tcrun051 fails on Windows

tcrun015 inexplicably causes the compiler to segmentation fault on Windows:

=====> tcrun051(normal) 6878 of 7380 [0, 3, 11]
Compile failed (exit code 11) errors were:
[1 of 1] Compiling Main             ( tcrun051.hs, tcrun051.o )

Access violation in generated code when writing 0x0

 Attempting to reconstruct a stack trace...

   Frame	Code address
 * 0x4e8da90	0x30f20b7 C:\GitLabRunner\builds\2WeHDSFP\0\ghc\ghc\_build\install\bin\ghc.exe+0x2cf20b7
 * 0x4e8da98	0x30dce19 C:\GitLabRunner\builds\2WeHDSFP\0\ghc\ghc\_build\install\bin\ghc.exe+0x2cdce19
 * 0x4e8daa0	0x3
 * 0x4e8daa8	0x6be9b71
 * 0x4e8dab0	0x43cdd48 C:\GitLabRunner\builds\2WeHDSFP\0\ghc\ghc\_build\install\bin\ghc.exe+0x3fcdd48
 * 0x4e8dab8	0x6fca750


*** unexpected failure for tcrun051(normal)

I'll mark this as broken.