slangc -dump-module failing for some slang-modules

[cheneym2]

#6638 introduced a "-dump-module" feature to slangc which takes a slang-module filename as input and shows the Slang IR disassembly.

The feature shows an error for some slang-modules.

Taking for example, just the slang-modules that are left over on disk after running slang-test,

These ones work ✔ :

./tests/modules/environment.slang-module
./tests/diagnostics/illegal-func-decl-module.slang-module
./tests/serialization/obfuscated-loc-module.slang-module
./tests/ir/dump-module.slang-module
./tests/library/export-library-generics-test.slang-module
./tests/library/module-library-pointer-param.slang-module
./tests/library/precompiled-module-library-resource-spv.slang-module
./tests/library/export-library-generics.slang-module

But these ones don't ❌ :

./tests/serialization/obfuscated-serialized-module.slang-module
./tests/serialization/serialized-module.slang-module

Those two fail with an error like this:

11:06 $ ./build/Release/bin/slangc -dump-module tests/serialization/obfuscated-serialized-module.slang-module 
path(1): error 1: cannot open file 'obfuscated_serialized_module_shared.slang'.
RIFF