deno: thread 'main' panicked at 'already borrowed: BorrowMutError'

Received this error. For some additional info, I am only using the std/path module and some function from the Deno global.

thread 'main' panicked at 'already borrowed: BorrowMutError', /rustc/4fb7144ed159f94491249e86d5bbd033b5d60550/src/libcore/cell.rs:878:9
stack backtrace:
   0: backtrace::backtrace::libunwind::trace
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.44/src/backtrace/libunwind.rs:86
   1: backtrace::backtrace::trace_unsynchronized
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.44/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print_fmt
             at src/libstd/sys_common/backtrace.rs:78
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
             at src/libstd/sys_common/backtrace.rs:59
   4: core::fmt::write
             at src/libcore/fmt/mod.rs:1063
   5: std::io::Write::write_fmt
             at src/libstd/io/mod.rs:1426
   6: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:62
   7: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:49
   8: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:204
   9: std::panicking::default_hook
             at src/libstd/panicking.rs:224
  10: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:470
  11: rust_begin_unwind
             at src/libstd/panicking.rs:378
  12: core::panicking::panic_fmt
             at src/libcore/panicking.rs:85
  13: core::option::expect_none_failed
             at src/libcore/option.rs:1211
  14: deno_core::bindings::send
  15: <extern "C" fn(A0) .> R as rusty_v8::support::CFnFrom<F>>::mapping::c_fn
  16: _ZN2v88internal25FunctionCallbackArguments4CallENS0_15CallHandlerInfoE
  17: _ZN2v88internal12_GLOBAL__N_119HandleApiCallHelperILb0EEENS0_11MaybeHandleINS0_6ObjectEEEPNS0_7IsolateENS0_6HandleINS0_10HeapObjectEEESA_NS8_INS0_20FunctionTemplateInfoEEENS8_IS4_EENS0_16BuiltinArgumentsE
  18: _ZN2v88internalL26Builtin_Impl_HandleApiCallENS0_16BuiltinArgumentsEPNS0_7IsolateE
  19: Builtins_CEntry_Return1_DontSaveFPRegs_ArgvOnStack_BuiltinExit
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
fatal runtime error: failed to initiate panic, error 5
Aborted

About this issue

Original URL
State: closed
Created 4 years ago
Comments: 18 (13 by maintainers)

Commits related to this issue

Run deno cache before starting func Not sure why but if there's a compilation during run, especially using --reload, causes the problem here: https://github.com/denoland/deno/issues/6054#issuecomment... — committed to anthonychu/azure-functions-deno-template by anthonychu 4 years ago

Most upvoted comments

v1.0.5 will be released later today with a fix for this

ry on Jun 3, 2020

@ry

// a.js
await import(new URL("./b.js", import.meta.url).toString());
const conn = Deno.connect({hostname: "localhost", port: 8080});

// b.js
// (empty)

SyrupThinker on Jun 3, 2020