From: Johannes Schindelin <johannes.schindelin@xxxxxx> Just as in b64d78ad02ca (max_tree_depth: lower it for MSVC to avoid stack overflows, 2023-11-01), I encountered the same problem with the clang builds on Windows/ARM64. The symptom is an exit code 127 when t6700 tries to verify that `git archive big` fails. This exit code is reserved on Unix/Linux to mean "command not found". Unfortunately in this case, it is the fall-back chosen by Cygwin's `pinfo::status_exit()` method when encountering the NSTATUS `STATUS_STACK_OVERFLOW`, see https://github.com/cygwin/cygwin/blob/cygwin-3.6.1/winsup/cygwin/pinfo.cc#L171 I verified manually that the stack overflow always happens somewhere around tree depth 1403, therefore 1280 should be a safe bound in these instances. Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx> --- environment.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/environment.c b/environment.c index 9e4c7781be0..cc853950bb2 100644 --- a/environment.c +++ b/environment.c @@ -82,9 +82,21 @@ int max_allowed_tree_depth = * the stack overflow can occur. */ 512; +#else +#if defined(GIT_WINDOWS_NATIVE) && defined(__clang__) && defined(__aarch64__) + /* + * Similar to Visual C, it seems that on Windows/ARM64 the clang-based + * builds have a smaller stack space available. When running out of + * that stack space, a `STATUS_STACK_OVERFLOW` is produced. When the + * Git command was run from an MSYS2 Bash, this unfortunately results + * in an exit code 127. Let's prevent that by lowering the maximal + * tree depth; This value seems to be low enough. + */ + 1280; #else 2048; #endif +#endif #ifndef PROTECT_HFS_DEFAULT #define PROTECT_HFS_DEFAULT 0 -- gitgitgadget
