fix u32 steps_between for 16-bit systems

[llogiq]

This fixes #48006.

[rust-highfive]

r? @dtolnay

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[rust-highfive]

The job x86_64-gnu-llvm-5.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

[00:47:30] ....................................................................................................
[00:47:34] ....................................................................................................
[00:47:36] ..........i.........................................................................................
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---
[00:53:58] ---- [run-pass] run-pass/issue-48006.rs stdout ----
[00:53:58] 
[00:53:58] error: compilation failed!
[00:53:58] status: exit code: 1
[00:53:58] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass/issue-48006.rs" "--target=x86_64-unknown-linux-gnu" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass/issue-48006/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass/issue-48006/auxiliary"
[00:53:58] ------------------------------------------
[00:53:58] 
[00:53:58] ------------------------------------------
[00:53:58] stderr:
[00:53:58] stderr:
[00:53:58] ------------------------------------------
[00:53:58] error[E0432]: unresolved import `std::ops::Step`
[00:53:58]   --> /checkout/src/test/run-pass/issue-48006.rs:13:5
[00:53:58]    |
[00:53:58] 13 | use std::ops::Step;
[00:53:58]    |     ^^^^^^^^^^^^^^ no `Step` in `ops`
[00:53:58] error: aborting due to previous error
[00:53:58] 
[00:53:58] For more information about this error, try `rustc --explain E0432`.
[00:53:58] 
---
[00:53:58] 
[00:53:58] thread 'main' panicked at 'Some tests failed', tools/compiletest/src/main.rs:497:22
[00:53:58] 
[00:53:58] 
[00:53:58] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/run-pass" "--build-base" "/checkout/obj/build/x86_65cod2e
129804 ./obj/build/x86_64-unknown-linux-gnu/stage0-bootstrap-tools/x86_64-unknown-linux-gnu/release
129128 ./obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu
129124 ./obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release
126284 ./obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[nagisa]

@bors r+

[bors]

📌 Commit 99eccbe7f0e23d4564b204ddfd5962c9ae8f35e7 has been approved by nagisa

[nagisa]

@bors r-

Seems like tests have failed.

r=me once fixed.

[llogiq]

Oops, it's std::iter::Step, not std::ops::Step. Let's see if this works...

[rust-highfive]

The job x86_64-gnu-llvm-5.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

[00:48:57] ....................................................................................................
[00:49:01] ....................................................................................................
[00:49:03] ..........i.........................................................................................
[00:49:06] ....................................................................................................
[00:49:09] ...........................................................iiiiiiiii................................
[00:49:14] ....................................................................................................
[00:49:18] ....................................................................................................
[00:49:21] .......................................i............................................................
[00:49:23] .........................................................................................i.i..ii....

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[llogiq]

@nagisa this should now work, and hopefully we have at least one 16bit system to test this...

[nagisa]

Sadly, there are no CI runners that have pointer_width = 16, no.

@bors r+

[bors]

📌 Commit 9dab56c has been approved by nagisa

[bors]

⌛ Testing commit 9dab56c with merge 571a624...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: nagisa
Pushing 571a624 to master...