Reformat failed: ambiguous edition for `main.rs`

[engineeror]

Format on save or with the ctrl+shift+I combo doesn't work.

$ rustup component list | grep '('
cargo-x86_64-unknown-linux-gnu (default)
clippy-x86_64-unknown-linux-gnu (installed)
rls-x86_64-unknown-linux-gnu (installed)
rust-analysis-x86_64-unknown-linux-gnu (installed)
rust-docs-x86_64-unknown-linux-gnu (default)
rust-src (installed)
rust-std-x86_64-unknown-linux-gnu (default)
rust-std-x86_64-unknown-linux-musl (installed)
rustc-x86_64-unknown-linux-gnu (default)
rustfmt-x86_64-unknown-linux-gnu (installed)

$ code --list-extensions --show-versions
bungcip.better-toml@0.3.2
dustinsanders.an-old-hope-theme-vscode@3.2.1
ms-python.python@2019.2.5433
ms-vscode.cpptools@0.21.0
ms-vscode.Go@0.9.2
mshr-h.veriloghdl@1.0.1
PKief.material-icon-theme@3.6.3
rust-lang.rust@0.5.3
shakram02.bash-beautify@0.1.1
thenikso.github-plus-theme@1.2.0
trixnz.vscode-lua@0.12.4

VSCode: 1.31.1
rustup 1.16.0
rustc 1.33.0 (2aa4c46cf 2019-02-28)
cargo 1.33.0 (f099fe94b 2019-02-12)
rls-preview 1.33.0 (9f3c906 2019-01-20)
Arch Linux

The only Rust vscode option I've set is "rust-client.logToFile": true

my Cargo.toml, created with cargo init --bin:

[package]
name = "learn"
version = "0.1.0"
authors = ["user"]
edition = "2018"

[dependencies]

main.rs:

fn main() {
                     println!("hi");
}

log:

DEBUG 2019-03-03T17:55:21Z: rls::server: Language Server starting up. Version: rls 1.33.0 (9f3c906 2019-01-20)
DEBUG 2019-03-03T17:55:21Z: rls::build::rustc: rustc: analysis read successfully?: true
DEBUG 2019-03-03T17:55:21Z: rls::build::rustc: rustc: analysis read successfully?: true
 INFO 2019-03-03T17:55:21Z: rls::build: build finished in 486.9ms
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 507595692 }), name: "libunwind-7c91ffdc8da860d3.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/libunwind-7c91ffdc8da860d3.json" 0.001442919s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 510929054 }), name: "liballoc-4ebf5caee903d98f.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/liballoc-4ebf5caee903d98f.json" 0.046101750s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 510929054 }), name: "libbacktrace_sys-f8521075e248b627.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/libbacktrace_sys-f8521075e248b627.json" 0.000583211s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 510929054 }), name: "libpanic_unwind-4d55a38564aae54a.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/libpanic_unwind-4d55a38564aae54a.json" 0.001383706s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 514262416 }), name: "libcompiler_builtins-851bb3b5f6c4db49.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/libcompiler_builtins-851bb3b5f6c4db49.json" 0.009900781s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 514262416 }), name: "libpanic_abort-9bf16624dd05c0fb.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/libpanic_abort-9bf16624dd05c0fb.json" 0.000509036s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 524262500 }), name: "libcore-6a9d233d01acc350.json" }
DEBUG 2019-03-03T17:55:21Z: rls::build::rustc: rustc: analysis read successfully?: true
DEBUG 2019-03-03T17:55:21Z: rls::build::rustc: rustc: analysis read successfully?: true
 INFO 2019-03-03T17:55:21Z: rls::build: build finished in 217.6ms
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/libcore-6a9d233d01acc350.json" 0.194230809s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 524262500 }), name: "librustc_demangle-0ad27b9879d551d3.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/librustc_demangle-0ad27b9879d551d3.json" 0.000638978s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 524262500 }), name: "librustc_msan-b34c4fe91bed62b2.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/librustc_msan-b34c4fe91bed62b2.json" 0.000236953s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 524262500 }), name: "librustc_std_workspace_core-8895b32baedb08c6.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/librustc_std_workspace_core-8895b32baedb08c6.json" 0.000201577s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 524262500 }), name: "librustc_tsan-1545d3a3f89d84a2.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/librustc_tsan-1545d3a3f89d84a2.json" 0.000211219s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 530929224 }), name: "liblibc-588f18eae3ea58be.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 530929224 }), name: "librustc_lsan-22683a96578cae53.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/librustc_lsan-22683a96578cae53.json" 0.000223262s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 537595947 }), name: "libstd-e39317eb74365d3c.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/libstd-e39317eb74365d3c.json" 0.104453999s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 540929308 }), name: "libprofiler_builtins-c44e053db38bd48f.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/libprofiler_builtins-c44e053db38bd48f.json" 0.000391099s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 540929308 }), name: "librustc_asan-2dddc96329065fec.json" }
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading "/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis/librustc_asan-2dddc96329065fec.json" 0.000220789s
 INFO 2019-03-03T17:55:21Z: rls_analysis::raw: reading 15 crates from /home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis in 0.361590344s
 INFO 2019-03-03T17:55:21Z: rls_analysis::lowering: Lowering unwind ((1328488228804362593, 9042026925657904388)) in 0.00s
 INFO 2019-03-03T17:55:21Z: rls_analysis::lowering:     defs:  43
 INFO 2019-03-03T17:55:21Z: rls_analysis::lowering:     refs:  0
 INFO 2019-03-03T17:55:21Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering alloc ((5226771781757675641, 11183407964508506038)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  518
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  30
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 4
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering backtrace_sys ((3005442698276396085, 7194037300925619286)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  8
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering panic_unwind ((11662190156692096384, 12505544175813687064)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  41
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  1
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering compiler_builtins ((17633954781163668134, 3962627684191718065)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  196
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  18
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering panic_abort ((787053902398311126, 15378570164689252539)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  5
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering core ((772178867720458397, 10513760593670507587)) in 0.02s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  3015
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  198
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 4
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering rustc_demangle ((5066653915378193616, 7813142097187859454)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  6
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering rustc_msan ((13528230818313715318, 4757977703829466767)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  1
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering rustc_std_workspace_core ((7858001605524721373, 8369385247697161108)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  1
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering rustc_tsan ((5596830482062206331, 1836845094255217221)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  1
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering rustc_lsan ((5834729939995958917, 3875123599813354278)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  1
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering std ((853209657226342047, 8462664850197014382)) in 0.02s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  2032
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  356
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 16
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering profiler_builtins ((7472201890199654409, 14789945983205190770)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  1
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering rustc_asan ((12318964176942276536, 1709571861400091970)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  1
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Total lowering time: 0.05s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Diff in rss: 0.00KB
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering learn2 ((3574539331163146583, 2046871859423766222)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  21
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  27
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering learn2 ((14762300841029797651, 7858938758450020598)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  10
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Total lowering time: 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Diff in rss: 0.00KB
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 507595692 }), name: "libunwind-7c91ffdc8da860d3.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 510929054 }), name: "liballoc-4ebf5caee903d98f.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 510929054 }), name: "libbacktrace_sys-f8521075e248b627.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 510929054 }), name: "libpanic_unwind-4d55a38564aae54a.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 514262416 }), name: "libcompiler_builtins-851bb3b5f6c4db49.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 514262416 }), name: "libpanic_abort-9bf16624dd05c0fb.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 524262500 }), name: "libcore-6a9d233d01acc350.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 524262500 }), name: "librustc_demangle-0ad27b9879d551d3.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 524262500 }), name: "librustc_msan-b34c4fe91bed62b2.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 524262500 }), name: "librustc_std_workspace_core-8895b32baedb08c6.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 524262500 }), name: "librustc_tsan-1545d3a3f89d84a2.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 530929224 }), name: "liblibc-588f18eae3ea58be.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 530929224 }), name: "librustc_lsan-22683a96578cae53.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 537595947 }), name: "libstd-e39317eb74365d3c.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 540929308 }), name: "libprofiler_builtins-c44e053db38bd48f.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: Considering Listing { kind: File(SystemTime { tv_sec: 1551564546, tv_nsec: 540929308 }), name: "librustc_asan-2dddc96329065fec.json" }
 INFO 2019-03-03T17:55:22Z: rls_analysis::raw: reading 0 crates from /home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/analysis in 0.000241904s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Total lowering time: 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Diff in rss: 0.00KB
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering learn2 ((14762300841029797651, 7858938758450020598)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  21
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  27
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Lowering learn2 ((3574539331163146583, 2046871859423766222)) in 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     defs:  0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     refs:  27
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering:     globs: 0
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Total lowering time: 0.00s
 INFO 2019-03-03T17:55:22Z: rls_analysis::lowering: Diff in rss: 0.00KB
DEBUG 2019-03-03T17:55:23Z: rls::actions::hover: tooltip: racer_fallback_enabled: true
DEBUG 2019-03-03T17:55:23Z: rls::actions::hover: tooltip: span_def is empty, attempting with racer
DEBUG 2019-03-03T17:55:23Z: rls::actions::hover: racer_def: name: Some("assigns")
 INFO 2019-03-03T17:55:23Z: rls::actions: loading cargo project model
DEBUG 2019-03-03T17:55:23Z: rls::actions::hover: tooltip: racer returned an empty result
DEBUG 2019-03-03T17:55:23Z: rls::actions::hover: tooltip: def is empty
DEBUG 2019-03-03T17:55:23Z: rls::actions::hover: tooltip: contents.len: 0
 WARN 2019-03-03T17:55:23Z: rls::actions::requests: Reformat failed: ambiguous edition for `/home/user/Projects/RustLearning/learn/src/main.rs`

I can't begin to understand what the ambiguity is 😢

[Xanewok]

There shouldn't be one, it seems to be an RLS bug.

[Xanewok]

@engineeror do you still experience this issue?