Internal compiler error with lib is built by different rust version. #5833
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Closing this since I have no idea how to reproduce it and the backtrace doesn't seem especially helpful. @sammykim, feel free to reopen if you're still hitting this. |
flip1995
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flip1995
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…=yaahc Fix FP `useless_conversion` Fix rust-lang#5833. changelog: none
calebcartwright
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Fixes 5730
Previously rustfmt was attempting to slice a string with an invalid
range (`start > end`), leading to the ICE.
When formatting a macro transcriber snippet consisting of a lone
semicolon, the snippet was being formatted into the empty string,
leading the enclosing `fn main() {\n}` added by `format_code_block` to
be formatted into `fn main() {}`. However, rustfmt was assuming that the
enclosing function string's length had been left unchanged. This was
leading to an invalid range being constructed when attempting to trim
off the enclosing function.
The fix is to just clamp the range's start to be less than or equal
to the range's end, since if `end < start` there's nothing to iterate
over anyway.
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Error message is
/home/sammy.kim/bin/../lib/librustrt.so(_Z18task_start_wrapperP10spawn_args+0x24)[0x7f9fccedeea4]
error: internal compiler error: unexpected failure
note: the compiler hit an unexpected failure path. this is a bug
note: try running with RUST_LOG=rustc=1,::rt::backtrace to get further details and report the results to github.com/mozilla/rust/issues
rust: task failed at 'explicit failure', /home/yichoi/rust_stable4/src/librustc/rustc.rc:359
/home/sammy.kim/bin/../lib/librustrt.so(_ZN9rust_task13begin_failureEPKcS1_m+0x4b)[0x7f9fccede65b]
/home/sammy.kim/bin/../lib/librustrt.so(+0x2a249)[0x7f9fcceef249]
/home/sammy.kim/bin/../lib/librustrt.so(upcall_fail+0x198)[0x7f9fccee0458]
/home/sammy.kim/bin/../lib/libcore-c3ca5d77d81b46c1-0.6.so(+0x10232b)[0x7f9fce95332b]
/home/sammy.kim/bin/../lib/libcore-c3ca5d77d81b46c1-0.6.so(+0x1022d2)[0x7f9fce9532d2]
/home/sammy.kim/bin/../lib/libcore-c3ca5d77d81b46c1-0.6.so(_ZN3sys12begin_unwind17_7cd364c41f10422f3_06E+0x71)[0x7f9fce89e2e1]
/home/sammy.kim/bin/../lib/libcore-c3ca5d77d81b46c1-0.6.so(+0x14c264)[0x7f9fce99d264]
/home/sammy.kim/bin/../lib/librustc-c84825241471686d-0.6.so(_ZN7monitor17_bd76f93fc7c7a02f3_06E+0x2cf5)[0x7f9fcd94be45]
/home/sammy.kim/bin/../lib/librustc-c84825241471686d-0.6.so(+0x837004)[0x7f9fcd958004]
/home/sammy.kim/bin/../lib/librustc-c84825241471686d-0.6.so(_ZN4main16_706f4ee7413ae583_06E+0x7e)[0x7f9fcd957c1e]
/home/sammy.kim/bin/../lib/librustrt.so(_Z18task_start_wrapperP10spawn_args+0x24)[0x7f9fccedeea4]
rust: domain main @0x1d00c20 root task failed
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