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/opaque_locations.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  /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/IR/opaque_locations.mlir -test-opaque-loc -mlir-print-debuginfo -mlir-print-local-scope | /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/opaque_locations.mlir
# executed command: /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/llvm/redhat-linux-build/bin/mlir-opt /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/IR/opaque_locations.mlir -test-opaque-loc -mlir-print-debuginfo -mlir-print-local-scope
# 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/opaque_locations.mlir
# .---command stderr------------
# | /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/IR/opaque_locations.mlir:15:12: error: CHECK: expected string not found in input
# |  // CHECK: -> i32 loc("foo")
# |            ^
# | <stdin>:23:28: note: scanning from here
# |  func.func @inline_notation() -> i32 {
# |                            ^
# | <stdin>:23:31: note: possible intended match here
# |  func.func @inline_notation() -> i32 {
# |                               ^
# | 
# | Input file: <stdin>
# | Check file: /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/IR/opaque_locations.mlir
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |            18: MyLocation: 5: 'affine.for' op  
# |            19: MyLocation: 6: 'func.return' op  
# |            20: MyLocation: 7: 'func.func' op  
# |            21: : 'builtin.module' op  
# |            22: module { 
# |            23:  func.func @inline_notation() -> i32 { 
# | check:15'0                                X~~~~~~~~~~~ error: no match found
# | check:15'1                                   ?         possible intended match
# |            24:  %0 = "test.foo"() : () -> i32 
# | check:15'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            25:  %1 = "test.foo"() : () -> i32 
# | check:15'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            26:  %2 = "test.foo"() : () -> i32 
# | check:15'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            27:  %c4 = arith.constant 4 : index 
# | check:15'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            28:  %c4_0 = arith.constant 4 : index 
# | check:15'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             .
# |             .
# |             .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--


Answer: This shows the output that was gathered for the execution of test 'TEST 'MLIR :: IR/opaque_locations.mlir' FAILED'. It might contain insights into why the test TEST 'MLIR :: IR/opaque_locations.mlir' FAILED failed.