Infinite loop trying to recover from error

[renatoathaydes]

I've just pulled from master and built serve-d locally.

Tried to use it in emacs. It asked me to download DCD which I accepted, but it did not do anything. No visible errors.
But when I looked at the eglot buffer for the process, I saw it was printing this in an infinite loop:

[stderr] 2025-08-14T20:05:06.125 [trace] dcd.d:226:startServer Server: 
[stderr] 2025-08-14T20:05:06.125 [trace] extension.d:995:startDCDServer refreshImports
[stderr] 2025-08-14T20:05:06.125 [trace] dcd.d:259:__lambda_L231_C24 DCD-Server stopped with code -11
[stderr] 2025-08-14T20:05:06.161 [trace] async.d:85:setTimeout Setting timeout for 0 hnsecs
[stderr] 2025-08-14T20:05:06.161 [info] extension.d:1007:startDCDServer Imports for /Users/renatoathaydes/programming/experiments/d/source: ["/Users/renatoathaydes/programming/experiments/d/source", "/Users/renatoathaydes/programming/experiments/d/source"]
[stderr] 2025-08-14T20:05:06.174 [trace] index.d:131:traceIndexerStats Indexer stats for /Users/renatoathaydes/programming/experiments/d/source:
[stderr] 2025-08-14T20:05:06.174 [trace] index.d:133:traceIndexerStats - failed files: ["/Users/renatoathaydes/programming/experiments/d/source/app.d"]
[stderr] 2025-08-14T20:05:06.174 [trace] index.d:134:traceIndexerStats - total modules: 0
[stderr] 2025-08-14T20:05:06.174 [trace] index.d:135:traceIndexerStats - total definitions: 0
[stderr] 2025-08-14T20:05:06.174 [trace] index.d:136:traceIndexerStats - total imports: 0
[stderr] 2025-08-14T20:05:06.174 [trace] async.d:85:setTimeout Setting timeout for 2 secs and 500 ms
[stderr] 2025-08-14T20:05:06.174 [trace] stdlib_detect.d:51:autoDetectStdlibPaths falling back to global imports search
[stderr] 2025-08-14T20:05:06.174 [warning] stdlib_detect.d:113:detectDMDStdlibPaths Could not find DMD in $PATH for stdlib auto-detection! Checking for dmd.conf at hardcoded system-wide location...
[stderr] 2025-08-14T20:05:06.174 [warning] stdlib_detect.d:59:autoDetectStdlibPaths returning to default hardcoded fallback phobos paths
[stderr] 2025-08-14T20:05:06.174 [trace] extension.d:988:startDCDServer Running DCD setup
[stderr] 2025-08-14T20:05:06.174 [trace] stdlib_detect.d:51:autoDetectStdlibPaths falling back to global imports search
[stderr] 2025-08-14T20:05:06.174 [warning] stdlib_detect.d:113:detectDMDStdlibPaths Could not find DMD in $PATH for stdlib auto-detection! Checking for dmd.conf at hardcoded system-wide location...
[stderr] 2025-08-14T20:05:06.174 [trace] index.d:341:__lambda_L325_C19 Indexing 2 files inside workspace /Users/renatoathaydes/programming/experiments/d/source...
[stderr] 2025-08-14T20:05:06.174 [warning] stdlib_detect.d:59:autoDetectStdlibPaths returning to default hardcoded fallback phobos paths
[stderr] 2025-08-14T20:05:06.174 [trace] extension.d:993:startDCDServer startServer ["/Library/D/dmd/src/druntime/import", "/Library/D/dmd/src/phobos"]
[stderr] 2025-08-14T20:05:06.174 [trace] dcd.d:219:startServer Start dcd-server ["/Users/renatoathaydes/.code-d/bin/dcd-server", "--socketFile", "/var/folders/hn/dv8742714txg_k2b6yd9djf40000gn/T/workspace-d-sock55455-38IISFDJ64AC6"]
[stderr] 2025-08-14T20:05:06.174 [trace] index.d:346:__lambda_L345_C24 Done indexing 2 files in 120 μs and 6 hnsecs
[stderr] 2025-08-14T20:05:06.175 [trace] index.d:190:saveIndex Saved file index with 0 entries to /var/folders/hn/dv8742714txg_k2b6yd9djf40000gn/T/serve-d/symbolindex.bin


[stderr] 2025-08-14T20:05:06.210 [trace] dcd.d:226:startServer Server: 
[stderr] 2025-08-14T20:05:06.210 [trace] extension.d:995:startDCDServer refreshImports
[stderr] 2025-08-14T20:05:06.210 [trace] dcd.d:259:__lambda_L231_C24 DCD-Server stopped with code -11
[stderr] 2025-08-14T20:05:06.260 [trace] async.d:85:setTimeout Setting timeout for 0 hnsecs
[stderr] 2025-08-14T20:05:06.260 [info] extension.d:1007:startDCDServer Imports for /Users/renatoathaydes/programming/experiments/d/source: ["/Users/renatoathaydes/programming/experiments/d/source", "/Users/renatoathaydes/programming/experiments/d/source"]
[stderr] 2025-08-14T20:05:06.273 [trace] index.d:131:traceIndexerStats Indexer stats for /Users/renatoathaydes/programming/experiments/d/source:
[stderr] 2025-08-14T20:05:06.273 [trace] index.d:133:traceIndexerStats - failed files: ["/Users/renatoathaydes/programming/experiments/d/source/app.d"]
[stderr] 2025-08-14T20:05:06.273 [trace] index.d:134:traceIndexerStats - total modules: 0
[stderr] 2025-08-14T20:05:06.273 [trace] index.d:135:traceIndexerStats - total definitions: 0
[stderr] 2025-08-14T20:05:06.273 [trace] index.d:136:traceIndexerStats - total imports: 0
[stderr] 2025-08-14T20:05:06.273 [trace] async.d:85:setTimeout Setting timeout for 2 secs and 500 ms
[stderr] 2025-08-14T20:05:06.273 [trace] stdlib_detect.d:51:autoDetectStdlibPaths falling back to global imports search
[stderr] 2025-08-14T20:05:06.274 [warning] stdlib_detect.d:113:detectDMDStdlibPaths Could not find DMD in $PATH for stdlib auto-detection! Checking for dmd.conf at hardcoded system-wide location...
[stderr] 2025-08-14T20:05:06.274 [warning] stdlib_detect.d:59:autoDetectStdlibPaths returning to default hardcoded fallback phobos paths
[stderr] 2025-08-14T20:05:06.274 [trace] extension.d:988:startDCDServer Running DCD setup
[stderr] 2025-08-14T20:05:06.274 [trace] stdlib_detect.d:51:autoDetectStdlibPaths falling back to global imports search
[stderr] 2025-08-14T20:05:06.274 [warning] stdlib_detect.d:113:detectDMDStdlibPaths Could not find DMD in $PATH for stdlib auto-detection! Checking for dmd.conf at hardcoded system-wide location...
[stderr] 2025-08-14T20:05:06.274 [trace] index.d:341:__lambda_L325_C19 Indexing 2 files inside workspace /Users/renatoathaydes/programming/experiments/d/source...
[stderr] 2025-08-14T20:05:06.274 [warning] stdlib_detect.d:59:autoDetectStdlibPaths returning to default hardcoded fallback phobos paths
[stderr] 2025-08-14T20:05:06.274 [trace] extension.d:993:startDCDServer startServer ["/Library/D/dmd/src/druntime/import", "/Library/D/dmd/src/phobos"]
[stderr] 2025-08-14T20:05:06.274 [trace] index.d:346:__lambda_L345_C24 Done indexing 2 files in 114 μs and 5 hnsecs
[stderr] 2025-08-14T20:05:06.274 [trace] index.d:190:saveIndex Saved file index with 0 entries to /var/folders/hn/dv8742714txg_k2b6yd9djf40000gn/T/serve-d/symbolindex.bin
[stderr] 2025-08-14T20:05:06.274 [trace] dcd.d:219:startServer Start dcd-server ["/Users/renatoathaydes/.code-d/bin/dcd-server", "--socketFile", "/var/folders/hn/dv8742714txg_k2b6yd9djf40000gn/T/workspace-d-sock55455-2ZFN4FM96DF88"]


[stderr] 2025-08-14T20:05:06.321 [trace] dcd.d:226:startServer Server: 
[stderr] 2025-08-14T20:05:06.321 [trace] extension.d:995:startDCDServer refreshImports
[stderr] 2025-08-14T20:05:06.321 [trace] dcd.d:259:__lambda_L231_C24 DCD-Server stopped with code -11
[stderr] 2025-08-14T20:05:06.405 [trace] async.d:85:setTimeout Setting timeout for 0 hnsecs
[stderr] 2025-08-14T20:05:06.405 [info] extension.d:1007:startDCDServer Imports for /Users/renatoathaydes/programming/experiments/d/source: ["/Users/renatoathaydes/programming/experiments/d/source", "/Users/renatoathaydes/programming/experiments/d/source"]
[stderr] 2025-08-14T20:05:06.418 [trace] index.d:131:traceIndexerStats Indexer stats for /Users/renatoathaydes/programming/experiments/d/source:
[stderr] 2025-08-14T20:05:06.418 [trace] index.d:133:traceIndexerStats - failed files: ["/Users/renatoathaydes/programming/experiments/d/source/app.d"]
[stderr] 2025-08-14T20:05:06.418 [trace] index.d:134:traceIndexerStats - total modules: 0
[stderr] 2025-08-14T20:05:06.418 [trace] index.d:135:traceIndexerStats - total definitions: 0
[stderr] 2025-08-14T20:05:06.418 [trace] index.d:136:traceIndexerStats - total imports: 0
[stderr] 2025-08-14T20:05:06.418 [trace] async.d:85:setTimeout Setting timeout for 2 secs and 500 ms
[stderr] 2025-08-14T20:05:06.418 [trace] stdlib_detect.d:51:autoDetectStdlibPaths falling back to global imports search
[stderr] 2025-08-14T20:05:06.418 [warning] stdlib_detect.d:113:detectDMDStdlibPaths Could not find DMD in $PATH for stdlib auto-detection! Checking for dmd.conf at hardcoded system-wide location...
[stderr] 2025-08-14T20:05:06.418 [warning] stdlib_detect.d:59:autoDetectStdlibPaths returning to default hardcoded fallback phobos paths
[stderr] 2025-08-14T20:05:06.418 [trace] extension.d:988:startDCDServer Running DCD setup
[stderr] 2025-08-14T20:05:06.418 [trace] stdlib_detect.d:51:autoDetectStdlibPaths falling back to global imports search
[stderr] 2025-08-14T20:05:06.418 [warning] stdlib_detect.d:113:detectDMDStdlibPaths Could not find DMD in $PATH for stdlib auto-detection! Checking for dmd.conf at hardcoded system-wide location...
[stderr] 2025-08-14T20:05:06.418 [trace] index.d:341:__lambda_L325_C19 Indexing 2 files inside workspace /Users/renatoathaydes/programming/experiments/d/source...
[stderr] 2025-08-14T20:05:06.418 [warning] stdlib_detect.d:59:autoDetectStdlibPaths returning to default hardcoded fallback phobos paths
[stderr] 2025-08-14T20:05:06.418 [trace] extension.d:993:startDCDServer startServer ["/Library/D/dmd/src/druntime/import", "/Library/D/dmd/src/phobos"]
[stderr] 2025-08-14T20:05:06.418 [trace] index.d:346:__lambda_L345_C24 Done indexing 2 files in 114 μs and 7 hnsecs
[stderr] 2025-08-14T20:05:06.418 [trace] index.d:190:saveIndex Saved file index with 0 entries to /var/folders/hn/dv8742714txg_k2b6yd9djf40000gn/T/serve-d/symbolindex.bin
[stderr] 2025-08-14T20:05:06.418 [trace] dcd.d:219:startServer Start dcd-server ["/Users/renatoathaydes/.code-d/bin/dcd-server", "--socketFile", "/var/folders/hn/dv8742714txg_k2b6yd9djf40000gn/T/workspace-d-sock55455-2CQIGVSB7QQO1"]


[stderr] 2025-08-14T20:05:06.465 [trace] dcd.d:226:startServer Server: 
[stderr] 2025-08-14T20:05:06.465 [trace] extension.d:995:startDCDServer refreshImports
[stderr] 2025-08-14T20:05:06.465 [trace] dcd.d:259:__lambda_L231_C24 DCD-Server stopped with code -11

I added two empty lines between the repeated parts of the log.

This continued even after I closed the D files!

I don't have DMD installed in the default path because DMD doesn't work on Mac, currently (it used to work, badly but worked, but since a few months back, it just cannot run at all).

I can see that even though /Library/D/ does not exist, ~/.code-d/bin/dcd-server does, but trying to run that results in a Segmentation fault (as with all DMD binaries on Mac, currently).

I understand that this is why the error is happening, but I can't understand why instead of telling me that there's an error, it decides to retry infinitely.

[renatoathaydes]

Notice that when serve-d starts, it pops up a question "Choose an option:" with a single option: Download DCD.
I don't want to download DCD, as I know it won't work if I download it! But there's no way to say "no" or to skip it.

I tried to compile dcd inside serve-d but when I try it, it complains about the dependency it needs not being in the dependency tree, which ie an error I don't understand (and there's no instructions on how to buiild DCD in its README).

[renatoathaydes]

I found out I can easily compile DCD from https://github.com/dlang-community/DCD?tab=readme-ov-file

I forced serve-d to use my local compiled version of DCD which works by linking from the location serve-d expects it to be (which it otherwise keeps trying to download again).

It still won't work. The serve-d server crashes again and again, it doesn't print the error so I have no idea how to proceed.

It's like: if you want to write D code on MacOS, it's almost impossible now.