Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
******************** TEST 'MLIR :: IR/dense-elements-hex.mlir' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/llvm/redhat-linux-build/bin/mlir-opt -allow-unregistered-dialect /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/IR/dense-elements-hex.mlir -verify-diagnostics -split-input-file -mlir-print-elementsattrs-with-hex-if-larger=1 | /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/llvm/redhat-linux-build/bin/FileCheck /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/IR/dense-elements-hex.mlir --check-prefix=HEX
# executed command: /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/llvm/redhat-linux-build/bin/mlir-opt -allow-unregistered-dialect /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/IR/dense-elements-hex.mlir -verify-diagnostics -split-input-file -mlir-print-elementsattrs-with-hex-if-larger=1
# executed command: /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/llvm/redhat-linux-build/bin/FileCheck /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/IR/dense-elements-hex.mlir --check-prefix=HEX
# .---command stderr------------
# | /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/IR/dense-elements-hex.mlir:4:9: error: HEX: expected string not found in input
# | // HEX: dense<"0x000020410000A040"> : tensor<2xf32>
# |         ^
# | <stdin>:1:1: note: scanning from here
# | module {
# | ^
# | <stdin>:2:35: note: possible intended match here
# |  "foo.op"() {dense.attr = dense<[1.000000e+01, 5.000000e+00]> : tensor<2xf32>} : () -> ()
# |                                   ^
# | 
# | Input file: <stdin>
# | Check file: /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/IR/dense-elements-hex.mlir
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |            1: module { 
# | check:4'0     X~~~~~~~~ error: no match found
# |            2:  "foo.op"() {dense.attr = dense<[1.000000e+01, 5.000000e+00]> : tensor<2xf32>} : () -> () 
# | check:4'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | check:4'1                                       ?                                                        possible intended match
# |            3:  "foo.op"() {dense.attr = dense<[1.000000e+01, 5.000000e+00]> : tensor<2xf64>} : () -> () 
# | check:4'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            4:  "foo.op"() {dense.attr = dense<[1.000000e+01, 5.000000e+00]> : tensor<2xf32>} : () -> () 
# | check:4'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            5:  "foo.op"() {dense.attr = dense<[1.000000e+01, 5.000000e+00]> : tensor<2xf64>} : () -> () 
# | check:4'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            6:  "foo.op"() {dense.attr = dense<(1.000000e+01,5.000000e+00)> : tensor<2xcomplex<f32>>} : () -> () 
# | check:4'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            7:  "foo.op"() {dense.attr = dense<(1.000000e+01,5.000000e+00)> : tensor<2xcomplex<f64>>} : () -> () 
# | check:4'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            .
# |            .
# |            .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

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Answer: Here you see the test results for "%s" that were failing and their standard and error output