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abhaykadam opened this issue Jan 22, 2014 · 1 comment · Fixed by #11737
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error: Unrecognized option: 'Help' #11729

abhaykadam opened this issue Jan 22, 2014 · 1 comment · Fixed by #11737

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@abhaykadam
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getting unexpected failure on OS X 10.9.1 when some random option is passed to rustc.

my rustc session was:

$ rustc --Help
error: Unrecognized option: 'Help'.
error: internal compiler error: unexpected failure
This message reflects a bug in the Rust compiler. 
We would appreciate a bug report: http://static.rust-lang.org/doc/master/complement-bugreport.html
note: the compiler hit an unexpected failure path. this is a bug
task 'rustc' failed at 'explicit failure', /Users/abhay/devel/rust/rust/src/librustc/driver/driver.rs:1137

and rustc -v returns:

$ rustc -v
rustc 0.10-pre (750d48b 2014-01-22 00:51:20 -0800)
host: x86_64-apple-darwin
@pnkfelix
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At the very least, the "Unrecognized option" error message should include some mention of the --help option to get a usage help message.

@alexcrichton alexcrichton mentioned this issue Jan 22, 2014
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bors added a commit that referenced this issue Jan 23, 2014
@bors
auto merge of #11737 : alexcrichton/rust/issue-11729, r=thestinger
7cabd40 
Closes #11729
arcnmx pushed a commit to arcnmx/rust that referenced this issue Jan 9, 2023
@bors
Auto merge of rust-lang#13800 - lowr:fix/mbe-expr-backwards-compat, r…
ccbf8fe 
…=Veykril

fix: don't let mbe expr fragments match let exprs and inline consts

Fixes rust-lang#11729

`expr` fragment in mbe should not match let expressions and inline consts for backwards compatibility. See rust-lang#86730 for details.

This patch is porting [this logic in rustc](https://github.com/rust-lang/rust/blob/f0c4da49983aa699f715caf681e3154b445fb60b/compiler/rustc_parse/src/parser/nonterminal.rs#L28-L34) (which is called [here in rustc's mbe engine](https://github.com/rust-lang/rust/blob/f0c4da49983aa699f715caf681e3154b445fb60b/compiler/rustc_expand/src/mbe/macro_parser.rs#L576)) to our mbe engine.
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Don't fatally fail in driver::early_error alexcrichton/rust
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@pnkfelix @abhaykadam