<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/121972>121972</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [flang] fatal internal error: CHECK(IsValidKindOfIntrinsicType(category_, kind_)) failed in flang/include/flang/Evaluate/type.h
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            flang
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          yype
      </td>
    </tr>
</table>

<pre>
    Hi there, flang crashes from an assertion failure on the following test case:

```fortran
module acc_declare_test
 integer(16), parameter :: ifCondition = .FALSE.
 real, dimension(n) :: data1
end module
```

Tested version(s): 19.1.0, trunk.

Example: https://godbolt.org/z/7jnEjP55s

Stack dump:

<details>
<summary>Click me</summary>

```

fatal internal error: CHECK(IsValidKindOfIntrinsicType(category_, kind_)) failed at /root/llvm-project/flang/include/flang/Evaluate/type.h(98)
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.      Program arguments: /opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang -fc1 -triple x86_64-unknown-linux-gnu -S -mrelocation-model pic -pic-level 2 -pic-is-pie -target-cpu x86-64 -mllvm -x86-asm-syntax=intel -resource-dir /opt/compiler-explorer/clang-llvmflang-trunk-20250107/lib/clang/20 -mframe-pointer=all -o /app/output.s -x f95-cpp-input /app/example.f90
 #0 0x00000000039ffa18 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x39ffa18)
 #1 0x00000000039fd5dc SignalHandler(int) Signals.cpp:0:0
 #2 0x00007e13ce042520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #3 0x00007e13ce0969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #4 0x00007e13ce042476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #5 0x00007e13ce0287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #6 0x00000000053ed959 (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x53ed959)
 #7 0x000000000500be33 Fortran::evaluate::DataConstantConversionExtension(Fortran::evaluate::FoldingContext&, Fortran::evaluate::DynamicType const&, Fortran::evaluate::Expr<Fortran::evaluate::SomeType> const&) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x500be33)
 #8 0x0000000004a1c973 Fortran::evaluate::NonPointerInitializationExpr(Fortran::semantics::Symbol const&, Fortran::evaluate::Expr<Fortran::evaluate::SomeType>&&, Fortran::evaluate::FoldingContext&, Fortran::semantics::Scope const*) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x4a1c973)
 #9 0x000000000447a096 std::optional<Fortran::evaluate::Expr<Fortran::evaluate::SomeType>> Fortran::semantics::BaseVisitor::EvaluateNonPointerInitializer<Fortran::parser::Constant<Fortran::common::Indirection<Fortran::parser::Expr, false>>>(Fortran::semantics::Symbol const&, Fortran::parser::Constant<Fortran::common::Indirection<Fortran::parser::Expr, false>> const&, Fortran::parser::CharBlock) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x447a096)
#10 0x000000000447a2bd Fortran::semantics::DeclarationVisitor::NonPointerInitialization(Fortran::parser::Name const&, Fortran::parser::Constant<Fortran::common::Indirection<Fortran::parser::Expr, false>> const&) (.part.0) resolve-names.cpp:0:0
#11 0x000000000448bd26 Fortran::semantics::DeclarationVisitor::Initialization(Fortran::parser::Name const&, Fortran::parser::Initialization const&, bool) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x448bd26)
#12 0x000000000448d723 Fortran::semantics::DeclarationVisitor::Post(Fortran::parser::EntityDecl const&) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x448d723)
#13 0x000000000449de68 void Fortran::parser::detail::ParseTreeVisitorLookupScope::Walk<Fortran::parser::DeclarationConstruct, Fortran::semantics::ResolveNamesVisitor>(std::__cxx11::list<Fortran::parser::DeclarationConstruct, std::allocator<Fortran::parser::DeclarationConstruct>> const&, Fortran::semantics::ResolveNamesVisitor&) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x449de68)
#14 0x000000000449ad9d Fortran::semantics::ResolveNamesVisitor::Pre(Fortran::parser::SpecificationPart const&) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x449ad9d)
#15 0x00000000044da207 Fortran::semantics::ResolveNamesVisitor::ResolveSpecificationParts(Fortran::semantics::ProgramTree&) (.part.0) resolve-names.cpp:0:0
#16 0x00000000044da9b1 Fortran::semantics::ResolveNamesVisitor::Pre(Fortran::parser::ProgramUnit const&) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x44da9b1)
#17 0x00000000044dbe0c Fortran::semantics::ResolveNames(Fortran::semantics::SemanticsContext&, Fortran::parser::Program const&, Fortran::semantics::Scope&) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x44dbe0c)
#18 0x0000000004541f4e Fortran::semantics::Semantics::Perform() (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x4541f4e)
#19 0x0000000003a537bd Fortran::frontend::FrontendAction::runSemanticChecks() (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x3a537bd)
#20 0x0000000003de1932 Fortran::frontend::CodeGenAction::beginSourceFileAction() (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x3de1932)
#21 0x0000000003a51f8d Fortran::frontend::FrontendAction::beginSourceFile(Fortran::frontend::CompilerInstance&, Fortran::frontend::FrontendInputFile const&) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x3a51f8d)
#22 0x0000000003a42c27 Fortran::frontend::CompilerInstance::executeAction(Fortran::frontend::FrontendAction&) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x3a42c27)
#23 0x0000000003a59c03 Fortran::frontend::executeCompilerInvocation(Fortran::frontend::CompilerInstance*) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x3a59c03)
#24 0x0000000001f7cd27 fc1_main(llvm::ArrayRef<char const*>, char const*) (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x1f7cd27)
#25 0x0000000001e5068e main (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x1e5068e)
#26 0x00007e13ce029d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#27 0x00007e13ce029e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#28 0x0000000001f7b795 _start (/opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin/flang+0x1f7b795)
flang-20: error: unable to execute command: Aborted (core dumped)
flang-20: error: flang frontend command failed due to signal (use -v to see invocation)
flang version 20.0.0git (https://github.com/llvm/llvm-project.git 97097958fdf525e8c14fcdde94231bae72ea2673)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/compiler-explorer/clang-llvmflang-trunk-20250107/bin
flang-20: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
flang-20: note: diagnostic msg: /tmp/example-c3742d
flang-20: note: diagnostic msg: /tmp/example-c3742d.sh
flang-20: note: diagnostic msg: 

********************
Compiler returned: 254
```
</details>

The test case was generated by a fuzzer.
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzEWt9u27jTfRrlhpAhUbIlXeTCdextsMU2aLK7lwZFjmw2FCmQVGr36T-QkiNbTZ2kXX-_IgUihTM8c-bw74gYwzcS4DqYfgimN1ektVulr_f7Bq5KxfbXHzmyW9AQ4AWqBJEbRDUxWzCo0qpGRCJiDGjLlUQV4aLVgJR0NqhSQqhvXG6QBWMRJQaCZB5E_mcWdT-V0lYTGUTzWrFWACKUrhlQQTSsnV0QzRGXFjagA5zHswAXDktDNKnBgkbOZzJHvFooybgHEiQ3aLKaf7pfTpy5BiKcDeM1SMOVDHAuA1wcTBmxJA6iOUiGOhTHCDvAD2AsMPQEundgHJBkjuJiEk8i597qVj5OuubLHakb4eJFW2sb43rCqwCvNoqVStiJ0psAr74HeJV9lcuvd9Op6SzvLaGPiLV1M5CVLBhYwoUJkmX3bNq6JnofJMuF4PQR1RAkiwCvhvcjnrvHilgiPJ1aEoFAa6UdxsXH5eLPAOe35h8iOPuTS_a5upVWc2k4fdg3EOCcEgsbpfdrF-wjl2ztc1H4vANDxKIAr7RSNsArIZ7qsNHqK1D36KUT4BWXVLQMjt4sn4hoiXWv7L6ByTbAeZE7z9H87tNyfr9Epi1rbhFBZbtBGhqlLbJqTCy327acUFX3vf8IghvTggnwChHJUA_FS9VrGpWEPlpNKExeyEM0CaLiTquNJjUietPWIK3r3gWtGuefqrrhAnQIu0Yo7QS7oi7M0AHxAYdeJCGO8DSKoyzAq5LLAxsorGiMQqt5IwDt8tl6loatfJTqmwwFl-0u3MgWhfcorDUIRYlTe1grBgI1nKKw4TQU8AQC4e6Bm7DhgEJL9AZsSJvW-Q1nKQprBwqF7pGYOjR7ackuSG6cOgQKNRjVagoh4_o3QxS8PDQL8ApHKKwrN3rDRnkpBskNEQKFyvVDmsb11tqmtRODwh2qimlImybksmnt0AS6ITapCiduFOAkQtEuOvxLiqoicY68FPw4N3vT_XKnubQ-vw8u2wHOh0aafFsrYzWQOsAzp3QurZ8rcP6fJTrAH6JdD7BTuoMfj-CzKaPonm8kER-JZMJPgD2a7rWZ0MbJM_L_Oy-495JBnFCIUjzFUQ--y0Ovq2c9dX-gE6MmMw_MmwywklOHxayoKGrsVgNh60cuxPu8e_vBezqGm2YztDE-vPfCTrPZ4Hh66hjnWZUgUrq5411uveHgdnacpGkCrJheQBu946Hb7KTbKCohSdCqXzu9cOEwj_qnG2LJQkljibQLJftla7mzzwvgGeOVEozLzUJJCzvbD4Nzne0lqbtlAlHX6esmy12jg2RxpsW9qsEvPMnyyOkluO7YHLjOj7lOSUyL7CzXfyl5101kt5JbTgT_7idmH-OIaAM1kZbTfia639elEhchzbt7zePrmR4DpmpI8vwi-egZH_JRnOQjzUhUzJCxrEOkGsc1EeeJeR91yfIsCR-IgX-44dZvnpz33tMLSoAfum2INtAbHobouA1Vda36328l4xqoi_Kcq05tC1QRYfogvAp-S3__f1jfiGFL9Aeh6ONllNdpq1OeW5CjsfJwyc4q48YfXPzoPxHIz6aIcXqOY_2L1Gem0_9JZjznk4Zo6048BXJ7RPEEoSQ1jPcijr_4lL-8ZHj2S_xdgrVTnyc2pVLiQgrzHAwKwyOGWIaTX2LoTjn0P-dlKS23e2d92dW0j2GIMDmNsGAwy9GT4uznmekOu31c7v2DhsOE-0mpx7bxy1DX4F8iHs8p-ogwP050686C51e5L52unZbMM8tuLn1eddZrutvFcfcguPlh7L0FwrM3IvxhTp1dK1708src-Ya4LqYDn-lBB-lIB4QV5-fSF5PQHd_gnNLvG6C84t3h-I5oe2nB-1CGQKengTKCo-zXAu3_8ENA5pVVvb-lcKPml6bt2TiCoowvkqoe6N-SXzxJPoghSdkoxBIi-uYQX9tUHR7PbKtfYOHNo7ib_C7HlONiYOr0NDRN4yqF8_BGYgRdKV17oJfA2yEa8J6cFhIyTbLxnq3SLi-yn3tX_dO83xv5S6BWHqJYbIE-mkuh7_E9o8enV1gM4iLB59AvFIM_QB6DL2HD5b2_u1txAf2fLhVAB3EIIB7RH1f5u-kfRTAebmMGujBu_R6YwksD6OUub2XTWtfBZeeenoSBInxKUYopzs7neBRhd3rdAW3tkN63c3yxOH0kQ5zJSAoFjZJzcfYRDeE-9Tfc7xXAZe4l-giG-E52NHGVUYYzVNF4XRNnenSpPNea7L9AFSQLuiV6uD9xm8oFOn13Cew9ugH7ySYlhmk0ywE53Bfou_M-9D0b3cwWrHjnDbU3GRxmY4eQRmi9djZrY4m266PI3twFpEdd5KNcl1kxRZ3zi2TL-e9672yw258N9bpWklIAsgr1gwa5sz7xQwLNS6UtMIeLKg2-hgXsjLeu-HQYVQdXh7Iea31Hw5V8awCFT_4dAOJHw_S5h0OdFOFoEk2iDfcsva9gN3FWRRYVWTHNK1ZN8RRyGqcVZQyKFCdxSSDDQPDscFv44KtcLqSfFc9cI1-5QL5q5po2yvBdEM39_CEEsBuu_5uy3indUvmrRsQ42UhlLKeoNhvfk9PYb_z40m5fK50_PMwXH9HDxyVaff706fO_t3_9gVa3n5b36OGzf_3h7z_Ql-Xd5y8PgS9s3mlotKJgDDDU1fz68rYvkxJjFOXECUq3EhmquWOlb6AB-aOrL_92_t4YM17Z-qiMF9IkSzH7XfuJ2b6L9t9m_rD6IA221RL8CMTTdFx799X50yq-kyIM30agb8SgDUjQns5yjwiq2u_fQU-u2HXCiqQgV3AdZ8kMZ7iI0qvtdZXmeVHlEZmmZQJA02yWpxmZpgwolHF8xa8PmozzKE6TSVqWaVWWGYGY0HKWBmkENeFi4rQ8UXpz5avk1zGOiwxfCVKCMP7rEIz7GQoH05srfe3HatluTJBGghtrBheWW-E_Kekspjfooh8ecIne8X3BVavF9a9_O9AT83SN_y8AAP__O-D2mA">