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| author | Ayke van Laethem <[email protected]> | 2022-09-15 16:18:15 +0200 |
|---|---|---|
| committer | Ron Evans <[email protected]> | 2022-09-15 19:07:04 +0200 |
| commit | 9e4e182615cd80303c564f95020e0c3bd10af64a (patch) | |
| tree | 74672ad0a55bfb54c998a7500ef0bfc18627dd0f /interp | |
| parent | 5f96d2b7843ceebeedd91acae0985f3bcb8a7516 (diff) | |
| download | tinygo-9e4e182615cd80303c564f95020e0c3bd10af64a.tar.gz tinygo-9e4e182615cd80303c564f95020e0c3bd10af64a.zip | |
interp: fix reading from external global
This fixes https://github.com/tinygo-org/tinygo/issues/3020.
Diffstat (limited to 'interp')
| -rw-r--r-- | interp/interpreter.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/interp/interpreter.go b/interp/interpreter.go index 95c99c842..7cee14bf4 100644 --- a/interp/interpreter.go +++ b/interp/interpreter.go @@ -369,6 +369,11 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent nBytes := uint32(operands[3].Uint()) dstObj := mem.getWritable(dst.index()) dstBuf := dstObj.buffer.asRawValue(r) + if mem.get(src.index()).buffer == nil { + // Looks like the source buffer is not defined. + // This can happen with //extern or //go:embed. + return nil, mem, r.errorAt(inst, errUnsupportedRuntimeInst) + } srcBuf := mem.get(src.index()).buffer.asRawValue(r) copy(dstBuf.buf[dst.offset():dst.offset()+nBytes], srcBuf.buf[src.offset():]) dstObj.buffer = dstBuf |