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rustc 1.13.0 hangs/out of memory #37942

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@ctsa

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@ctsa

I'm using the latest stable release (1.13.0) installed via rustup on Ubuntu 16.04. I ran into a compiler hang after a copy/paste slipup, and reduced the testcase down to the following:

main.rs:

fn main() {
    extern crate rand;
    use rand::Rng;
}

What I see when compiling is:

$ /usr/bin/time -v rustc main.rs 
fatal runtime error: out of memory
Command exited with non-zero status 1
        Command being timed: "rustc main.rs"
        User time (seconds): 47.28
        System time (seconds): 0.98
        Percent of CPU this job got: 99%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 0:48.56
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 4259424
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 0
        Minor (reclaiming a frame) page faults: 88942
        Voluntary context switches: 9
        Involuntary context switches: 3471
        Swaps: 0
        File system inputs: 0
        File system outputs: 0
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 1

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