Github. ***@***.***:~/codesl/trpl-ebook (git:master) $ ls trpl appendix-00.md ch08-01-vectors.md ch15-01-box.md appendix-01-keywords.md ch08-02-strings.md ch15-02-deref.md appendix-02-operators.md ch08-03-hash-maps.md ch15-03-drop.md appendix-03-derivable-traits.md ch09-00-error-handling.md ch15-04-rc.md appendix-04-macros.md ch09-01-unrecoverable-errors-with-panic.md ch15-05-interior-mutability.md appendix-05-translation.md ch09-02-recoverable-errors-with-result.md ch15-06-reference-cycles.md appendix-06-newest-features.md ch09-03-to-panic-or-not-to-panic.md ch16-00-concurrency.md ch01-00-introduction.md ch10-00-generics.md ch16-01-threads.md ch01-01-installation.md ch10-01-syntax.md ch16-02-message-passing.md ch01-02-hello-world.md ch10-02-traits.md ch16-03-shared-state.md ch02-00-guessing-game-tutorial.md ch10-03-lifetime-syntax.md ch16-04-extensible-concurrency-sync-and-send.md ch03-00-common-programming-concepts.md ch11-00-testing.md ch17-00-oop.md ch03-01-variables-and-mutability.md ch11-01-writing-tests.md ch17-01-what-is-oo.md ch03-02-data-types.md ch11-02-running-tests.md ch17-02-trait-objects.md ch03-03-how-functions-work.md ch11-03-test-organization.md ch17-03-oo-design-patterns.md ch03-04-comments.md ch12-00-an-io-project.md ch18-00-patterns.md ch03-05-control-flow.md ch12-01-accepting-command-line-arguments.md ch18-01-all-the-places-for-patterns.md ch04-00-understanding-ownership.md ch12-02-reading-a-file.md ch18-02-refutability.md ch04-01-what-is-ownership.md ch12-03-improving-error-handling-and-modularity.md ch18-03-pattern-syntax.md ch04-02-references-and-borrowing.md ch12-04-testing-the-librarys-functionality.md ch19-00-advanced-features.md ch04-03-slices.md ch12-05-working-with-environment-variables.md ch19-01-unsafe-rust.md ch05-00-structs.md ch12-06-writing-to-stderr-instead-of-stdout.md ch19-02-advanced-lifetimes.md ch05-01-defining-structs.md ch13-00-functional-features.md ch19-03-advanced-traits.md ch05-02-example-structs.md ch13-01-closures.md ch19-04-advanced-types.md ch05-03-method-syntax.md ch13-02-iterators.md ch19-05-advanced-functions-and-closures.md ch06-00-enums.md ch13-03-improving-our-io-project.md ch20-00-final-project-a-web-server.md ch06-01-defining-an-enum.md ch13-04-performance.md ch20-01-single-threaded.md ch06-02-match.md ch14-00-more-about-cargo.md ch20-02-slow-requests.md ch06-03-if-let.md ch14-01-release-profiles.md ch20-03-designing-the-interface.md ch07-00-modules.md ch14-02-publishing-to-crates-io.md ch20-04-storing-threads.md ch07-01-mod-and-the-filesystem.md ch14-03-cargo-workspaces.md ch20-05-sending-requests-via-channels.md ch07-02-controlling-visibility-with-pub.md ch14-04-installing-binaries.md ch20-06-graceful-shutdown-and-cleanup.md ch07-03-importing-names-with-use.md ch14-05-extending-cargo.md img ch08-00-common-collections.md ch15-00-smart-pointers.md SUMMARY.md However, when I try to build the book, I encounter the following error: ***@***.***:~/codesl/trpl-ebook (git:crate-update) $ cargo run --release Finished release [optimized] target(s) in 0.0 secs Running `target/release/compile-trpl` Reading book.thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error { repr: Os { code: 2, message: "No such file or directory" } }', libcore/resul t.rs:916:5 note: Run with `RUST_BACKTRACE=1` for a backtrace. I also tried with: ***@***.***:~/codesl/trpl-ebook (git:crate-update) $ ./target/release/compile-trpl --source=/home/nabarun/codesl/trpl-ebook/trpl Reading book.thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error { repr: Os { code: 2, message: "No such file or directory" } }', libcore/resul t.rs:916:5 note: Run with `RUST_BACKTRACE=1` for a backtrace. and I get the same error. Did anybody else try to do the same? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or mute the thread.

[palnabarun]

@killercup Here is the stacktrace

nabarun@pal:~/codesl/trpl-ebook (git:master) $ env RUST_BACKTRACE=1 cargo run --release
    Finished release [optimized] target(s) in 0.0 secs
     Running `target/release/compile-trpl`
Reading book.thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error { repr: Os { code: 2, message: "No such file or directory" } }', libcore/result.rs:916:5
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
   1: std::sys_common::backtrace::print
             at libstd/sys_common/backtrace.rs:68
             at libstd/sys_common/backtrace.rs:57
   2: std::panicking::default_hook::{{closure}}
             at libstd/panicking.rs:381
   3: std::panicking::default_hook
             at libstd/panicking.rs:397
   4: std::panicking::rust_panic_with_hook
             at libstd/panicking.rs:577
   5: std::panicking::begin_panic
             at libstd/panicking.rs:538
   6: std::panicking::begin_panic_fmt
             at libstd/panicking.rs:522
   7: rust_begin_unwind
             at libstd/panicking.rs:498
   8: core::panicking::panic_fmt
             at libcore/panicking.rs:71
   9: core::result::unwrap_failed
  10: compile_trpl::main
  11: std::rt::lang_start::{{closure}}
  12: std::panicking::try::do_call
             at libstd/rt.rs:59
             at libstd/panicking.rs:480
  13: __rust_maybe_catch_panic
             at libpanic_unwind/lib.rs:102
  14: std::rt::lang_start_internal
             at libstd/panicking.rs:459
             at libstd/panic.rs:365
             at libstd/rt.rs:58
  15: main
  16: __libc_start_main
  17: _start

[killercup]

Okay, damn, that's really unhelpful stack trace! The only thing of note here is 10: compile_trpl::main – the rest is just the panicking machinery. Sadly, this is also code I've written 2.5 years ago and has thus not really anything like the current state of the art error reporting (that you get e.g. with error-chain or the failure crate).

Since it says "No such file or directory", I'd just go looking for File stuff and add some logging. E.g., this helper here:

trpl-ebook/src/helpers/file.rs

Lines 6 to 11 in f612176

	pub fn get_file_content<P: AsRef<Path>>(path: P) -> Result<String, Box<Error>> {
	let mut file = try!(File::open(path));
	let mut buffer = String::new();
	try!(file.read_to_string(&mut buffer));
	Ok(buffer)
	}

Could be changed to report some more info, something like this.

[abcdev]

Fixed by #52

[palnabarun]

That is awesome.

Thank you. @abcdev