I built c2rust from the master per the suggestion in #1329.

Did I do something wrong or is this a problem in c2rust?

Here is what I did:

1. I cloned the fsearch repo: https://github.com/cboxdoerfer/fsearch
2. I created the compile_commands.json using the following commands:
   meson setup builddir
ninja -C builddir
3. Then from the root of the project I did: RUST_BACKTRACE=1 c2rust transpile builddir/compile_commands.json
4. This is the result:

warning: Skipping duplicate compilation cmd for /opt/Projects/fsearch/builddir/src/ui_resources.c
warning: Skipping duplicate compilation cmd for /opt/Projects/fsearch/builddir/src/icon_resources.c
warning: Skipping duplicate compilation cmd for /opt/Projects/fsearch/builddir/src/ui_resources.c
warning: Skipping duplicate compilation cmd for /opt/Projects/fsearch/builddir/src/icon_resources.c
warning: Skipping duplicate compilation cmd for /opt/Projects/fsearch/builddir/src/ui_resources.c
warning: Skipping duplicate compilation cmd for /opt/Projects/fsearch/builddir/src/icon_resources.c
warning: Skipping duplicate compilation cmd for /opt/Projects/fsearch/builddir/src/ui_resources.c
warning: Skipping duplicate compilation cmd for /opt/Projects/fsearch/builddir/src/icon_resources.c
warning: Skipping duplicate compilation cmd for /opt/Projects/fsearch/builddir/src/ui_resources.c
warning: Skipping duplicate compilation cmd for /opt/Projects/fsearch/builddir/src/icon_resources.c
warning: Skipping duplicate compilation cmd for /opt/Projects/fsearch/builddir/src/ui_resources.c
warning: Skipping duplicate compilation cmd for /opt/Projects/fsearch/builddir/src/icon_resources.c
Transpiling ui_resources.c
Transpiling icon_resources.c
Transpiling fsearch.c
thread 'main' panicked at 'no entry found for key', c2rust-transpile/src/c_ast/iterators.rs:341:69
stack backtrace:
0: rust_begin_unwind
at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/std/src/panicking.rs:584:5
1: core::panicking::panic_fmt
at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/core/src/panicking.rs:142:14
2: core::panicking::panic_display
at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/core/src/panicking.rs:72:5
3: core::panicking::panic_str
at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/core/src/panicking.rs:56:5
4: core::option::expect_failed
at /rustc/d394408fb38c4de61f765a3ed5189d2731a1da91/library/core/src/option.rs:1874:5
5: c2rust_transpile::c_ast::iterators::immediate_children_all_types
6: c2rust_transpile::c_ast::iterators::NodeVisitor::visit_tree
7: c2rust_transpile::translator::comments::::locate_comments
8: c2rust_transpile::translator::translate
9: c2rust_transpile::transpile_single
10: <core::iter::adapters::map::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
11: <alloc::vec::Vec as alloc::vec::spec_from_iter::SpecFromIter<T,I>>::from_iter
12: c2rust_transpile::transpile
13: c2rust_transpile::main
note: Some details are omitted, run with RUST_BACKTRACE=full for a verbose backtrace.