Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
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Snippet: 
******************** TEST 'MLIR :: Transforms/canonicalize-debuginfo.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/Transforms/canonicalize-debuginfo.mlir -pass-pipeline='builtin.module(func.func(canonicalize{test-convergence}))' -split-input-file -mlir-print-debuginfo | /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/Transforms/canonicalize-debuginfo.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/Transforms/canonicalize-debuginfo.mlir '-pass-pipeline=builtin.module(func.func(canonicalize{test-convergence}))' -split-input-file -mlir-print-debuginfo
# 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/Transforms/canonicalize-debuginfo.mlir
# .---command stderr------------
# | /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/Transforms/canonicalize-debuginfo.mlir:5:17: error: CHECK-NEXT: expected string not found in input
# |  // CHECK-NEXT: arith.constant 42 : index loc(#[[UnknownLoc:.*]])
# |                 ^
# | <stdin>:2:28: note: scanning from here
# |  func.func @merge_constants() -> (index, index, index, index) {
# |                            ^
# | <stdin>:3:9: note: possible intended match here
# |  %c42 = arith.constant 42 : index
# |         ^
# | /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/Transforms/canonicalize-debuginfo.mlir:18:12: error: CHECK: expected string not found in input
# |  // CHECK: arith.constant 88 : i32 loc(#[[UnknownLoc:.*]])
# |            ^
# | <stdin>:10:25: note: scanning from here
# |  func.func @simple_hoist(%arg0: memref<8xi32>) -> i32 {
# |                         ^
# | <stdin>:11:13: note: possible intended match here
# |  %c88_i32 = arith.constant 88 : i32
# |             ^
# | /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/Transforms/canonicalize-debuginfo.mlir:37:17: error: CHECK-NEXT: expected string not found in input
# |  // CHECK-NEXT: arith.constant 42 : i32 loc(#[[UnknownLoc:.*]])
# |                 ^
# | <stdin>:21:28: note: scanning from here
# |  func.func @hoist_and_merge(%arg0: memref<8xi32>) {
# |                            ^
# | <stdin>:22:13: note: possible intended match here
# |  %c42_i32 = arith.constant 42 : i32
# |             ^
# | 
# | Input file: <stdin>
# | Check file: /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/Transforms/canonicalize-debuginfo.mlir
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             1: module { 
# |             2:  func.func @merge_constants() -> (index, index, index, index) { 
# | next:5'0                                  X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
# |             3:  %c42 = arith.constant 42 : index 
# | next:5'0       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | next:5'1               ?                          possible intended match
# |             4:  return %c42, %c42, %c42, %c42 : index, index, index, index 
# | next:5'0       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             5:  } 
# | next:5'0       ~~~
# |             6: } 
# | next:5'0       ~~
# |             7:  
# | next:5'0       ~
# |             8: // ----- 
# | next:5'0       ~~~~~~~~~
# |             9: module { 
# | next:5'0       ~~~~~~~~~
# |            10:  func.func @simple_hoist(%arg0: memref<8xi32>) -> i32 { 
# | next:5'0       ~~~~~~~~~~~~~~~~~~~~~~~~
# | check:18'0                             X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
# |            11:  %c88_i32 = arith.constant 88 : i32 
# | check:18'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | check:18'1                 ?                        possible intended match
# |            12:  %c42_i32 = arith.constant 42 : i32 
# | check:18'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            13:  %c0 = arith.constant 0 : index 
# | check:18'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            14:  memref.store %c42_i32, %arg0[%c0] : memref<8xi32> 
# | check:18'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            15:  return %c88_i32 : i32 
# | check:18'0     ~~~~~~~~~~~~~~~~~~~~~~~
# |            16:  } 
# | check:18'0     ~~~
# |            17: } 
# | check:18'0     ~~
# |            18:  
# | check:18'0     ~
# |            19: // ----- 
# | check:18'0     ~~~~~~~~~
# |            20: module { 
# | check:18'0     ~~~~~~~~~
# |            21:  func.func @hoist_and_merge(%arg0: memref<8xi32>) { 
# | check:18'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | next:37'0                                 X~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
# |            22:  %c42_i32 = arith.constant 42 : i32 
# | next:37'0      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | next:37'1                  ?                        possible intended match
# |            23:  affine.for %arg1 = 0 to 8 { 
# | next:37'0      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            24:  memref.store %c42_i32, %arg0[%arg1] : memref<8xi32> 
# | next:37'0      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            25:  memref.store %c42_i32, %arg0[%arg1] : memref<8xi32> 
# | next:37'0      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            26:  } 
# | next:37'0      ~~~
# |            27:  return 
# | next:37'0      ~~~~~~~~
# |             .
# |             .
# |             .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--


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