INFO cargo_tarpaulin::statemachine::instrumented: Merging coverage reports
ERROR cargo_tarpaulin: Parsing failed

# IR level Instrumentation Flag
:ir
# Always instrument the function entry block
:entry_first
foo
# Func Hash:
1111
# Num Counters:
5
# Counter Values:
10000
50
2000
40
6000

bar.cc:bar
# Func Hash:
2222
# Num Counters:
10
# Counter Values:
0
0
0
0
0
0
0
0
0
0

error[E0277]: the trait bound `u64: ToUsize` is not satisfied
   --> /wrkdirs/usr/ports/devel/tarpaulin/work/tarpaulin-0.23.1/cargo-crates/llvm_profparser-0.3.0/src/instrumentation_profile/raw_profile.rs:308:35
    |
308 |             let (bytes, _) = take(header.padding_bytes_before_counters)(input)?;
    |                              ---- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `ToUsize` is not implemented for `u64`
    |                              |
    |                              required by a bound introduced by this call
    |
    = help: the following other types implement trait `ToUsize`:
              u16
              u32
              u8
              usize
note: required by a bound in `nom::bytes::complete::take`
   --> /wrkdirs/usr/ports/devel/tarpaulin/work/tarpaulin-0.23.1/cargo-crates/nom-7.1.1/src/bytes/complete.rs:408:6
    |
408 |   C: ToUsize,
    |      ^^^^^^^ required by this bound in `nom::bytes::complete::take`

For more information about this error, try `rustc --explain E0277`.
error: could not compile `llvm_profparser` due to previous error

thread 'main' panicked at 'index out of bounds: the len is 3 but the index is 7', src/coverage/coverage_mapping.rs:514:13
stack backtrace:
   0: rust_begin_unwind
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/panicking.rs:584:5
   1: core::panicking::panic_fmt
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/panicking.rs:142:14
   2: core::panicking::panic_bounds_check
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/panicking.rs:84:5
   3: llvm_profparser::coverage::coverage_mapping::parse_counter
             at ./src/coverage/coverage_mapping.rs:514:13
   4: llvm_profparser::coverage::coverage_mapping::parse_mapping_regions
             at ./src/coverage/coverage_mapping.rs:386:31
   5: llvm_profparser::coverage::coverage_mapping::parse_coverage_functions
             at ./src/coverage/coverage_mapping.rs:332:17
   6: llvm_profparser::coverage::coverage_mapping::read_object_file::{{closure}}
             at ./src/coverage/coverage_mapping.rs:70:18
   7: core::option::Option<T>::map
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/option.rs:929:29
   8: llvm_profparser::coverage::coverage_mapping::read_object_file
             at ./src/coverage/coverage_mapping.rs:67:19
   9: llvm_profparser::coverage::coverage_mapping::CoverageMapping::new
             at ./src/coverage/coverage_mapping.rs:107:31
  10: cov::ShowCommand::run
             at ./src/bin/cov.rs:46:23
  11: cov::main
             at ./src/bin/cov.rs:75:35
  12: core::ops::function::FnOnce::call_once
             at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/ops/function.rs:248:5

cd /tmp
git clone https://github.com/xd009642/llvm-profparser.git
cd llvm-profparser

cat <<EOF > foo.cc
#define BAR(x) ((x) || (x))
template <typename T> void foo(T x) {
  for (unsigned I = 0; I < 10; ++I) { BAR(I); }
}
int main() {
  foo<int>(0);
  foo<float>(0);
  return 0;
}
EOF

clang++ -fprofile-instr-generate -fcoverage-mapping foo.cc -o foo
LLVM_PROFILE_FILE="foo.profraw" ./foo
llvm-profdata merge -sparse foo.profraw -o foo.profdata

# Works
llvm-cov show ./foo -instr-profile=foo.profdata

# Works not
RUST_BACKTRACE=1 cargo run --bin cov -- show --instr-profile foo.profdata --object ./foo